Step-by-Step Guide: How to Fix and Troubleshoot Your AC Unit

A comprehensive guide to diagnosing and repairing common AC problems using professional techniques, electrical testing, and diagnostic tools.

What You'll Accomplish: Diagnose and fix 90% of common AC problems using professional HVAC techniques, electrical testing, and component replacement procedures
Time Required: 2-6 hours depending on issue complexity and repair requirements
What You Need: Digital multimeter, basic hand tools, safety equipment, replacement parts as needed, electrical testing tools

Step 1: Safety Preparation and Power Isolation

Goal: Establish complete electrical isolation and safe working conditions using professional lockout/tagout procedures

1. Turn off power at the main electrical panel:

   • Locate your home's electrical panel and find the AC unit breaker (usually labeled "AC", "Air Conditioner", or "HVAC")
   • Switch the breaker to OFF position - you should hear a definitive click
   • Use a non-contact voltage tester to verify no power at the outdoor disconnect switch
   • Expected result: Voltage tester shows no electrical activity at all connection points

2. Turn off power at the outdoor disconnect switch:

   • Locate the outdoor disconnect box near your AC unit (gray metal box with handle or fuse pullout)
   • Pull the disconnect handle to OFF position or remove the fuse block completely
   • Place a lockout tag if available to prevent accidental power restoration
   • Expected result: Complete electrical isolation with physical disconnect verified

3. Gather essential safety equipment and tools:

   • Put on safety glasses and work gloves
   • Get a digital multimeter, flashlight, and basic hand tools
   • Have a Class C fire extinguisher nearby for electrical fires
   • Expected result: All safety equipment ready and easily accessible

4. Perform comprehensive safety inspection:

   • Look for obvious hazards: damaged wiring, water leaks, gas odors, or structural damage
   • Check for signs of electrical burning, melted components, or corrosion
   • Inspect area around both indoor and outdoor units for safe access and proper lighting
   • Expected result: Safe working environment confirmed with no immediate hazards identified

5. Document initial system assessment:

   • Check thermostat display - note any error codes or unusual messages
   • Listen for any unusual sounds when attempting to start system (with power still off)
   • Observe general condition of both indoor and outdoor units
   • Expected result: Initial problem symptoms documented for systematic diagnosis

If breaker immediately trips when reset: Stop work immediately - indicates serious electrical fault requiring professional service
If you smell gas or see sparks: Evacuate area, call emergency services, do not continue troubleshooting
If outdoor unit is frozen solid: Allow 4-6 hours for complete thaw before proceeding with diagnosis

You'll know you're done when: Complete electrical isolation is achieved and safe working conditions are established

• Power confirmed OFF at both breaker and disconnect switch
• All safety equipment gathered and PPE worn
• Visual inspection shows no immediate safety hazards
• Initial problem symptoms identified and documented
• Work area is clear and well-lit for detailed diagnosis

Ready for next step? You now have a completely safe workspace with proper electrical isolation to begin systematic troubleshooting.

Step 2: Thermostat and Control System Diagnosis

Goal: Test thermostat operation, verify control system wiring, and diagnose 24V AC control circuits

1. Check thermostat power and basic settings:

   • Examine the thermostat display - should show current temperature and be responsive
   • Replace thermostat batteries if display is dim or unresponsive
   • Set thermostat to COOL mode and temperature 5°F below current room temperature
   • Expected result: Display shows clear readings and responds to setting changes

2. Remove thermostat from wall plate for wiring inspection:

   • Carefully pull the thermostat body straight out from the wall plate
   • Identify the wire colors and their terminal connections
   • Look for loose connections, corrosion, or damaged wire insulation
   • Expected result: All wires securely connected with no visible damage

3. Test 24V AC power supply with multimeter:

   • Set your multimeter to AC voltage mode (V~)
   • Test voltage between R wire (red, power) and C wire (blue/black, common)
   • Should read 24V AC - this is the control voltage from the transformer
   • Expected result: Multimeter reads 22-26V AC between R and C terminals

4. Test cooling system control circuit:

   • With multimeter still on AC voltage, test between R wire and Y wire (yellow, cooling)
   • Temporarily connect R and Y wires together using a wire nut to bypass thermostat
   • Listen for outdoor unit to start running - this tests the cooling contactor
   • Expected result: Outdoor unit starts when R and Y are connected, stops when disconnected

5. Test fan control circuit:

   • Test voltage between R wire and G wire (green, fan)
   • Connect R and G wires together to test blower fan operation
   • Indoor blower fan should start running when wires are connected
   • Expected result: Blower fan operates when R and G are connected

If no 24V power at R-C terminals: Check transformer fuse in indoor unit - may be blown
If outdoor unit doesn't start with R-Y connected: Problem is in contactor or compressor circuit
If blower fan doesn't run with R-G connected: Check blower motor capacitor and motor windings

You'll know you're done when: Thermostat and control circuits are fully tested and diagnosed

• Thermostat display is clear and responsive
• 24V AC power confirmed between R and C wires
• Cooling circuit tested by connecting R-Y wires
• Fan circuit tested by connecting R-G wires
• All wire connections are secure and properly terminated

Ready for next step? You've verified the control system works and can now test the electrical components that receive these control signals.

Step 3: Electrical System Testing and Component Diagnosis

Goal: Test electrical components including capacitors, contactors, and wiring using professional diagnostic techniques

1. Locate and safely discharge the capacitor:

   • Find the capacitor in the outdoor unit (cylindrical component with wires)
   • Use a capacitor discharge tool or insulated screwdriver to safely discharge stored energy
   • Touch the discharge tool across both capacitor terminals simultaneously for 5 seconds
   • Expected result: Any stored electrical charge is safely dissipated

2. Test capacitor with multimeter:

   • Set your multimeter to capacitance mode (usually marked as µF or nF)
   • Touch multimeter probes to the capacitor terminals
   • Compare reading to the rated value printed on capacitor label (e.g., 45µF)
   • Expected result: Reading should be within 10% of rated value (40.5-49.5µF for a 45µF capacitor)

3. Inspect capacitor for physical damage:

   • Look for bulging, leaking, or burnt appearance
   • Check for corroded terminals or loose wire connections
   • Smell for any burning odor or chemical smell
   • Expected result: Physical condition assessment reveals any obvious failure signs

4. Test contactor switch operation:

   • Locate the contactor (square relay with thick wires and thin control wires)
   • Use multimeter on resistance mode (Ω) to test coil resistance
   • Test between the two thin coil terminals - should read 10-100 ohms
   • Expected result: Coil resistance within normal range indicates functional electromagnet

5. Test contactor contact points:

   • Set multimeter to continuity mode (usually has a sound symbol)
   • Test across the main contact points (thick wires) when contactor is not energized
   • Should show open circuit (no continuity) when contactor is off
   • Expected result: Contacts are properly open when system is not running

6. Test high voltage wiring connections:

   • Use non-contact voltage tester to verify power is still OFF
   • Inspect all wire connections for tightness and corrosion
   • Check wire insulation for cracks, burns, or animal damage
   • Expected result: All connections secure with no visible damage to wiring

If capacitor reads 0µF or infinite: Capacitor is failed and needs replacement
If contactor coil shows infinite resistance: Coil is burned out - replace entire contactor
If contact points show continuity when off: Contacts are welded - replace contactor immediately

You'll know you're done when: All electrical components are tested and their condition is determined

• Capacitor tested and reading compared to rated value
• Contactor coil resistance measured and within normal range
• Contact points tested for proper operation
• All electrical connections inspected and secured
• Any failed components identified for replacement

Ready for next step? You've diagnosed the electrical system and can now check the mechanical components that affect airflow and cooling.

Step 4: Airflow System Inspection and Filter Maintenance

Goal: Ensure proper airflow throughout the system by inspecting filters, ductwork, and blower components

1. Locate and inspect the air filter:

   • Find the air filter (usually in return air duct or air handler)
   • Remove the filter and hold it up to light to check for dirt accumulation
   • Check the filter size printed on the frame (e.g., 16x25x1 inches)
   • Expected result: Filter condition assessed and correct size identified for replacement

2. Test airflow at supply vents:

   • Use a tissue paper or anemometer to test airflow at each supply vent
   • Hold tissue 6 inches from vent - should be drawn toward vent with strong airflow
   • Test all vents throughout the house to identify weak or blocked airflow
   • Expected result: Strong, consistent airflow from all supply vents

3. Inspect accessible ductwork for damage:

   • Look for disconnected ducts, air leaks, or physical damage
   • Check duct insulation for tears or missing sections
   • Look for obstructions like debris, animals, or collapsed sections
   • Expected result: Ductwork integrity verified with no major leaks or damage

4. Test blower fan operation and airflow:

   • Temporarily restore power and set thermostat to fan-only mode
   • Listen for smooth blower fan operation without grinding or squealing
   • Check airflow strength at the return air grille - should have strong suction
   • Expected result: Blower operates smoothly with strong airflow throughout system

5. Inspect blower compartment and motor:

   • Turn power back OFF and access the blower compartment
   • Check blower wheel for dirt buildup or damage
   • Inspect motor bearings and drive belt (if equipped) for wear
   • Expected result: Blower components clean and in good mechanical condition

6. Replace air filter with correct specification:

   • Install new air filter matching exact size and MERV rating
   • Ensure airflow direction arrow points toward the blower unit
   • Secure filter access panel properly to prevent air bypass
   • Expected result: New filter installed correctly with proper airflow direction

If weak airflow from vents: Check for clogged filter or blocked return air
If blower makes noise: Clean blower wheel or check for loose components
If some vents have no airflow: Check for disconnected ducts or closed dampers

You'll know you're done when: Airflow system is fully inspected and optimized for proper operation

• Air filter replaced with correct size and MERV rating
• All supply vents tested and showing strong airflow
• Accessible ductwork inspected for leaks and damage
• Blower fan operation tested and running smoothly
• Blower components cleaned and in good condition

Ready for next step? You've ensured proper airflow and can now inspect the outdoor unit and heat exchange components.

Step 5: Outdoor Unit and Condenser System Diagnosis

Goal: Inspect and test outdoor unit components including condenser coils, fan motor, and heat exchange system

1. Clear debris and inspect unit clearance:

   • Remove all debris (leaves, grass, dirt) from around the condenser unit
   • Ensure minimum 2-3 feet of clearance on all sides for proper airflow
   • Check for overgrown vegetation or obstructions blocking airflow
   • Expected result: Clean area with adequate clearance for optimal air circulation

2. Inspect condenser coils for dirt and damage:

   • Look through the condenser coil fins for dirt buildup, bent fins, or blockages
   • Check for physical damage like crushed fins or punctured coils
   • Look for signs of refrigerant leaks (oil stains, ice formation, hissing sounds)
   • Expected result: Coil condition assessed with any damage or blockages identified

3. Clean condenser coils with appropriate tools:

   • Use a coil cleaning brush or fin comb to straighten bent fins
   • Spray coil cleaner on dirty coils and let sit per manufacturer instructions
   • Rinse with garden hose from inside-out to avoid pushing dirt deeper
   • Expected result: Clean coils with straight fins and no visible dirt buildup

4. Test condenser fan motor operation:

   • Temporarily restore power and observe condenser fan operation
   • Fan should start smoothly and run without grinding, squealing, or wobbling
   • Check fan blades for damage, cracks, or loose mounting
   • Expected result: Fan operates smoothly with strong airflow and no unusual noises

5. Inspect refrigerant lines and connections:

   • Check refrigerant line insulation for tears, missing sections, or damage
   • Look for loose connections at service valves and fittings
   • Check for ice formation on lines (indicates possible refrigerant issues)
   • Expected result: Refrigerant lines properly insulated with secure connections

6. Test compressor operation and sound:

   • Listen to compressor operation - should run smoothly without excessive noise
   • Check for excessive vibration or loose mounting
   • Feel for proper heat generation at compressor housing (should be warm, not burning hot)
   • Expected result: Compressor runs smoothly with normal operating temperature and sound

If condenser fan doesn't run: Check fan motor capacitor and motor wiring connections
If compressor doesn't start: Test compressor capacitor and contactor operation
If coils won't clean: Use professional coil cleaner or consider professional cleaning service

You'll know you're done when: Outdoor unit is fully inspected, cleaned, and tested for proper operation

• Area around unit cleared with proper clearance maintained
• Condenser coils cleaned and fins straightened
• Condenser fan tested and operating smoothly
• Refrigerant lines inspected for damage and proper insulation
• Compressor operation verified with normal sound and temperature

Ready for next step? You've ensured the outdoor unit is clean and operating properly, now you can analyze the refrigerant system performance.

Step 6: Refrigerant System Analysis and Leak Detection

Goal: Diagnose refrigerant system performance and detect leaks using visual inspection and basic diagnostic techniques

1. Perform visual inspection for refrigerant leaks:

   • Look for oil stains around line connections, service valves, and fittings
   • Check for ice formation on refrigerant lines (indicates possible leak or restriction)
   • Listen for hissing sounds that could indicate active refrigerant leaks
   • Expected result: Any visible signs of refrigerant leaks identified and documented

2. Check refrigerant line temperatures:

   • Feel the suction line (larger, insulated line) - should be cool/cold when system runs
   • Feel the liquid line (smaller line) - should be warm when system runs
   • Compare temperatures between both lines to assess system performance
   • Expected result: Temperature differences indicate proper refrigerant circulation

3. Inspect evaporator coil for ice formation:

   • Access the evaporator coil in the indoor unit (may require removing access panel)
   • Look for ice buildup on coil fins or refrigerant lines
   • Check for dirt accumulation that could restrict airflow and cause freezing
   • Expected result: Evaporator coil condition assessed for ice formation or blockages

4. Test cooling performance with thermometer:

   • Use a digital thermometer to measure supply air temperature at vents
   • Measure return air temperature at return grille
   • Calculate temperature split (return temp minus supply temp) - should be 15-20°F
   • Expected result: Temperature measurements indicate proper cooling performance

5. Check for proper refrigerant line insulation:

   • Inspect insulation on suction line for tears, gaps, or missing sections
   • Look for condensation on uninsulated portions (indicates insulation problems)
   • Check that liquid line is properly insulated where required
   • Expected result: All refrigerant lines properly insulated to prevent energy loss

6. Document system performance indicators:

   • Record system runtime and cycling patterns during operation
   • Note any short cycling or continuous operation issues
   • Document cooling capacity compared to outdoor temperature conditions
   • Expected result: Complete performance assessment documented for professional evaluation

If ice forms on evaporator coil: Check for dirty air filter or low refrigerant levels
If temperature split is less than 15°F: Indicates possible low refrigerant or airflow problems
If oil stains found: Contact EPA certified technician for leak repair and refrigerant service

You'll know you're done when: Refrigerant system performance is fully assessed and any issues are identified

• Visual inspection completed for refrigerant leak signs
• Line temperatures checked and compared
• Evaporator coil inspected for ice or dirt
• Cooling performance measured with temperature split calculation
• System performance documented for professional evaluation if needed

Ready for next step? You've assessed the refrigerant system and can now check the drainage system for proper condensate removal.

Step 7: Drainage System Maintenance and Blockage Clearing

Goal: Clear condensate drainage blockages and ensure proper water removal from the AC system

1. Locate the condensate drain line and drain pan:

   • Find the condensate drain line (usually a PVC pipe near the indoor unit)
   • Locate the drain pan underneath the evaporator coil in the indoor unit
   • Check for water pooling around the indoor unit indicating drainage problems
   • Expected result: Drainage system components identified and any water accumulation noted

2. Inspect drain pan for clogs and damage:

   • Remove the drain pan if accessible (may require removing access panel)
   • Check for algae growth, mold, or debris accumulation
   • Look for cracks or damage that could cause leaks
   • Expected result: Drain pan condition assessed and any blockages or damage identified

3. Clear drain line blockages with wet/dry vacuum:

   • Connect a wet/dry vacuum to the end of the drain line (outside the house)
   • Create a tight seal using duct tape around the vacuum hose and drain line
   • Run vacuum for 2-3 minutes to suction out clogs and debris
   • Expected result: Blockages removed and water flows freely through drain line

4. Flush drain line with cleaning solution:

   • Pour 1 cup of white vinegar into the drain line at the indoor unit
   • Let the vinegar solution sit for 30 minutes to dissolve algae and buildup
   • Flush with clean water to remove loosened debris and cleaning solution
   • Expected result: Drain line cleaned and sanitized to prevent future blockages

5. Clean and sanitize the drain pan:

   • Wash the drain pan with warm soapy water to remove all debris
   • Apply a bleach solution (1:10 ratio) to kill mold and algae
   • Rinse thoroughly and dry completely before reinstalling
   • Expected result: Drain pan clean, sanitized, and ready for proper operation

6. Test drainage system operation:

   • Pour water into the drain pan to test proper drainage flow
   • Verify water flows smoothly through the drain line without backing up
   • Check that drain line outlet outside is clear and water exits properly
   • Expected result: Complete drainage system tested and functioning properly

If vacuum doesn't remove blockage: Use a drain snake or call professional for power cleaning
If drain pan keeps filling: Check for improper drain line slope or failed condensate pump
If mold keeps returning: Install UV light in drain pan area or improve ventilation

You'll know you're done when: Drainage system is completely clear and functioning properly

• Drain pan cleaned and free of algae, mold, or debris
• Drain line cleared of all blockages using vacuum suction
• Drain line flushed with vinegar solution and rinsed clean
• Drainage system tested with water flow verification
• No water pooling or backup around indoor unit

Ready for next step? You've ensured proper condensate drainage and can now perform advanced component testing and diagnostics.

Step 8: Advanced Component Testing and Diagnostic Procedures

Goal: Perform professional-level diagnostic testing on all AC components using advanced troubleshooting techniques

1. Test motor amp draw with clamp meter:

   • Use a clamp meter to measure compressor amp draw during operation
   • Compare readings to the nameplate amperage rating on the unit
   • Test blower motor and condenser fan motor amp draw
   • Expected result: All motor amp draws within 10% of nameplate ratings

2. Perform insulation resistance testing:

   • Use a megohmmeter to test motor winding insulation
   • Test between each motor winding and ground - should read >1 megohm
   • Test compressor winding resistance between start, run, and common terminals
   • Expected result: Proper insulation resistance indicates healthy motor windings

3. Test control board operation and signals:

   • Check control board LED indicators for diagnostic codes
   • Test 24V control signals from board to components using multimeter
   • Verify safety switch operation (pressure switches, float switches)
   • Expected result: Control board sends proper signals and responds to safety inputs

4. Perform component isolation testing:

   • Disconnect individual components to isolate electrical faults
   • Test each component separately using appropriate testing procedures
   • Use jumper wires to bypass suspected faulty components
   • Expected result: Faulty components identified through systematic isolation

5. Test system pressures and temperatures:

   • Use manifold gauges to check refrigerant pressures (requires EPA certification)
   • Measure superheat and subcooling temperatures
   • Compare readings to manufacturer specifications for system
   • Expected result: System pressures and temperatures within normal operating ranges

6. Document all test results and findings:

   • Record all electrical test results with component specifications
   • Document any component failures or out-of-specification readings
   • Create a diagnostic report with recommended repairs
   • Expected result: Complete diagnostic documentation for repair planning

If amp draw is too high: Check for mechanical binding or dirty coils causing overload
If insulation resistance is low: Motor windings are failing - replacement required
If control board shows error codes: Consult manufacturer error code manual for specific diagnosis

You'll know you're done when: Complete professional-level diagnostic testing is performed on all system components

• All motor amp draws measured and compared to specifications
• Insulation resistance tested on all motor windings
• Control board operation verified with signal testing
• Component isolation testing completed to identify faults
• All test results documented with repair recommendations

Ready for next step? You've completed comprehensive diagnostics and can now proceed with specific repair procedures for any identified problems.

Step 9: Repair Procedures and Component Replacement

Goal: Execute specific repair procedures and replace faulty components using proper techniques and specifications

1. Replace faulty capacitor with exact specifications:

   • Purchase replacement capacitor matching exact microfarad rating and voltage
   • Discharge old capacitor safely using discharge tool
   • Remove old capacitor and install new one with identical wire connections
   • Expected result: New capacitor installed with proper electrical connections

2. Replace defective contactor with proper specifications:

   • Order replacement contactor matching amp rating and coil voltage
   • Take photo of existing wiring connections before removal
   • Install new contactor using identical wire routing and proper torque specifications
   • Expected result: New contactor installed with correct wiring and secure connections

3. Replace damaged fan motor with proper mounting:

   • Order replacement fan motor matching horsepower, RPM, and mounting dimensions
   • Remove old motor and transfer fan blade to new motor shaft
   • Install new motor with proper mounting hardware and electrical connections
   • Expected result: New motor installed with proper alignment and secure mounting

4. Repair refrigerant leaks (professional service required):

   • Contact EPA certified technician for leak repair and system recharge
   • Ensure technician performs leak detection testing and vacuum evacuation
   • Verify proper refrigerant charge per manufacturer specifications
   • Expected result: All leaks repaired and system properly recharged by certified professional

5. Replace damaged wiring and connections:

   • Use proper wire gauge and insulation rating for replacement wiring
   • Make connections using wire nuts or proper terminals
   • Secure all wiring with appropriate clamps and proper routing
   • Expected result: All electrical connections made to code with proper wire management

6. Test all repairs before final assembly:

   • Test each repaired component individually before system startup
   • Verify proper electrical connections with multimeter testing
   • Check all mechanical connections for tightness and alignment
   • Expected result: All repairs tested and verified before system operation

If new component doesn't work: Verify specifications match exactly and check wiring connections
If system still doesn't start: Check safety switches and control board operation
If refrigerant leak persists: May require coil replacement or major component replacement

You'll know you're done when: All identified problems are repaired using proper procedures and specifications

• Faulty capacitors replaced with exact specifications
• Defective contactors replaced with proper wiring
• Failed motors replaced with correct mounting and connections
• Refrigerant leaks repaired by certified professional
• All repairs tested individually before system startup

Ready for next step? You've completed all necessary repairs and can now perform comprehensive system testing and establish preventive maintenance procedures.

Step 10: System Testing and Preventive Maintenance Setup

Goal: Verify all repairs through comprehensive system testing and establish ongoing preventive maintenance schedule

1. Perform systematic startup sequence:

   • Restore power at both circuit breaker and disconnect switch
   • Set thermostat to COOL mode 5°F below room temperature
   • Observe startup sequence: thermostat → indoor blower → outdoor unit
   • Expected result: System starts in proper sequence without unusual noises or delays

2. Test all system components under load:

   • Verify compressor operation - should start smoothly and run continuously
   • Check condenser fan and blower fan operation
   • Test cooling performance by measuring supply air temperature
   • Expected result: All components operate smoothly with proper cooling output

3. Measure and document system performance:

   • Record supply air temperature and return air temperature
   • Calculate temperature split (should be 15-20°F)
   • Measure amp draw of all motors and compare to nameplate ratings
   • Expected result: All performance measurements within normal operating ranges

4. Test safety and control systems:

   • Test thermostat cycling by adjusting temperature settings
   • Verify safety switches operate correctly (float switch, pressure switches)
   • Test emergency shutdown procedures work properly
   • Expected result: All safety and control systems respond correctly to inputs

5. Create preventive maintenance schedule:

   • Set up monthly tasks: filter inspection, drain line check, outdoor unit cleaning
   • Schedule seasonal tasks: coil cleaning, electrical connections, refrigerant check
   • Plan annual professional service for comprehensive system inspection
   • Expected result: Complete maintenance schedule established with specific tasks and timing

6. Document system specifications and maintenance records:

   • Record all system specifications (model numbers, capacitor ratings, refrigerant type)
   • Create maintenance log with dates, tasks performed, and findings
   • Document baseline performance measurements for future comparison
   • Expected result: Complete documentation system established for ongoing maintenance tracking

If system short cycles: Check thermostat location and refrigerant charge
If cooling performance is poor: Verify airflow restrictions and coil cleanliness
If safety switches trip: Check for drain blockages or system pressure problems

You'll know you're done when: System is fully tested and comprehensive maintenance program is established

• System startup sequence tested and operating properly
• All components tested under load with normal operation verified
• Performance measurements recorded and within specifications
• Safety and control systems tested and responding correctly
• Preventive maintenance schedule created with specific tasks and timing

Ready for next step? You've completed comprehensive system testing and established a maintenance program to keep your AC running efficiently.

🏆 Final Result

You Should Now Have: A fully diagnosed and repaired AC system with comprehensive maintenance program and professional-level troubleshooting skills

Your AC system should now be operating at optimal performance levels with all components functioning properly. You've completed a systematic diagnostic process that identified and resolved issues using professional techniques. The temperature split should be 15-20°F, all motor amp draws should be within specifications, and the system should cycle properly without short cycling or continuous operation.

You now have a comprehensive preventive maintenance schedule that will keep your system running efficiently:

Monthly Tasks:

• Air filter inspection and replacement as needed
• Condensate drain line inspection for blockages
• Outdoor unit debris removal and clearance verification

Seasonal Tasks:

• Condenser coil cleaning and fin straightening
• Electrical connection inspection and tightening
• Refrigerant system visual inspection for leaks

You've learned to use professional diagnostic tools and techniques including:

• Multimeter testing for electrical components
• Capacitor testing and replacement procedures
• Contactor diagnosis and replacement techniques
• Refrigerant system analysis and leak detection

You now have a systematic approach to future AC problems with documented baseline performance measurements for comparison. Your maintenance log will help track system performance over time and identify developing issues before they become major problems.

Next Steps: Monitor system performance monthly, follow your established maintenance schedule, and contact EPA certified professionals for refrigerant service, major component replacement, or when diagnostic results indicate problems beyond your skill level. Your comprehensive documentation will help professionals quickly understand your system's history and current condition.