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