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