HVACopediaAll brands · Air conditioner troubleshooting
General service-call symptom list
What is going on
Possible causes and checks for: general service-call symptom list.
Likely causes
- No/insufficient cooling
- Indoor air too humid
- Stale/stuffy air
- Excessive noise
- High operating cost
- Won't start. Start with: leaks, charge, refrigerant controls, motor controls, moisture in system (ice in metering device causes gradual performance decline). p.876 [850]
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Source: General HVAC service practice — verify per model. Written in our own words; check the manual for your exact model.
For licensed technicians. Gas, electrical and refrigerant work must be done by a qualified, licensed person. Shut off power and gas before servicing, never bypass a safety control, and follow the manufacturer’s manual for the exact model; it and local codes always take priority. HVACopedia is not affiliated with any manufacturer; brand and model names only identify the equipment.