Five common failures of HVAC systems:1. Faulty wiring: Improper, haphazard or uncertified A/C wiring is dangerous and a potential fire hazard. Bad wiring often prevents the system from getting power, or can trip the circuit breaker.
2. Low refrigerant Refrigerant:
Low refrigerant may indicate a leak or problem with the refrigerant system. If your air conditioning system needs to be recharged with refrigerant, typically that means there is a leak. All refrigerant leaks should be located and repaired.
3. Outside fan is not working:
The outside fan is responsible for transferring the heat from your home to the outside air. If the fan on the outside unit doesn’t run, proper heat transfer is not taking place and the air conditioning compressor may overheat and trip the safety overload. Worse yet, it may cause internal damage to the compressor.
4. Outside unit not functional:
This typically indicates lack of power, contactor problems or even a faulty thermostat.
5. Frozen Inside coil:
A frozen coil often indicates a problem with the airflow, such as restrictions caused by dirty air filters or blocked return air ductwork. Frozen indoor coils could also be caused by low refrigerant.