Why Is My Central Air Conditioner Not Cooling?
Dirty air filter
A dirty air filter reduces airflow into your AC, causing several problems:
- AC struggles to circulate enough cool air to get your home to the desired temperature (e.g. your thermostat is set on 74 your temperature never drops below 80).
- Evaporator coil (the part that cools the air) literally freezes, turning into a block of ice that blocks air, meaning that your home gets very little cooled air at all.
Dirty outside unit
Here’s how your AC cools your house: the air conditioner’s inside unit (called an evaporator) absorbs heat from your air and then transfers that heat to the outside unit (called the condenser).
But the condenser can’t dissipate heat if it’s dirty or crowded with debris. This causes your air conditioner to struggle to cool your home.
A faulty or broken condenser fan motor
If the fan motor is bad, then the outdoor unit’s fan can’t help dissipate heat, meaning that the AC can’t cool your house.
Low refrigerant charge/refrigerant leak
Refrigerant is the liquid that absorbs the heat from your air. When you don’t have enough, your AC can’t absorb enough heat to cool the air. A low refrigerant level means one thing: you have a refrigerant leak.
Signs you have a refrigerant leak include:
- Ice buildup on the refrigerant line and the outside unit
- Bubbling or hissing noise
- AC can’t cool home on especially hot days, but cools fine on cool days and at night
A bad compressor
The compressor is the heart of the AC system, circulating refrigerant like blood between the inside and outside unit. If it’s damaged, then the AC can’t cool your air.
If there’s an issue with the compressor, then it may need replacing. Unfortunately the compressor is uber expensive. So unless you have a warranty on it, you’ll probably need to replace an entire outside unit.
Contact us for the aircon service 017-881 4971.