Why is AC Unit Blowing Hot Air.
There’s no greater frustration than an air conditioner blowing warm air, essentially defying its very purpose. Not only does it impact comfort, it also increases running costs. While a slight drop in air temperature can often be fixed through basic maintenance, an air conditioner blowing warm air is far more serious.
Hot air is symptomatic of deeper AC issues, which could occur at various points of the system. It’s important to find and rectify such issues as quickly as possible to avoid further damage and expense.
How AC Unit should work.
The AC unit is a marvel of design and engineering, which depends on a few key elements: compressor, refrigerant and coils. The refrigerant is compressed from gas to liquid, releasing heat onto the condenser coils, which is directed outward.
This refrigerant is then passed through the expansion valve, where lower pressure causes it to become gaseous again, drawing heat from the indoor evaporator coils. The fan blows air over these cooled coils, reducing the temperature of the room.
In order to blow cold air, all of these processes must take place properly. As AC unit ages, key components will wear and ultimately break, followed by a big drop in cooling performance.
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