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Touchstone Heating & Air Inc. Blog

My AC is On, But Hot Air is Coming Out of My Vents

It can come as quite a shock, especially on a hot day. “My AC is on, but hot air is coming out of my vents!” You don’t need to be an expert to know that something’s wrong, and when problems arise with your air conditioning, Gainesville FL weather can be particularly unforgiving. What causes an air conditioner to blow hot air? The obvious answer is that the thermostat hasn’t been set properly, or perhaps needs replacing. Beyond that, the possible causes grow more serious.

Air conditioning systems depend on refrigerant gas cycling through a closed system in order to function as they should. If the unit is blowing hot air (as opposed to not blowing any air at all), then the problem likely lies somewhere within this system. For instance, if the compressor is malfunctioning, it won’t be able to turn the refrigerant gas into a liquid – a vital step towards allowing it to cool the air.

The problem may also stem from a leak in the system, releasing refrigerant into the air. If too much refrigerant is lost, the process can’t work at all, and no cold air will be generated. You can spot this condition by the presence of frost on the evaporator coils: evidence of all the coldness that isn’t going into your home.

In some cases, the problem may be caused by a leak in your duct system or somewhere similar. Leaks can pull hot air into the ducts while the air conditioner is running, substituting the cold air with warm air.

Regardless of the causes, you need a trained expert to find a solution. The pros at Touchstone Heating & Air handle any problems you may have with your Gainesville FL home’s air conditioning system. Call us today to schedule service!

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