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Why Does My AC Blow Warm Air?


When problems develop with your air conditioning system, you want to have them resolved as soon as possible, rather than waiting for them to get worse and worse. This means that you should learn the warning signs that your air conditioner is in trouble to begin with. One of the most obvious, perhaps second only to a completely broken down system, is an air conditioner that is blowing warm air. It is an alarming problem, but it also may not be quite as serious as you’d first suspect.

Of course, there are some fairly serious problems that could cause an air conditioner to blow warm air as well. In this post, we’ll give you a few tips to help rule out very simple fixes. If you cannot find any such a fix, though, it is time to contact trained professionals for air conditioning repairs in Knightdale, NC. The longer that you wait to have the problem resolved, the greater the risk of serious damages to your system.

Best Case Scenarios

Let’s start off with some good news, shall we? In certain cases, you are going to be able to get your air conditioner back on track by yourself. In fact, it could be something as simple as the push of a button. We know that what we are about to tell you sounds very obvious. However, keep in mind that the “obvious” solution may not be so obvious when you are dealing with an AC blowing warm air during the hottest day of the year.

First things first, go check your thermostat. It may have accidentally been switched over to a “fan only” mode, leaving the system to blow warm, unconditioned air throughout the house. Do you use a heat pump? If so, it is even possible that someone flicked it over to its heating mode. You definitely don’t need our technicians to come out just to reset your thermostat for you.

If everything seems to be right at the thermostat, then you should pop outside to see if the outdoor unit is actually up and running. It will be audible if so. Should you find that the outdoor unit is not running, go check the circuit breaker. The compressor/condenser unit should be running on its own circuit, and its breaker may have tripped. By resetting that circuit, you may be able to get your system functioning properly once more.

Less Great Scenarios

So those are the situations that you want to find yourself. Unfortunately, you can’t always get what you want. It’s true for aging rock stars, and it’s true for you. One potentially serious issue that could be at the root of the problem is a refrigerant leak. Refrigerant evaporates in the evaporator coil to draw heat out of the air surrounding it and passing over it. If there is not enough refrigerant in the system due to leaks, that system is not going to be able to cool the air effectively.

It is also possible that the air ducts in your system are compromised. If this is the case, then your system may be pulling warm air from unconditioned spaces in the house into the air ducts. It will then distribute that warm air throughout the house. Whatever the situation, we’ll resolve it completely.

Schedule your AC repair services with Raleigh Heating & Air.

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