The thermostat is often the cause of the malfunction. It is one of the first probable causes that should be checked. Make sure the thermostat is set for cooling and the temperature is set at the correct level. If this does not work, there is probably a mechanical problem in the closed circuit system of your air conditioner.
– The evaporator coil is frozen. Due to the chemical properties of the refrigerant, when heat is not absorbed by the ring over a period of time, it freezes. This can prevent hot air from being available around the coil and causes the airflow to turn off. This, in turn, can be caused by the following problems: a defective filter or cracks in the air ducts.
– Dirty air filter. Dirt and debris block the flow of warm air into the return air vent. Or something is blocking the airflow.
– The air duct has collapsed due to wear and tear. This is a less common scenario and is possible because of faulty installation and because of this, the air from the return valve cannot get into the coil.
– Dirty evaporator coil. The evaporator coil is covered with a layer of dirt through which no air can pass.
If your air conditioning system looks intact and clean, you may not have enough refrigerant in your system, so your evaporator coil is frozen.
So, your air conditioner is blowing warm air because of a refrigerant leak. When the refrigerant level is low, the chemical liquid in the coil expands, cooling it down until it freezes. As your air conditioner is a closed-loop system, if you have a low refrigerant level, it escapes from the refrigerant line through a leak. And once the coil freezes, your air conditioner is unable to extract heat from the air in your home. This causes the air conditioner to start blowing out warm air.
You shouldn’t try to fix the refrigerant leak yourself. We recommend calling a technician with SDAC Heating & Air Conditioning to look for the source of the leak and fix the problem.
The compressor may have failed, so your air conditioner is blowing hot air. This is another obvious reason why the air conditioner does not cool the air in the room but instead makes it hotter. The compressor is responsible for circulating the refrigerant through the system, where the low-pressure gas becomes the high-pressure gas in each cycle. Being such an important part of an air conditioner, the compressor requires the most energy to operate and energy costs increase over the years. Eventually, the outdated compressor may stop working, and then the air conditioner will blow warm air.
It’s worth noting that an aging compressor can also lead to the settling of contaminants in a closed circuit system, we’re talking about rust, and other metal particles. All this blocks the regular operation of the refrigerant and therefore prevents the air from cooling.
Loss of power to the outdoor unit can cause the air conditioning unit to blow warm air. With an outdated electrical system and outdoor unit, you run the risk of the air conditioner blowing warm air on hot days. This is because the old AC unit will struggle to meet your cooling needs and require too much energy to achieve its goal. The circuit will overload and if the fuse overheats (there are other possible causes) the circuit will trip. But don’t try to find the faulty wiring yourself. Instead, call in a specialist with relevant experience to help.
What you can do yourself is check if the air conditioner unit has been accidentally disconnected. This is located next to the compressor (outside) and allows you to manually switch off the AC power.
Pay attention to the listed reasons, your air conditioner may be blowing warm air due to one of them.
Don’t wait for your air conditioner to fail. If not repaired promptly, there is a very high likelihood that a lengthy comprehensive repair will be required. Even a few days without air conditioning in the summer heat in San Diego County, California, will greatly discomfort the whole family. But by calling the handypersons at SDAC Heating & Air Conditioning, you can avoid this problem.