What Causes an Air Conditioner to Blow Hot Air?

An air conditioner suddenly blowing hot air is no joke when the weather outside is hot, and your home is warm. Some reasons might be relatively easy to troubleshoot or see if basic adjustments can be made, while others may need the expertise of a heating and air specialist. This guide discusses possible reasons for an air conditioner to blow hot air.

One of these issues can be responsible for your air conditioner blowing out warm air. It could be a thermostat issue, an airflow problem, refrigerant issue, or an issue with your outdoor unit, electrical system or another part of your system.

The Thermostat Is Set Incorrectly

The first thing to investigate is the thermostat. If your thermostat is turned to "heat," "fan," or any other mode but "cool," your unit might not run correctly.

Make sure that the temperature setting is also below the indoor temperature. When the fan is set to "on", it might operate when the compressor is not cooling, which could cause the warm air from the vents to blow.

It's easy to check the thermostat settings before scheduling service. 

The Air Filter Is Dirty

Dirty air filter can block airflow If you have a dirty air filter, it can affect the airflow through the system. An obstructed airflow can make your system work harder to cool your home.

Limited airflow can cause other issues too such as an evaporator coil that gets too cold and freezes. When this happens, it can be difficult for the system to transfer heat properly and you'll find warm air blowing from the vents.

Test the filter periodically, and change it when required by the manufacturer, or when it is dirty.

The Outdoor Unit Is Not Operating

A/C System Consists of Indoor and Outdoor Unit If the unit turns on without the blower running, the air conditioning can still circulate the air.

This can be caused by several things: electrical issues, the capacitor not working, or the contactor not functioning. It can also be caused by the thermostat or other control panel issue.

Verify that the outdoor unit has power and that the system's circuit breaker hasn't been tripped. It is not recommended to touch any electrical parts unless you have proper training. If the outdoor unit is not running, then you need a professional to diagnose the issue. Looking for a company that handles heating and cooling? With a Furnace Repair Springfield IL company, you can ensure your HVAC is taken care of all year.

Refrigerant Levels May Be Low

Refrigerant Also Plays a Role in Cooling The system will not remove heat from the air inside your house if there is a refrigerant leak or if the system is not filled with enough refrigerant.

Other symptoms of low refrigerant could include decreased cooling, ice formation on refrigerant lines, or longer operation times.

Refrigerant issues call for professional help. Have a certified A/C technician come and have the unit tested for potential leaks and repairs.

The Evaporator Coil Is Frozen

GPG -A frozen evaporator coil will prevent your air conditioner from cooling. Factors such as low airflow, a dirty coil or problems with the refrigerant may be the cause.

The coil or refrigerant lines are covered with ice: You may observe ice accumulation on or near the indoor unit. If you leave the air conditioning system on while the coil is frozen over, you could be creating further issues.

Should ice be seen, an HVAC maintenance technician should be contacted to turn off the cooling system until the cause can be determined.

The Condenser Coil Is Dirty

The heat expelled by the air conditioning system is transferred to the outdoor condenser coil. It doesn't happen efficiently if leaves, grass, dirt and other debris has gathered around the outdoor unit.

Decreased heat transfer could increase the load on the system, and affect cooling.

Prevent all shrubs, grasses or leaves to grow within 18 inches of the outdoor unit. Keep up with the indoor cleaning and maintenance as per the model manual and if needed, have it done by a professional.

Electrical Problems Can Interrupt Cooling

The fan or compressor of the air conditioner can malfunction if there is a problem with the wiring, faulty contactor, bad capacitor, or other electrical issues.

When you experience electrical problems, it can be hard to pinpoint the cause if you don't have the right tools or experience. Don't keep resetting the breaker if it's repeatedly being tripped. If you have ongoing electrical issues, consult an electrician.

The Compressor May Have a Problem

Inside the main unit of a central air conditioning system is the compressor. The compressor is the most critical part of the entire system and helps to circulate the refrigerant through the system as well as facilitate the heat-transfer process.

Air Condition is Running, but Not Cold: Your Compressor May Have Issues If your air conditioner is on but not cooling, there may be an issue with your compressor. Your compressor can have electrical, refrigerant, overheating, or wear and tear problems.

The technician will be able to run tests on the system and find out if the compressor is at fault or another part.

When Should You Call a Professional?

If these simple checks have not rectified the situation, the issue may require a professional service call. Do not attempt to fix issues with refrigerants, electrical parts, compressors or other specialized pieces of equipment yourself.

If you are searching for AC Repair Springfield IL, it is best to find an HVAC specialist who can look at your entire system as opposed to offering to replace parts without figuring out the cause.

Final Thoughts

There can be a number of reasons why an air conditioner blows warm air, including the thermostat being set incorrectly or a dirty filter, refrigerant issues, frozen coils, electrical failure, and compressor failure. There are some simple problems that homeowners can check themselves, but other issues require a professional.

Deal with the situation soon to bring back to sit indoors and save a tiny system trouble from becoming a much bigger one, Try to get a professional fix well in advance of the time you'll need your air conditioner to work for reliable normal minutes.