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Air conditioner not working in a house.

Why Is My Air Conditioner Blowing Out Hot Air?

We've all been there. It's a scorching hot day, and you're relying on your air conditioner to provide some relief. But instead of cool air, your AC unit is blowing out hot air – making the indoor space even more uncomfortable. In this article, we'll explore common reasons why an air conditioner is blowing out hot air. We also provide solutions on how to fix these issues.

1. Thermostat Settings

The main reason an air conditioner blows hot air is incorrect thermostat settings. Ensure that your thermostat is set to "cool" mode and not "heat" or "fan-only." Additionally, check that the temperature is set lower than the current room temperature. Double-check your thermostat settings and adjust them as needed.

2. Dirty Air Filter

A dirty air filter can cause your air conditioner to blow hot air. It restricts airflow, causing the system to work harder and become less efficient. This can also lead to a frozen evaporator coil, further reducing cooling performance. Inspect and clean or replace your air filter as needed. The frequency will depend on factors such as the presence of pets or allergies. Generally, you should clean or replace your filter every one to three months.

3. Refrigerant Leak

Refrigerant is essential for the proper functioning of your air conditioning system. If there's a leak in the refrigerant lines, your air conditioner will struggle to cool the air. This results in your system blowing out warm air. If you suspect a refrigerant leak, contact an HVAC technician to inspect and repair the issue. Do not attempt to fix this problem yourself! Refrigerants can be hazardous to your health and the environment.

4. Blocked or Dirty Condenser Coils

The condenser coils in your outdoor unit release heat absorbed from your indoor air. If they become dirty or blocked by debris, they will struggle to release heat. This can cause your air conditioner to blow hot air. Be sure to clean and inspect your outdoor unit. Remove any debris that may be obstructing the condenser coils. For a thorough cleaning, consider hiring a professional HVAC technician.

5. Ductwork Issues

Leaks, blockages, or damage in your ductwork can cause hot air to mix with the cool air from your air conditioner. This causes your system to blow warm air out of your vents. Inspect your ductwork for any visible issues and seal any leaks with duct tape or mastic sealant. If you're unsure about the condition of your ducts or suspect a blockage, call an HVAC technician. They can do a full inspection and complete any necessary repairs.

6. Damaged or Faulty Compressor

The compressor is the heart of your air conditioning system. It circulates refrigerant and ensures proper cooling. If the compressor becomes damaged, your air conditioner cannot cool the air. An HVAC professional can diagnose and repair a damaged or faulty compressor . In some cases, it may be more cost-effective to replace the entire air conditioning system. Of course, this all depends on its age and condition.

Contact Us

If your air conditioner is blowing hot air, you need to identify and fix the underlying issue. Be sure to contact a professional HVAC technician for more complex issues. With Robert Bair, you can ensure that your air conditioner stays in working condition. We will work to provide you with cool, comfortable air when you need it most. Contact us today!