Nothing’s worse than turning on your AC on a hot day only to feel warm air blasting from the vents. If your air conditioner is blowing hot air instead of cooling your home, it’s time to figure out what’s going wrong.
Some causes are simple fixes, while others might require professional help. Let’s take a look at the most surprising reasons your AC might be blowing hot air.
1. Thermostat Troubles
Before jumping to major repairs, check the thermostat. It may have accidentally been switched to “heat” mode or set to the wrong temperature. If your thermostat runs on batteries, replacing them might be all it takes to get your AC back on track.
2. Low Refrigerant Levels
Your AC needs refrigerant to absorb heat and cool your home. If there’s a leak or your system is running low, it won’t be able to cool the air effectively. Signs of low refrigerant include ice buildup on the unit, hissing sounds, or higher energy bills. Since handling refrigerant requires special training, you’ll need a professional to fix this issue.
3. Frozen Evaporator Coil
A frozen coil might seem like it would make your home colder, but the opposite happens. When the evaporator coil freezes, it can’t absorb heat, causing the AC to blow warm air. Common causes include low refrigerant levels and restricted airflow from dirty filters. If you notice ice in your system, turn it off and call a technician.
4. Compressor Malfunction
The compressor is the heart of your AC system, responsible for circulating refrigerant. If it’s damaged or malfunctioning, your AC won’t be able to cool the air. Compressor repairs can be complex, so a professional diagnosis is necessary.
5. Outdoor Unit Issues
Your AC’s outdoor unit plays a crucial role in cooling your home. If it’s covered in dirt, debris, or leaves, it won’t function efficiently. Make sure the outdoor unit has plenty of space and is clean to allow proper heat exchange.
6. Wrong AC Size
If your AC unit is too small, it might struggle to cool your home, especially during heat waves. On the other hand, an oversized unit might short cycle, shutting off before fully cooling the air. Proper sizing ensures efficient and effective cooling.
What Should You Do?
If your air conditioner is blowing hot air, try these quick fixes first:
- Check your thermostat settings and batteries.
- Replace your air filter if it’s dirty.
- Make sure the outdoor unit is clean and clear of debris.
- Look for signs of ice buildup and turn off the unit if needed.
If the issue persists, it’s best to call a professional. HELP Plumbing, Heating, Cooling, and Drains is here to diagnose and fix your AC issues so you can stay cool and comfortable. Contact us today!
