When your AC stops providing comfort to your home and the discomfort kicks in—especially right in the middle of the hottest summer days—a broken Air Conditioner system can ruin your day. But before you go into panic mode, remember that most air conditioning problems are simple fixes.
Here’s a list of the most common reasons why your air conditioning unit is not working and what you can do to fix it.
1. Thermostat Issues
It is possible that your thermostat is preventing your air conditioning unit from functioning. If your thermostat has dead batteries, is set incorrectly, or the calibration is incorrect, the air conditioning unit may not turn on. Always check:Is it set to “Cool” mode?Is it set to “Auto”?Are the batteries good?Is the setting below room temperature?A quick fix in this area can often solve your air conditioning problem.
2. Clogged Air Filters
Dirty filters can restrict airflow. If your AC unit is running but does not cool, it could be due to a clogged air filter. A clogged air filter can cause your system to work harder, and it may even frozen evaporator coils. Change your air filters every 1—3 months.
3. Tripped Breaker or Blown Fuse
Oftentimes the issue is electrical, so check your home’s breaker panel and see if the AC breaker has tripped. If it has tripped, flip the breaker switch back on. If it continues to trip, call a licensed technician. In the meantime, do not continue to reset the breaker as it could be representative of a continual issue.
4. Dirty or Frozen Coils
Dirty evaporator or condenser coils can prohibit your air conditioner from working. Anytime the system cannot transfer heat, it may operate efficiently or at all. Cleanliness of your coils decreases the likelihood of breakdowns.
5. Low Refrigerant Levels
Low refrigerant is one of the more common causes of your air conditioner not working. This may result from a leak or poor installation. Signs of low refrigerant may include:
- Warm air from vents
- Hissing sounds
- Ice buildup on coils
Low refrigerant will need to be repaired by a professional. It cannot simply be “topped off.”
6. Duct Leaks or Blockages
The cool air could be leaking before it reaches your room. If your AC is on but the air is barely trickling out, duct leaks or ducts being blocked could be causing the issue. Duct inspections are good for identifying the problems.
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