Common Air Conditioning Problems & How to Fix Them

Your air conditioning system is essential for maintaining a comfortable home, especially in Texas, where temperatures can rise quickly. However, like any other appliance, your AC unit can develop issues over time. While some problems require professional repair, others can be addressed with simple troubleshooting. Here are some of the most common air conditioning problems and how to fix them.

AC Not Blowing Cold Air

Possible Causes:

1. Thermostat settings are incorrect
2. Clogged air filters
3. Refrigerant levels are low
4. Compressor or evaporator coil issues

How to Fix It:

First, check the thermostat to ensure it is set to “cool” mode and at the desired temperature. If the settings are correct but the air isn’t cold, inspect and replace the air filter if it appears dirty. A clogged filter can restrict airflow, reducing cooling efficiency. If the issue persists, there may be a refrigerant leak or compressor problem, which requires professional service.

Weak Airflow from Vents

Possible Causes:

1. Dirty air filters
2. Blocked or leaky ductwork
3. Blower motor failure

How to Fix It:

Start by replacing the air filter. If that doesn’t resolve the problem, check for blocked or disconnected ducts, especially in attics or crawl spaces. If airflow remains weak, the blower motor may be failing, requiring an HVAC technician’s assistance.

AC Unit Won’t Turn On

Possible Causes:

1. Tripped circuit breaker
2. Faulty thermostat
3. Electrical issues

How to Fix It:

First, check the electrical panel and reset any tripped breakers. If the unit still doesn’t turn on, replace the batteries in the thermostat and verify that it’s functioning properly. If the AC remains unresponsive, an electrical issue may be the cause, and a professional technician should inspect it.

AC Is Leaking Water

Possible Causes:

1. Clogged condensate drain line
2. Frozen evaporator coil
3. Low refrigerant levels

How to Fix It:

Locate the drain line (usually near the outdoor unit) and clear any blockages with a wet/dry vacuum or a mixture of vinegar and water. If the evaporator coil is frozen, turn off the AC and allow it to defrost before restarting. Persistent leaks may indicate a refrigerant issue, which should be addressed by an HVAC expert.

AC Making Strange Noises

Possible Causes:

1. Loose or damaged components
2. Failing motor
3. Refrigerant leaks

How to Fix It:

Unusual noises like banging, squealing, or grinding usually signal a mechanical problem. Tightening loose components or lubricating moving parts can sometimes resolve the issue. However, if the noise continues, schedule an inspection to prevent further damage.

AC Freezing Up

Possible Causes:

1. Dirty air filters
2. Low refrigerant levels
3. Poor airflow

How to Fix It:

Turn off the unit to let the ice melt. Replace the air filter and check for obstructions around the vents. If the issue persists, there may be a refrigerant leak, which requires professional repair.

Bad Odors Coming from AC

Possible Causes:

1. Mold growth in ductwork
2. Dirty air filters
3. Electrical issues

How to Fix It:

Replace the air filter and clean the ducts if there’s visible mold. If the smell is burning or chemical-like, turn off the unit and call an HVAC technician immediately.

Conclusion

If your AC system is experiencing recurring issues, don’t hesitate to contact D-N-D Services. Our certified technicians provide expert HVAC repair, maintenance, and installation services in Rockwall and surrounding areas. We service all brands and models, ensuring your AC runs efficiently year-round. Need AC repair? Call D-N-D Services today!