top of page

Residential, Commercial, & Industrial HVAC Installation and Repair.

Temecula, CA & Surrounding Areas

Call Us Today!

Welkin Heating & Air

Your Guide to Common AC Problems and How to Fix Them

An air conditioning system is essential for maintaining a comfortable home, especially during the hot summer months. However, like any mechanical system, air conditioners can encounter problems that hinder their performance. In this guide, we'll explore some of the most common AC problems, their causes, and solutions to help you keep your home cool and comfortable.


1. AC Not Turning On

Possible Causes:

  • Thermostat Issues: If your thermostat isn’t working properly, your AC might not turn on.

  • Tripped Circuit Breaker: A tripped breaker can cut power to your AC unit.

  • Blown Fuse: A blown fuse can also prevent the AC from starting.


Solutions:

  • Check Thermostat Settings: Ensure your thermostat is set to the cooling mode and the desired temperature.

  • Reset the Circuit Breaker: Locate your electrical panel and reset the tripped breaker.

  • Replace the Fuse: If you suspect a blown fuse, replace it with a new one of the same amperage.


2. Insufficient Cooling

Possible Causes:

  • Dirty Air Filters: Clogged filters restrict airflow, reducing cooling efficiency.

  • Low Refrigerant Levels: Insufficient refrigerant can prevent the AC from cooling properly.

  • Blocked Condenser Unit: Dirt and debris around the outdoor unit can obstruct airflow.


Solutions:

  • Clean or Replace Filters: Regularly clean or replace your air filters to maintain proper airflow.

  • Check Refrigerant Levels: If refrigerant is low, you may have a leak. Contact a professional to diagnose and recharge the system.

  • Clear Debris: Keep the area around your condenser unit clean and free of obstructions.


3. AC Blowing Warm Air

Possible Causes:

  • Thermostat Issues: Incorrect thermostat settings can cause the AC to blow warm air.

  • Refrigerant Leak: A leak in the refrigerant line can lead to insufficient cooling.

  • Dirty Evaporator Coils: Dust and dirt on the coils can impede cooling efficiency.


Solutions:

  • Check Thermostat Settings: Ensure your thermostat is set to cooling mode.

  • Professional Inspection: Have a technician inspect and repair any refrigerant leaks.

  • Clean Evaporator Coils: Schedule regular maintenance to keep the coils clean.


4. Frequent Cycling

Possible Causes:

  • Oversized Unit: An AC unit that's too large for your space can cycle on and off frequently.

  • Thermostat Placement: A thermostat located near a heat source can cause short cycling.

  • Airflow Restrictions: Blocked vents or dirty filters can lead to frequent cycling.


Solutions:

  • Evaluate Unit Size: Ensure your AC unit is appropriately sized for your home.

  • Relocate Thermostat: Place the thermostat in a central location away from heat sources.

  • Unblock Vents and Replace Filters: Make sure vents are unobstructed and filters are clean.


5. Water Leaks

Possible Causes:

  • Clogged Drain Line: A clogged condensate drain line can cause water to back up and leak.

  • Improper Installation: An incorrectly installed unit can lead to water leaks.

  • Frozen Evaporator Coils: Frozen coils can cause excess water to overflow the drain pan.


Solutions:

  • Clear the Drain Line: Use a wet/dry vacuum to remove clogs from the drain line.

  • Check Installation: Ensure your AC unit is properly installed and level.

  • Defrost Coils: If the coils are frozen, turn off the unit and let them defrost before restarting.


6. Strange Noises

Possible Causes:

  • Loose Parts: Vibrating or rattling noises may indicate loose parts within the unit.

  • Fan Problems: A bent or damaged fan blade can cause loud noises.

  • Debris in the Unit: Foreign objects can become lodged in the system, causing noise.

Solutions:

  • Tighten Loose Parts: Inspect and tighten any loose screws or bolts.

  • Inspect and Replace Fan Blades: Check the fan blades for damage and replace if necessary.

  • Remove Debris: Clear any debris from the unit to prevent further noise.


Conclusion

Regular maintenance and timely repairs can prevent many common AC problems, ensuring your system runs efficiently and reliably. While some issues can be resolved with simple DIY fixes, others require professional expertise. If you encounter persistent problems or are unsure about handling repairs yourself, it’s best to contact a certified HVAC technician.


At Welkin Heating & Air, we’re committed to keeping your home comfortable with expert AC repair and maintenance services. Our experienced technicians are ready to diagnose and fix any issues, ensuring your air conditioning system operates at peak performance.

bottom of page