Is your air conditioner blowing warm or hot air? Is it turning off and on frequently or just not working? Before calling a professional A/C repair service, try these DIY repairs.
Remember, safety first! Always turn off the power before attempting any repairs, and if in doubt, consult a professional.
6 DIY Solutions
Check the Thermostat
- Set your thermometer to Cool, instead of Auto, which will keep the unit from power cycling too frequently.
- See if the batteries need to be replaced.
Reset the Circuit Breaker
- Air conditioners share electricity with other devices. Check your circuit breaker box and flip any switches that are off.
Clean the Air Filter
- If you can’t remember the last time you changed the filter, it’s probably time to change it, and, as a general rule, you should change it at least twice a year (more if you have pets).
Clean the Condenser Coils
- The condenser coils, located outside the house, expel heat to keep the indoor unit cool. Clean any debris around the fan box outside to maintain proper function.
Open or Unblock All Registers
- Registers allow air to flow back into the system to be heated or cooled. Make sure these are open and unobstructed, especially by furniture.
Unclog the Condensate Line
- Mold, mildew, and other kinds of debris can clog the condensate line. Use a wet/dry shop vacuum to suction the line.
When to Call a Professional
While some repairs are DIY-friendly, some issues require specialized knowledge and tools.
Avoid attempting the following repairs:
- Refrigerant Leak
- Refrigerant leaks can be dangerous and require professional handling. Contact a professional immediately if you notice hissing sounds, bubbles on the A/C coil, or a chemical smell.
- Faulty Compressor
- Signs of a faulty compressor include shaking during startup, unusual noises, warm air blowing, water leakage, and frequent breaker trips.
- Electrical Issues
- If your unit behaves erratically or frequently trips the circuit breaker, turn the unit off at the circuit breaker and call a professional immediately.
- Motor Failure
- Weak airflow, strange noises, or slow/frozen fan blades indicate motor failure.
- Unknown Issue
- If you’ve tried everything and still face problems, contact professionals for a thorough inspection and a tailored solution.