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Common AC Problems: AC Won’t Turn On

Air conditioning units have many moving parts, so while they’re built to reliably deliver cool air throughout the warmer months, things can occasionally go wrong. When your home’s AC suddenly won’t turn on, it can be due to several potential problems.

  • Tripped circuit breakers can be caused by an electrical overload. This issue usually happens when your AC unit isn’t on a dedicated circuit breaker or if the equipment is old and drawing too much power.
  • blown fuse is a common issue, especially in older homes.
  • Clogged air filters cut off proper airflow and make the unit work harder and draw more electricity.
  • Dirty evaporator coils can make your AC unit less efficient and ultimately lead to a total breakdown.
  • Dirty condenser lines caused by mold and algae can eventually cause the unit to work much harder. The system can even break down.
  • Refrigerant leaks can cause a host of problems. This could be another reason why your air conditioner won’t turn on.
  • damaged or broken motor is generally indicated by strange noises when you try to turn the AC on.
  • malfunctioning thermostat can be a result of dead batteries, or the thermostat itself may be faulty. This issue interrupts the regulation of the AC unit’s system functioning.

A much less common reason for your AC not turning on is a wiring issue. If all other explanations are ruled out, it’s worth discussing this issue with your electrician.

How to Fix an Air Conditioner That Won’t Turn On

A homeowner can quickly fix some air conditioning problems. Others, though, require the skills and expertise of a trained and qualified HVAC technician. Here are possible fixes for when your home’s AC unit won’t turn on.

  1. First, check the thermostat batteries and, if necessary, replace them. If that’s not the problem, check the thermostat itself and make sure it’s set to the cooling mode and the correct temperature.
  2. Check for a tripped circuit breaker.
  3. Check for dirty air filters. Be sure to change your air filter every month.
  4. Cleaning dirty condenser lines is a relatively simple DIY job with a wet/dry vac. Be sure to turn off the electricity to the AC unit first.
  5. AC refrigerant leaks should be handled by a professional. It’s a good idea to inspect your air conditioner regularly for any refrigerant leaks.
  6. If your air conditioner makes unusual noises, a professional technician can usually determine the cause much more quickly and get any repairs completed in a shorter time than you could yourself.
  7. For electric control failures, it’s usually best to turn the job over to a qualified professional who can check the electrical connections to determine the issue.

The best way to keep your AC unit running as it should is to make sure it’s regularly maintained, cleaned, and inspected.

Schedule a Repair Call

If your home’s AC unit won’t turn on and you’re unable to fix the issue yourself, contact Aladdin Air Conditioning & Heating to have one of our experienced HVAC technicians fix the problem right away. You can contact us online or call us at (805) 480-0327 in Ventura or (805) 480-0327 in the San Fernando Valley.

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Office Location

1090 Lawrence Dr. #105
Newbury Park, CA 91320

License #739136


Ventura County


San Fernando Valley