Why does my furnace or AC unit electrical breaker keep tripping?

Although your furnace and AC may use natural gas, electricity, propane or oil to heat and cool your home, it needs a good dose of electricity to power all of its electrical components. Some of the largest parts in your furnace and AC that use electricity include the blower motor, AC compressor, circuit board, as well as the gas valve. If you have an older furnace, it may utilize a standing pilot light instead of an electronic ignition source.


The most common cause for your furnace or AC to trip your circuit breaker is your blower motor overworking itself. The blower motor can begin to overwork itself when air flow to the motor becomes restricted. One of the largest causes of this is a dirty air filter. If you haven’t changed your filter in a while, be sure to check to make sure it is not dirty.

Here are some FAQs to consider

Your HVAC system may keep tripping the circuit breaker because:
  • Your air filters are clogged.
  • Your HVAC system has a refrigerant leak.
  • Your HVAC’s capacitor or motor is broken.
  • Your HVAC system’s wiring is loose or worn out.
If your HVAC system keeps tripping the circuit breaker, you should identify what issue is causing it and have it addressed right away. Allowing the process to persist can pose a threat to the operation of your HVAC system as well as lead to further damage. Call us today to get your HVAC system repaired.
Some things that may cause a furnace to not turn on include:
  • The air filters are dirty or clogged.
  • The thermostat is not set correctly.
  • The ignitor sensor is dirty.
Sometimes, the reason behind your furnace not starting is simple and easy to fix. Although, other times it may require a bigger repair. If your furnace is not kicking on and you have determined it is not due to one of the issues above, you should have an HVAC technician repair your furnace. Contact us today to have your furnace repaired.
Yes, a bad thermostat can cause your furnace not to work. When your thermostat is unable to properly register the temperature in your home, it fails to communicate with your furnace to turn it on. If you believe your thermostat is the reason your furnace is not working, you should check the power supply to the thermostat and inside the thermostat to check for dirt, dust, loose screws or loose wires. To get your furnace working again, call Sears Heating & Cooling today.

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