A closer look
Check the fault before restarting the equipment
An intermittent start, buzzing component or tripped breaker can point to several different issues. Controls, wiring, motors and starting components need to be considered in the context of the complete system.
Electrical compartments are not a homeowner troubleshooting area. If the breaker trips repeatedly or there is a burning smell, stop operating the system and arrange a professional assessment.
Common electrical problems
- Outdoor unit will not start, or hums but does not run
- Breaker trips when the AC starts
- Failed run or start capacitor
- Worn contactor or relay
- Failed condenser fan or blower motor
- Control board or thermostat wiring issues
What is safe for a homeowner to check
- Confirm the thermostat is on and set to Cool
- Check whether the breaker has tripped and reset it once
- Check that the outdoor disconnect is on
Please do not open the equipment
Capacitors can hold a charge even when power is off. If the breaker trips again after one reset, or you smell burning, leave the system off and call us.