Why won't my AC turn on after the power came back?

Most often a tripped breaker, an open float switch, or a surge-damaged capacitor or control board. Check breakers and the drain, wait five minutes, then call if it still will not start.

Should I turn my HVAC off during an outage?

Yes. Switching the thermostat off, and the breaker if you can, prevents the system from taking the hit when power is restored.

Does homeowners insurance cover surge damage to HVAC?

Many policies do. We document the failed components and the findings in writing so you have what a claim requires.

HVAC Not Working After a Power Outage

Section 1

Work through the simple causes first

Storms in Greenville and Spartanburg counties knock power out often enough that this is a seasonal call for us. Confirm the thermostat still has power and did not lose its program. Check the indoor breaker and the outdoor breaker separately, plus the pull-out disconnect at the condenser. Check the switch on the air handler, which sometimes gets bumped. Then set the thermostat and wait a full five minutes — most systems delay restart to protect the compressor.

Section 2

Surge damage we see most often

A voltage spike on restoration takes out the cheap parts first: run capacitors, contactors, transformers, and control boards. Those are same-visit repairs in most cases. On rural service drops around Enoree, Cowpens, and Gramling we see this more often, because longer lines carry bigger swings.

Section 3

The float switch nobody expects

If the system ran during a hot, humid outage or the drain backed up, a condensate float switch may have opened and locked out cooling on purpose. Clearing the drain and the pan resets it. That is a good failsafe doing its job, not a broken system.

Section 4

Preventing the next one

A whole-system surge protector at the disconnect is inexpensive compared with a control board, and it is the one upgrade we recommend proactively in storm-prone areas. We also verify that the anti-short-cycle and lockout settings on the thermostat are configured correctly, since a wrong setting can look identical to a hardware failure.

Frequently asked questions

Why won't my AC turn on after the power came back?: Most often a tripped breaker, an open float switch, or a surge-damaged capacitor or control board. Check breakers and the drain, wait five minutes, then call if it still will not start.
Should I turn my HVAC off during an outage?: Yes. Switching the thermostat off, and the breaker if you can, prevents the system from taking the hit when power is restored.
Does homeowners insurance cover surge damage to HVAC?: Many policies do. We document the failed components and the findings in writing so you have what a claim requires.

Services mentioned

AC Repair

Fast, professional diagnosis and repair of residential cooling systems.

Emergency HVAC Repair

Urgent heating and cooling failures handled with fast diagnosis and clear options.

Heating Repair

Heating and heat pump service when your system is not performing properly.

emergency HVAC repair by city

We serve Greenville County, SC and Spartanburg County, SC and Anderson County, SC and Pickens County, SC. Pick your city for local pricing, response times, and scheduling.