How Do I Reset My AC Compressor?
To reset your AC compressor, turn the thermostat off, shut off power to the air conditioner at the breaker and outdoor disconnect (if your system has one), wait at least 30 minutes, then restore power and turn the thermostat back to cool. If the system trips again, makes unusual sounds, or will not cool, still, stop and call an AC professional.
That 30-minute wait can feel long when your house is heating up, especially during a Nevada or Utah summer. But it gives the system time to settle before you ask the compressor to start again. For a broader reset walkthrough, YES! also has a full guide on how to reset an air conditioning unit.
AC Compressor Reset at a Glance
Question | Quick Answer |
|---|---|
Can you reset an AC compressor? | Sometimes. A reset may help after a power interruption, thermostat issue, or minor system fault. |
How long should you wait before restarting? | Wait at least 30 minutes before turning the system back on. |
Should you reset it more than once? | No. If the breaker trips again or the system still will not run, call for service. |
Is the compressor the same as the whole AC unit? | Not exactly. The compressor is one major part of the outdoor cooling system. |
When is resetting unsafe? | Do not reset if you smell burning, see damaged wiring, hear harsh noises, or the breaker keeps tripping. |
When a Compressor Reset May Help
A reset may be worth trying if your AC stopped working after a power outage, the thermostat seems out of sync, or the outdoor unit is not starting even though the indoor system seems to be running.
It may also help after a temporary electrical interruption. Still, a reset is not a repair. It is more like giving the system a clean restart. If there is a bad capacitor, damaged wiring, low refrigerant, a failing motor, or another mechanical problem, the reset will not fix the root cause.
The Department of Energy notes that regular air conditioner maintenance, including filters, coils, fins, and refrigerant lines, is important for efficient and effective performance. If your AC keeps needing resets, there may be a deeper issue to address.
How To Reset Your AC Compressor Step-By-Step
Turn the thermostat off. Set your thermostat to the off position so the cooling system is not actively calling for air while you reset the equipment.
Turn off the AC breaker. Find the breaker labeled for your air conditioner or cooling system and switch it off. If you are unsure which breaker controls the AC, do not guess but call an experienced technician for help.
Shut off the outdoor disconnect if accessible. Many outdoor AC units have a disconnect box nearby. If yours is accessible and you know how to use it safely, turn it off as well.
Wait at least 30 minutes. This gives the compressor and internal system pressures time to settle before restart. Skipping the wait can be hard on the system, causing it to stress, which can speed wear and tear.
Restore power. Turn the outdoor disconnect back on first if you used it, then turn the AC breaker back on.
Set the thermostat to cool. Turn the thermostat back to cool and set it a few degrees below the current indoor temperature.
Listen and watch. Give the system a few minutes. The outdoor unit should start normally, and cold air should begin moving through the vents.
What To Check Before Restarting the System
Before you turn the AC back on, a quick visual check may help you avoid restarting a system that needs service instead.
Check This | What You Want To See | When To Stop |
|---|---|---|
Air filter | Filter is not packed with dust or debris. | Stop if airflow is severely restricted and you are unsure what to do. |
Outdoor unit | Unit is clear of leaves, branches, and obvious blockage. | Stop if you see damaged panels, exposed wiring, or burnt areas. |
Thermostat | Display is on and set correctly. | Stop if the thermostat is blank or not responding. |
Breaker | Breaker stays on after reset. | Stop if it trips again. |
Sounds | System starts without loud buzzing, grinding, or clicking. | Stop if the unit makes harsh or repeated electrical sounds. |
ENERGY STAR recommends inspecting, cleaning, or changing central air conditioner, furnace, or heat pump filters regularly. A dirty filter can increase energy costs and contribute to equipment problems.
When Not To Reset Your AC Compressor
Do not keep trying to reset your AC compressor if something feels off. It is better to pause than risk making the issue worse.
Call for help instead if:
The breaker trips more than once
You smell burning or see scorch marks
The outdoor unit hums but will not start
The compressor starts, then shuts off quickly
The fan is not spinning
The AC runs but the air is still warm
If you are dealing with electrical panels, outdoor disconnects, or equipment you do not recognize, it is best to step back and call a professional.
What If the Compressor Still Will Not Restart?
If the compressor will not restart after one safe reset, the issue may be more than a simple power interruption. Common possibilities include a failed capacitor, bad contactor, thermostat problem, restricted airflow, refrigerant issue, compressor damage, or wiring concern.
You do not need to know which one it is before calling. The important thing is not to keep forcing the system to run. Repeated resets can turn a small repair into an expensive one, especially when your AC is already working hard in hot weather.
When To Call YES! for AC Repair Help
Call YES! if you’re experiencing AC issues. Our knowledgeable team can help with air conditioning service, AC repair, and emergency air conditioning service when your home needs cooling help.
YES! takes care around your cooling equipment and home while troubleshooting, and our team makes sure the work area is clean before our visit is complete. Schedule online in Nevada or Utah, or call us at 844-216-9300 today.