Where is my AC reset button?
Most air conditioners do not have a single universal "reset" button. The reset process depends on the system type: window/wall units, central HVAC, or automotive A/C. In many cases, you won’t find a dedicated reset button at all; you reset by power cycling the unit or using a reset switch on an outdoor disconnect or furnace control. Here’s how to locate and use reset controls for common setups.
Window and wall-mounted air conditioners
To reset a window or wall unit, try locating any reset control on the unit or perform a safe power cycle. If your model has a recessed "Reset" button, you’ll usually find it behind a removable panel or near the power inlet. If there’s no reset button, power cycling typically reinitializes the control board.
- Unplug the unit and wait 60 seconds to discharge capacitors.
- Inspect the exterior and the front panel or near the power inlet for a recessed Reset or Test button; if found, press and hold for 3–5 seconds (or as the manual directs).
- If there is no reset button, plug the unit back in, set to cool, and see if it starts properly.
- Check your outlet and circuit breaker; a tripped GFCI or breaker can prevent startup.
- If error codes appear on the display, consult the manual for meaning and recommended steps.
If the unit still won’t reset or repeatedly trips the breaker, there may be an internal fault or capacitor issue, and it’s best to contact the manufacturer support or a technician.
Central air conditioning (furnace and outdoor condenser)
Central systems rarely have a user-accessible reset button; instead, reset is accomplished by power cycling or using the outdoor disconnect. Here’s how to safely reset a central system.
These steps cover power cycling and identifying a reset switch on the outdoor disconnect or furnace control panel.
- Turn the thermostat to off, then switch off the main power to both the outdoor condenser and the furnace at the main breaker or service disconnect.
- Wait 5–10 minutes to allow control boards to reset.
- Restore power and set the thermostat to cooling; monitor for normal operation.
- If your outdoor disconnect box has a reset button (often red), with power off, press and release it, then re-check the system.
- If a high-pressure/limit switch has tripped, you may need to address ice buildup or airflow; call a technician if you’re unsure.
If the system continues to trip breakers or fails to start after a proper reset, contact a licensed HVAC technician to diagnose electrical faults, refrigerant issues, or faulty controls.
Automotive air conditioning (car A/C)
Cars generally do not feature a user- accessible reset button for the A/C; issues are usually addressed through fuses, system diagnostics, or cycle resets in the climate control module. A simple reset can sometimes help, but more complex faults require professional service.
Use these steps to reset and troubleshoot automotive A/C issues you can safely perform on your own.
- Turn off the engine and switch off the A/C; wait 30–60 seconds, then start the engine and reselect A/C mode.
- Check for blown fuses related to the A/C or HVAC system; replace if necessary, using the vehicle’s manual for fuse locations.
- If the system still won’t engage the compressor, inspect for refrigerant leaks with a professional; do not attempt a DIY recharge unless qualified.
- If the dash shows error codes or warning lights, consult the owner's manual or dealer diagnostic tools.
Persistent issues usually indicate a fault with the compressor, pressure switch, or refrigerant, which requires a certified auto HVAC technician.
Summary
Reset buttons and reset procedures differ by system. Window/wall units often have a reset button behind a panel or use a simple power cycle; central systems reset by power cycling or using the outdoor disconnect/furnace control; cars generally lack a dedicated reset button, with troubleshooting focusing on fuses, control modules, and safe resets. If you’re unsure, consult the user manual or contact a professional for safety.
Where is the AC reset button located?
The AC reset button is typically a small, red or yellow button located on the outdoor unit near the bottom or on the side, often near the ground. If it's not visible, it may be hidden behind a service panel that requires a screwdriver to open. For window units, the reset button is usually on the control panel or near the power cord. If you cannot find a button, you will need to perform a manual reset by turning off the power to the unit at the circuit breaker.
Location by AC type
- Outdoor/Central AC unit: Look for a small, red or yellow button on the outside of the unit, near the bottom edge. If you don't see one, check behind a service panel for one that requires a screwdriver to remove.
- Window AC unit: Check the control panel or the area near where the power cord plugs in.
If you still can't find a button
- The system may not have a dedicated reset button. In this case, perform a manual reset by following these steps:
- Turn off the thermostat to the "off" setting.
- Go to your electrical panel and turn off the circuit breaker that powers the AC unit.
- Wait for about 5-30 minutes to allow the system to fully power down and reset.
- Turn the circuit breaker back on.
- Turn the thermostat back to "cool" or the desired setting.
How do I reset my AC without a reset button?
Steps to Reset Your AC Without a Reset Button
- Turn off your AC from the thermostat.
- Switch off the circuit breaker controlling the unit.
- Wait 15–20 minutes.
- Turn the breaker back on and restart your AC from the thermostat.
Do I need to reset my air conditioner?
Resetting your AC isn't a fix for everything, but it often clears minor glitches caused by power surges or outages. Think of it as giving your AC a fresh start, letting all its parts reconnect and sync properly. Common issues a reset can address include: AC won't turn on despite correct thermostat settings.
Do all outdoor AC units have a reset button?
Many modern ACs come equipped with a reset button – a little lifesaver often painted red or yellow, tucked away on the outdoor unit near the compressor. It's like hitting Ctrl+Alt+Delete on your computer, rebooting the system to clear minor glitches. But here's the catch: not every AC has one.
