How to do a hard reset on a thermostat?

A hard reset, or factory reset, returns the thermostat to its original out‑of‑the‑box state, wiping custom schedules, Wi‑Fi settings, and paired devices. The exact steps depend on the brand and model, but the goal is to start fresh or recover a malfunctioning unit.

What a hard reset does and when to use it

A factory reset is a last‑resort troubleshooting step. It clears user data and network configurations, resolves persistent software glitches, and reopens the device to reconfiguration. Use it when the thermostat won’t respond, is stuck, or you’re preparing to transfer ownership.

Brand‑specific reset procedures

Nest Thermostat (Google Nest)

Use the on‑device menu to perform a factory reset. Exact wording may vary by model, but the option is typically labeled as a factory reset in Settings.

1. On the thermostat, press the ring to open Quick View.


2. Navigate to Settings, then select Reset.


3. Choose Restore Factory Settings (or All Settings on some models) and confirm.


4. Wait for the thermostat to reboot and return to default settings.

After the reset, you’ll need to reconnect to Wi‑Fi and re‑enter your preferences and schedules.

Ecobee smart thermostat

The Ecobee provides a straightforward factory reset option through its Settings menu. If you’re removing the device from your account, you may also need to do so in the Ecobee app first.

1. From the Ecobee home screen, tap the Home button and select Settings.


2. Choose Reset, then Reset to Factory Defaults (or Restore Factory Defaults).


3. Confirm the reset and allow the thermostat to reboot.


4. Reconfigure Wi‑Fi and other preferences after the reset.

Expect to re‑enter Wi‑Fi credentials and recreate schedules and preferences after the reset.

Honeywell Home thermostat

Many Honeywell models use a menu path like Settings or Menu > Reset > Restore Factory Defaults. If you can’t access the screen, a power‑cycle can be used as a last resort to reboot the unit before attempting a normal reset.

1. On the thermostat, access Menu or Settings to reach Reset options.


2. Select Restore Factory Defaults (or Reset to Factory Defaults) and confirm.


3. Allow the device to reboot completely.


4. Reconfigure Wi‑Fi and preferences after the reset.

Note: If the screen isn’t responsive, power‑cycle the thermostat by turning off the breaker or removing the fuse for about 30–60 seconds, then restore power and attempt the reset again once responsive.

Sensi by Schneider Electric

Sensi thermostats commonly offer a factory reset option in the on‑device menu or via the mobile app. The steps below reflect typical on‑device procedures.

1. Open the Settings menu on the thermostat and select Reset.


2. Choose Factory Reset (or Restore Factory Defaults) and confirm.


3. Let the thermostat reboot and reset to default settings.


4. Reconfigure Wi‑Fi and preferences after the reset.

After the reset, you’ll need to re‑add the thermostat to your account and recreate schedules.

Alternative: power cycling when the interface is inaccessible

If you’re unable to access the thermostat’s menu due to a unresponsive display or connectivity, a power cycle can reboot the device. This is not a full factory reset, but it can resolve minor freezes. Turn off power to the thermostat at the circuit breaker for 30–60 seconds, then restore power and retry the reset from the device menu if possible.

Summary

Hard resets are effective troubleshooting tools but erase personalized settings, schedules, and network connections. Before performing a factory reset, make sure you have access to your Wi‑Fi credentials and any accounts linked to the thermostat. After resetting, you’ll need to reconfigure the device from scratch, then restore schedules and routines as needed. If your model isn’t covered here or you encounter issues, consult the official manual or contact manufacturer support for model‑specific guidance.

What does pressing reset on a thermostat do?

Resetting can recalibrate the temperature sensor. Failure to Turn On HVAC System: A thermostat reset reboots its system and attempts to restart normal functioning. This resolves problems where it fails to turn on your AC, heat, or fan.

How do you know if your thermostat needs to be reset?

Your HVAC System Short Cycles or Runs Constantly
An HVAC unit should turn on and off two to three times an hour, running 15 to 20 minutes at a time. If it's turning on and off every few minutes or never stops running, there may be a thermostat calibration issue. Either way, the system will work harder than it has to.

How do you manually reset a thermostat?

To manually reset a thermostat, first try pressing a small, recessed reset button if one is available. If not, you can perform a soft reset by cutting power to the HVAC system at the circuit breaker for about 30 seconds to a minute. Some models also allow you to reset by removing and reinserting the batteries, or by using a specific button combination. 
This video demonstrates how to reset a thermostat by flipping the circuit breaker: 49sThe Flats at RidgeviewYouTube · May 3, 2020
Method 1: Using the reset button

• Turn off the power to your HVAC system. 
• Remove the thermostat's cover to access the internal components. 
• Locate the small, recessed reset button. 
• Press and hold the reset button with a paper clip for 5–10 seconds. 
• Re-install the thermostat cover, restore power, and allow the thermostat to reboot. 

Method 2: Using the circuit breaker

• Ensure the thermostat is in the "off" position. 
• Go to your home's circuit breaker box and find the breaker that controls your HVAC system. 
• Flip the breaker to the "off" position. 
• Wait for at least 30 seconds to a minute to allow the internal settings to clear. 
• Flip the breaker back to the "on" position. The thermostat will take a few minutes to start up again. 

This video demonstrates how to reset a thermostat by removing the batteries: 47sOne Hour Smart HomeYouTube · Feb 6, 2023
Method 3: Using batteries

• If your thermostat is battery-powered, remove the batteries. 
• Wait for a few minutes before reinserting them. 
• Some manufacturers suggest putting the batteries in backward for a few seconds before putting them in correctly. 
• For models that pull off the wall plate, you may need to remove it, take out the batteries, and then reinsert them correctly before clicking it back on. 

How do I fix an unresponsive thermostat?

If your thermostat is not working, check for power by resetting the circuit breaker and replacing the batteries. If it still doesn't work, clean the thermostat, check for loose wires, and ensure the settings are correct. If these steps don't fix the issue, call a professional. 
Initial troubleshooting steps 
This video demonstrates how to check the power and reset the circuit breaker for your thermostat: 56sThe Flats at RidgeviewYouTube · May 3, 2020

• Check the circuit breaker: Look for the breaker that controls your HVAC system in your home's electrical panel. If it's tripped, flip it all the way off and then back on again. 
• Replace batteries: If your thermostat uses batteries, they may be dead. Replace them with fresh ones. 
• Inspect settings: Ensure the thermostat is set to the correct mode (heat, cool, auto) and that the temperature is set appropriately. 

Deeper troubleshooting

• Clean the thermostat: Gently remove the cover and use a soft cloth or compressed air to clean away any dust or debris from the interior and contacts. 
• Check wiring: Turn off the power at the breaker first, then remove the thermostat cover and inspect the wires. Ensure they are all securely attached to the terminals. Tighten any loose screws. 
• Reset the thermostat: Some smart thermostats can be reset. Check the manufacturer's instructions for a "restart" or "factory reset" option. 
• Check safety switches: Some systems have a safety switch, often related to moisture, that can shut off the system. If you suspect this is the issue, it's best to contact a professional. 

When to call a professional
This video explains what to do if your thermostat's screen is blank: 1:00Mechanics For Non MechanicsYouTube · Jun 24, 2025

• If the circuit breaker continues to trip after being reset, there may be an electrical issue requiring an expert. 
• If you've performed the troubleshooting steps above and the thermostat still isn't working, it may need to be replaced or repaired by a professional.