How do I get my heat back after a power outage?

Author: Juvenal Wilderman  |  Last update: Wednesday, December 10, 2025

Look to avoid heater repair, Take a look at your heating unit and look for a Reset button, often red or yellow. The reset button will reset the heater's internal circuits which may have flipped during a power surge or an extended outage. Press and hold the reset button for about five second, and release.

How do you reset the heater after a power outage?

The Furnace Needs a Rest

Simply go to your breaker box, switch the breaker off, wait 30 seconds, and turn it back on. Next, If you have a gas furnace, shut off the unit's pilot light and wait until the gas disperses. Finally, push the furnace's reset button to restore its power and operations.

Why is my heat not working after a power outage?

A power outage can sometimes cause a circuit breaker to trip, cutting off power to your furnace. Locate your electrical panel, find the breaker connected to your furnace, and check if it has tripped. If so, flip it back to the “on” position and see if your furnace starts working again.

How do I get my heating back on?

Switch the boiler off and on again

You should find the power switch close to the boiler or in an airing cupboard. Switch it off for a few seconds and then turn it back on again to see if this kickstarts your heating.

How long does it take for a heater to reset?

Either way, restarting a furnace is a relatively simple task that takes no longer than 10 minutes to complete.

Why is My Furnace Not Working After a Power Outage?

Where is the reset button on my heater?

Typically, you'll find it inside the air handler, either next to or above your furnace. In most newer systems, the button is often directly next to the blower motor, while in older systems, it may be harder to spot as it is sometimes underneath or behind the motor.

Do you have to relight a furnace after a power outage?

Homeowners will want to maintain a furnace protocol in the event of a power outage. For example, do you have to relight furnace after power outage? Yes, if your pilot light goes out, you will want to shut off the gas line and wait for power.

How do I get my heat back on?

What To Check If Your Heating System Does Not Switch On
  1. Replace the Batteries in Your Thermostat. ...
  2. Check the Settings on the Thermostat. ...
  3. Check the Circuit Breaker and Emergency Shutoff. ...
  4. Change the Air Filter. ...
  5. Cycle the Power on Your HVAC System.

Why is my heating not coming on?

The electrical wiring within the boiler may have come loose, the programming within the boiler may have malfunctioned, the cylinder thermostat may need replacing, the fan may have stopped working, the pump may have broken… The list of potential problems is almost endless.

Why won't my heat turn on in my house?

There are several reasons why your furnace may not turn on. The most common include a broken thermostat, gas line issues, clogged air filters, blocked ductwork, a tripped circuit breaker, and issues with the furnace itself.

Why wont my heating come on after a power cut?

An interruption to the power supply can reset the boiler's timer settings. This will mean that your boiler won't turn on and off at the right times. Check the time on the boiler controls to see if it is correct. You may simply need to reprogramme your boiler controls with the correct date and time.

Does a power outage affect heating?

Here is a brief breakdown: Forced Air Heating (YES)-Forced air heating is the typical heating system with ductwork and a furnace that most homes have. This type of heating system needs electricity to operate meaning that if you have a power outage, you will also lose your heat.

Why is my HVAC not working after a power outage?

Check the Circuit Breaker: The first thing to do is check your home's electrical panel to see if the AC breaker has tripped. If it has, simply reset it by flipping the switch off and then on again. If the breaker trips repeatedly, it's a sign of a more serious issue, and you should call a professional.

Why is my heat not working after power outage?

A furnace not working after a power outage may need a reset, and most modern furnaces have a yellow or red reset button. You'll need to reset your furnace's breaker first. Next, homeowners with gas furnaces should turn off the pilot light and allow the gas to disperse.

How do I get my heater to work again?

7 Basic Tips For Fixing Your Heater Like a Pro
  1. See if the thermostat is responding. ...
  2. Check the thermostat settings. ...
  3. Change the air filter. ...
  4. Check the circuit breakers. ...
  5. Check the ON/OFF switch. ...
  6. Open and securely close the furnace door. ...
  7. Check the gas valve by your furnace.

What would cause my heat not to kick on?

If your heater doesn't start, chances are the problem stems from having a dirty furnace. Having dirt on your blower motor or flamer sensor could render your furnace unable to perform. When the blower motor is too dirty, it won't pass enough cool air to the heat exchanger, leading to equipment failure.

How to reset central heating system?

Follow these instructions to reset your boiler:

First, find your boiler manual. Some boilers don't have an obvious reset button, or may have different instructions to the ones below. Find your reset button, and push it for 10 seconds. Wait 2 to 3 minutes, then turn on the heating or hot water.

What to do if you have no heating?

Check your isolator and trip switch

You'll typically find the fuse box in places like the garage, hallway, kitchen, utility room, or under the stairs. If any of the switches in your fuse box are in the 'off' position, turn them back on and try your heating again.

Do you need to reset the furnace after a power outage?

All you need to do is go over to your furnace and locate a reset button. It's typically red or yellow. If it's been tripped during an outage it will probably be raised. Make sure that you press this button down to make sure that the furnace is ready to run again.

Why is my thermostat on but no heat?

If your thermostat is fully functional and you're still unable to feel any heat coming from the vents, you may be dealing with some of these problems: Dirty evaporator coils. Clogged pipes. Full air filters.

Who to call when heat is not working?

If these steps don't resolve the problem, it's essential to call a licensed HVAC technician for professional diagnosis and repair to ensure the heating system is restored promptly and safely.

Where is the reset button on the furnace?

In most newer systems, the reset button is conveniently located near the blower motor, which makes it easy to spot and use when needed. In older systems, however, it may be more challenging to locate the reset button on your furnace, as it can sometimes be found underneath or behind the blower motor.

How do I turn the heater back on?

Relighting Pilot Lights
  1. Turn Off the Power. The first step to safely relight your furnace is to turn off the power to this heating system. ...
  2. Turn Off the Gas. Next, turn off the gas supply to the furnace. ...
  3. Wait for the Gas to Dissipate. ...
  4. Locate the Pilot Light. ...
  5. Relight the Pilot Light. ...
  6. Hold the Reset Button. ...
  7. Turn on the Furnace.

Does power outage affect heat?

When the power goes out, the electric components of your furnace won't function, which means it can't provide heat. To check if your furnace is running, look at your circuit breaker panel; if your furnace circuit is inactive, the furnace won't operate.

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