Should I turn off the water heater during freeze?

Author: Bianka Stroman  |  Last update: Friday, December 26, 2025

Frozen pipes can cause serious water damage to your home. The warm water your heater produces will continue circulating your system and prevent the leaks, cracks, and burst pipes that freezing can cause. Leave your water heater on to avoid frozen pipes and accompanying damage to your property.

What to do with water heater during freeze?

If the issue is isolated to the water heater, turn off the power. Next, turn off the gas and water shutoff valves and disconnect the unit. Relocate it to a warm room or use a space heater if you can't move the water heater away from a chilly area. Once the unit starts warming up, the ice should melt.

Is it better to shut off the water during the freeze?

Yes. Turn off the main until everything is thawed. That way, if a pipe bursts from freezing you don't have a constant source of water flow to the break.

Should I leave my heater on during a freeze?

Typically, whenever the outside temperatures go below 40 degrees, you must keep your heating system running to prevent the pipes from freezing (and then bursting after they thaw).

Should I run hot water if pipes are frozen?

Probably the most popular and safest pipe-thawing option is to use hot water.

What should I do with a water heater when I go on vacation?

Do I need to turn off the water heater if pipes freeze?

Frozen pipes can cut off your home's water supply and cause damaging leaks. In many cases, the help of a plumber is needed to resolve the problem. To prevent further damage, it is generally recommended that you turn off your main water supply valve and your water heater until repairs have been made.

Should I turn my faucet on if my pipes are frozen?

Keep the faucet open. As you treat the frozen pipe and the frozen area begins to melt, water will begin to flow through the frozen area. Running water through the pipe will help melt ice in the pipe.

Can your pipes freeze if heat is off?

Keep the heat on in your home even if you are on vacation or away for an extended time. Frequently pipes freeze and burst while homeowners are away on vacation and have turned off their heat.

What happens if you leave the water heater on?

prolonged usage may cause the geyser's heating element to overheat, potentially damaging the appliance. This was the main reason why the appliance burst. Other things that can happen are: Continuous operation results in unnecessary energy consumption, contributing to higher utility bills.

What not to do when your water pipes freeze?

Don't ever try to thaw pipes with a:
  1. Blowtorch.
  2. Gas heater.
  3. Kerosene heater.
  4. Propane heater.
  5. Other open flame appliances.
  6. Any device near insulation.
  7. Electric device with extension cord.
  8. Electric heater, blow dryer, or other device near water.

Is it okay to turn off the water heater in winter?

Your Pipes Could Freeze and Burst

If you turn off your water heater, your interior temperature will drop, leaving the water in your pipes susceptible to freezing. When the water in your pipes freezes, it expands and becomes ice. That ice creates blockages in your pipes and causes pressure to build.

Is it better to drip faucets or shut off water?

Overall, it's best that you take heed and drip your faucets when temperatures dip below freezing. A simple trickle of hot and/or cold water—both from faucets inside and outside the home—can prevent you from having to deal with a much larger issue (and bill!) in the long run.

Will a water heater freeze if turned off?

However, if your water heater is off when the temperature outside drops below 32 degrees Fahrenheit, it may freeze within a couple of hours. This typically happens during power outages when there is no heat running through your home to keep your plumbing warm. Older heaters that can't run optimally may also freeze.

Will a water heater burst if it freezes?

Any water heater can freeze if water is left inside it

Tank water heaters usually hold between 40 and 55 gallons and can require electricity. So when the power goes out in freezing temperatures, the water eventually can freeze, expand and burst the storage tank.

How to keep a hot water heater from freezing in the garage?

Maintain a Minimum Temperature: Use a space heater to keep the garage temperature above freezing, or install a heat lamp near the water heater. This can provide enough warmth to prevent freezing. Regular Maintenance: Ensure your water heater is in good working condition.

How to protect a water heater in freezing weather?

Choosing a sheltered exterior location can also help prevent freezing issues. If possible, install your outdoor tankless water heater where it will be sheltered from wind, or build an enclosure that blocks the wind. Install a pipe cover to conceal and protect the gas, water and power connections.

When should I turn off the water heater?

However, there are two key instances when you should turn it off: The Tank Is Empty or Nearly Empty: If the water heater tank is empty and won't be refilled for an extended time, the heating elements (for electric water heaters) or the burner (for gas models) could overheat.

How do you prepare a hot water heater for freezing?

Insulate the Tank and Exposed Pipes

You should also insulate cold water pipes if there's a threat of the home freezing. For older or less insulated water heaters, consider adding a water heater blanket or additional insulation. This can help retain heat and reduce energy consumption.

Do you need to run hot water to keep pipes from freezing?

Running water through the pipe helps prevent it from freezing because the temperature of the water is above freezing. It also is recommended to turn on both hot and cold faucets near outside walls to allow a small trickle of water to run during the night and, if not used often, during extremely cold days as well.

Should you open an attic door during a freeze?

'Although it might not seem like a big deal, leaving your attic door or hatch open during freezing weather can help to prevent a whole host of home maintenance issues, such as preventing ice dams on roofs, frozen pipes, and mold growth,' begins Jay Sanders, contractor and owner of Castle Dream Construction.

What pipes are most likely to freeze in a house?

Pipes That Freeze Frequently
  • Outdoor Water Lines.
  • Basement Pipes.
  • Attic Plumbing.
  • Pipes In Your Garage.
  • Kitchen Cabinet Piping.
  • Exterior Wall Pipes.

Will frozen pipes burst if water is turned off?

Even if you have shut off the main water supply, a pipe can be at risk for damage. Specifically, if the temperature drops and the pipe has become frozen, it more than likely could become exposed to ice.

What not to do if your pipes freeze?

Apply heat to or around the pipe using a hair dryer. Keep all sources of heat away from flammable materials and do not use any open flame devices, kerosene heaters, or blow torches. Also, do not use devices that will cause the melted ice to boil, as that can also cause pipes to break.

Can pipes unfreeze without bursting?

And once the temperature outside dips below 32F, unprotected pipes are at a greater risk of freezing and potentially bursting. That said, it's still possible for your pipes to thaw without bursting. The key is to release the pressure and allow the pipes to thaw slowly.

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