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Quick, low-risk steps

  1. Keep people away from water near electrical outlets or appliances.
  2. Check exposed pipes for cracks or bulges; if found, shut off the main water valve.
  3. If safe, open the faucet served by the frozen pipe to relieve pressure.
  4. Apply gentle heat with a hair dryer or heating pad, starting near the faucet.
  5. If you cannot thaw the pipe or suspect a burst, call a plumber immediately.

Recognizing Frozen Pipes

Frozen pipes often occur in unheated areas like basements, crawl spaces, and exterior walls. A common sign is little or no water flow from a faucet during cold weather. You might also notice frost on the outside of a pipe or unusual odors from drains.

If you see water stains, bulging, or cracks, the pipe may have already burst. In that case, do not attempt to thaw it. Shut off the main water supply and contact a plumber right away.

  • Check faucets for reduced flow or no water.
  • Look for visible frost or ice on exposed pipes.
  • Inspect for dampness, stains, or bulging.
  • Note any strange smells from drains or fixtures.

Safe Thawing Methods

If you've confirmed there are no leaks, you can try to thaw the pipe yourself. Start by opening the faucet to allow water to flow once it melts. Apply heat gently using a hair dryer, electric heating pad, or towels soaked in warm water.

Work from the faucet toward the frozen section. This allows melting water to escape. Never use a blowtorch, kerosene heater, or charcoal stove. These create fire hazards and can damage pipes.

  • Use a hair dryer on low setting, moving it back and forth.
  • Wrap pipes with an electric heating pad.
  • Apply towels soaked in warm water, replacing as they cool.
  • Keep the faucet open to let water drip out as it thaws.

When to Call a Professional

Call a licensed plumber if you cannot find the frozen area, if the pipe is inaccessible, or if you suspect a burst. Also call if water has leaked and caused damage, or if the situation involves sewage backup.

A plumber can safely thaw pipes with professional equipment and repair any damage. They can also assess your home's vulnerability to future freezes and recommend insulation or other preventive measures.

  • You cannot locate the frozen section.
  • The pipe is behind a wall or ceiling.
  • You see cracks, bulges, or water damage.
  • There is a sewage odor or backup.
  • Water is near electrical wiring or outlets.

Preventing Frozen Pipes

To prevent freezing, insulate pipes in unheated areas. Seal air leaks that let cold air reach pipes. During extreme cold, let faucets drip slightly to keep water moving.

Keep garage doors closed if there are water supply lines inside. Open kitchen and bathroom cabinet doors to allow warm air to circulate around plumbing. Set the thermostat no lower than 55°F, even when away.

  • Add pipe insulation to exposed pipes in attics and crawl spaces.
  • Seal cracks and holes in exterior walls and foundations.
  • Disconnect garden hoses and shut off outdoor faucets.
  • Let cold water drip from faucets served by exposed pipes.
  • Keep interior doors open to allow heat circulation.

Take this with you

Evidence and scope checklist

  • Is the frozen pipe accessible and free of leaks?
  • Have you shut off the main water if a burst is suspected?
  • Is there any water near electrical outlets or appliances?
  • Do you know the location of your main water shutoff valve?
  • Have you opened the faucet to relieve pressure?
  • Are you using only safe heat sources (no open flame)?
  • Is the frozen area behind a wall or ceiling?
  • Is there any sign of sewage backup?
  • Have you contacted a licensed plumber if needed?
  • Will the plumber provide a written estimate before work?
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Common questions

What homeowners ask next

Can I pour hot water on frozen pipes?

It's not recommended. Sudden temperature change can cause pipes to crack. Use gentle, gradual warming methods like a hair dryer or heating pad.

Should I turn off the water if pipes are frozen?

Only if you suspect a burst pipe or see leaks. Otherwise, keep the water on and open the faucet to relieve pressure as you thaw.

How quickly can pipes freeze?

Pipes can freeze in just a few hours when temperatures drop below 20°F, especially in uninsulated areas. Wind chill can accelerate freezing.

Evidence

Sources used for this guide

Research checked July 31, 2026

Optional next step

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