The short answer
Why Turning off the Heater Is Risky
When you turn off the heater in winter, indoor temperatures can drop to match the outdoors. That cold air makes pipes more likely to freeze and burst, which can release gallons of water into your home. Even if pipes don't freeze, cold surfaces cause condensation, which can lead to damp spots and mold growth over time.
Your home's structure and belongings absorb moisture from the air. Without heat, that moisture stays put, creating conditions for wood rot and musty odors. If you plan to leave the heater off for days, you are gambling with your home's safety. Wet winters in many regions bring high indoor humidity, which raises the risk of condensation and mold.
What Happens to Pipes and Moisture
Water expands when it freezes, and that expansion can crack metal or plastic pipes. A single burst pipe can flood a room, soak drywall, and ruin flooring. Even without a burst, cold pipes attract condensation, which drips onto surfaces and creates hidden moisture in walls and under floors.
Moisture that stays in your home also encourages mold, which can be a health concern. If you notice musty smells or visible mold, you need professional help to dry out the structure and remove contaminated materials. Acting quickly can limit the damage and reduce the cost of repairs.
Frozen pipes can burst and cause flooding
Condensation forms on cold surfaces and soaks materials
Mold can grow within 24 to 48 hours in damp conditions
Wood floors and drywall can warp and rot
Hidden moisture can lead to structural damage over time
How to Protect Your Home If You Turn It Off
If you decide to leave the heater off, take precautions. Shut off the main water supply and drain all pipes by opening faucets. This removes water that could freeze and burst. Also, leave cabinet doors open under sinks so warm air can reach pipes, and consider wrapping exposed pipes with insulation.
You can also set the thermostat to a low temperature, like 50 degrees, instead of turning it off completely. This keeps the air just warm enough to prevent freezing while saving energy. If you leave for a long time, ask someone to check your home regularly for signs of leaks or freezing.
Shut off the main water supply and drain pipes
Leave faucets dripping to keep water moving
Open cabinet doors to let warm air reach pipes
Wrap pipes in insulation or heat tape
Set thermostat to a low but safe temperature
Have someone inspect your home while you are away
What to Do If You Get Water Damage
If a pipe bursts or you discover water damage, act quickly. Turn off the water supply to stop the flow. Then remove any standing water with towels or a wet vacuum. The sooner you start drying, the less chance mold has to take hold.
Water damage can affect more than what you see. It can soak into drywall, insulation, and flooring, requiring professional drying and removal. If you have significant damage, consider contacting local water damage pros for an inspection. They can map moisture levels and decide what needs to be removed or dried.
If you live in Redmond, keep your shutoff valve location written down. That way you can find it fast in an emergency. Also, check your insurance policy to understand what is covered. Policies vary, and your insurer decides what is covered.
When to Call in the Pros
Some water damage is easy to handle yourself, but hidden moisture is not. If you notice a musty smell, see water stains on ceilings or walls, or feel dampness in carpets, you may have a deeper problem. Professional moisture mapping and structural drying can find and fix issues that are not visible.
Water damage does not wait
Water keeps spreading into floors and walls, so it is worth acting early. Calls are answered 24/7.
Call Now (425) 407-5186Frequently asked questions
What is the lowest safe temperature to keep my home in winter?
A common recommendation is 50 degrees Fahrenheit. This keeps pipes from freezing while using less energy. If you have pets or plants, you may need a higher setting. Always check your specific situation, such as older pipes or uninsulated areas, and adjust accordingly.
How can I tell if my pipes are about to freeze?
You might hear a trickling or rattling sound when you turn on a faucet, or the water flow becomes slow. Also, if the temperature drops below freezing for several hours, that is a risk. Feel pipes in unheated areas; if they are ice-cold to the touch, take action to warm them.
What should I do immediately after a pipe bursts?
Shut off the main water valve to stop the flooding. Then turn off the electricity in affected areas if it is safe. Remove standing water and start drying with fans or dehumidifiers. If the damage is extensive, contact a water damage professional for help with extraction and drying.