Wondering how to winterize a dishwasher? The right steps depend on where the dishwasher is installed, whether the home will stay heated, and the appliance model. A dishwasher in a heated home during a short trip usually has different needs from one in a seasonal house where pipes and the appliance may freeze.
Freezing water can damage supply lines and internal components. Do not rely on a generic online procedure: check the owner’s manual for your exact model or ask the manufacturer or an authorized appliance technician. For example, a Whirlpool dishwasher manual says to protect supply lines from freezing and to have the appliance winterized by authorized service personnel when it is stored in winter.
First decide whether winterization is needed
- The home will stay heated: If you are away for a while but the kitchen and plumbing will remain above freezing, follow the manual’s instructions for an extended period without use. You may only need ordinary cleaning and the manufacturer’s recommended shutdown steps.
- The home may lose heat: If the room, cabinet, or plumbing could reach freezing temperatures, contact the manufacturer or an authorized technician before you leave. They can tell you whether the appliance and connected plumbing need professional winterization.
- The dishwasher is being removed or stored: Ask for model-specific instructions. Draining internal components or disconnecting a built-in appliance can involve plumbing and electrical connections.
Basic preparation before an extended absence
These are general housekeeping steps, not a substitute for your model’s winterization instructions:
- Remove dishes, food scraps, and anything left in the detergent dispenser.
- Clean the filter only as described in the owner’s manual. Filter designs vary, and some parts can be damaged by force or harsh brushes.
- Wipe the tub and door edges with a soft cloth, then let the interior dry as the manufacturer recommends.
- Check the manual for instructions about leaving the door open or closed, and whether to shut off water or power during an extended absence.
- If you are concerned about freezing, call the manufacturer or a qualified technician before disconnecting anything.
Avoid these common winterizing mistakes
Do not pour automotive antifreeze into the dishwasher. Do not use a generic antifreeze or chemical unless the exact model’s manufacturer directs you to use a particular product and method. An online tip meant for a different appliance can damage seals or leave a chemical residue.
Do not assume draining the tub is enough. Water may remain in a pump, hose, or supply line even when the visible bottom of the tub looks dry. Taking off access panels or disconnecting plumbing to reach those parts may create a leak or electrical hazard.
Do not seal the door with weatherstripping or lubricate the hinges. These are not universal dishwasher winterization steps and may interfere with the door, seal, or normal operation.
Before turning it on again
Follow the manual’s restart instructions. Check around the dishwasher and under the sink for signs of a leak before starting a cycle. If the home or appliance was exposed to freezing temperatures, arrange an inspection if you see cracked parts, water damage, or loose connections. Leave the dishwasher off and contact a technician if you smell burning, see damaged wiring, or find water near an electrical connection.
For routine cleaning between seasons, see our guide to choosing a dishwasher cleaner. Cleaning products do not replace winterization, but using a cleaner according to its label can help remove normal residue and odor buildup.
How to find the right winterization instructions
Start with the model number, not a generic video. Look for a label around the inner door edge, frame, or tub; the owner’s manual can tell you the exact location. Search the manufacturer’s official support page or contact its service department. Keep the manual or instructions with the appliance information so they are easy to find when it is time to restart the dishwasher.
When reading the manual, look for sections called “vacation,” “extended time without use,” “winter storage,” “freezing,” or “moving.” These sections may give different directions because the manufacturer distinguishes an appliance left idle in a warm home from one that will be exposed to freezing conditions. Follow the directions for your precise model and situation. If the manual does not cover a cold, unheated property, ask the manufacturer before taking action.
Questions to ask the manufacturer or technician
When you call, explain whether the dishwasher is built-in or portable, whether it will remain connected, how long it will be unused, and whether the room or nearby plumbing can freeze. Ask:
- Does this model need professional winterization if the room may freeze?
- Should the water or electrical supply be turned off, and where are those shutoffs?
- Does the manufacturer specify a particular draining procedure or product?
- Should the dishwasher remain installed, or does it need to be disconnected and stored?
- What should be checked before the first cycle after storage?
Write down the answer and the name of the support representative or service company. If the advice involves disconnecting plumbing, opening an electrical compartment, or accessing internal parts, arrange qualified service rather than improvising.
Think about the plumbing around the dishwasher
Winter damage can involve the home’s water supply or drain plumbing as well as the appliance. A dishwasher may sit inside a cabinet that gets colder than the rest of the kitchen, or a pipe may pass through an exterior wall. Heating the living area does not always guarantee that every line stays warm. If the home is seasonal, has had frozen pipes before, or will be left without heat, ask a plumber or appliance technician to assess the full setup.
Do not aim a space heater into a cabinet or leave a portable heater unattended to protect a line. Follow local safety guidance for the home’s heating system and ask a qualified professional about reliable freeze protection. If water is shut off to the property, confirm what that means for the dishwasher and any connected appliances before leaving.
A practical checklist before you leave
Once you have model-specific instructions, use a short checklist so the same steps are followed each time:
- Record the model number and keep the manufacturer’s winter instructions nearby.
- Remove dishes and food residue; clean the filter only as the manual directs.
- Follow the manual about water, power, and the door position.
- Confirm whether the room, cabinet, and nearby pipes will remain above freezing.
- Book authorized service if the instructions call for internal draining or winterization.
- Leave a note for anyone returning to the property that describes the restart steps.
Do not rely on memory for a multi-step procedure, and do not mix recommendations from different brands. Even models that look similar may have different pumps, hoses, and instructions.
After winter: inspect before the first wash
When the dishwasher is ready to return to service, follow the manufacturer’s startup directions. Look around the unit and under the sink for dampness, cracked hoses, or signs of a leak. Restore supplies only as instructed. If the manual calls for a short test cycle, stay nearby and check the area while it runs. Stop the cycle if you see water escaping, hear an unusual sound, or notice an electrical smell.
If the appliance was exposed to freezing weather, do not assume that a successful first fill means every connection is sound. A slow leak may show up later. Check again after the cycle and over the next day. If you find moisture, shut the dishwasher off using the designated controls and contact a technician or plumber, depending on where the leak appears.
For normal care, our guide to dishwasher cleaners covers routine residue and odor buildup. Cleaning the tub can help with maintenance, but it cannot protect hoses or pumps from freezing.
Frequently asked questions
Should I use antifreeze in my dishwasher?
Only if the manufacturer’s instructions for your exact model specify a product and procedure. Never use automotive antifreeze or assume that a method for an RV, washing machine, or another dishwasher applies to yours.
Should I turn off the water and power?
Follow the manual for the appliance and the conditions at your property. If freezing is possible, ask the manufacturer or an authorized technician what needs to be shut off and how to protect the plumbing.
Can I winterize a built-in dishwasher myself?
You can handle ordinary cleaning described in the manual, but internal draining or disconnecting plumbing may require service. Get model-specific instructions before working behind panels or under the appliance.
What if I only leave for a few weeks?
If the home will remain heated and there is no risk of freezing, use the manual’s extended-absence advice. The key question is whether the dishwasher and nearby water lines could be exposed to freezing temperatures.
