How to Winterize a JennAir Ice Maker for Seasonal Shutdown

When to Winterize

Winterization is recommended whenever a JennAir ice maker will be unused for more than two weeks — whether due to seasonal shutdown of a vacation property, kitchen renovation, or simply reduced entertaining during cooler months. Leaving water in the system during a prolonged shutdown promotes mold growth, mineral deposits, and stale tastes that will affect the first batches of ice when you start the unit again.

Step 1: Stop Ice Production

1. Press the power button or switch the ice maker to the off position.
2. Wait for any ice currently forming on the evaporator to drop into the bin (this may take up to 15 minutes on the last cycle).
3. Remove all ice from the bin. You can transfer it to a freezer or let it melt in a sink.

Step 2: Shut Off and Disconnect the Water Supply

1. Close the water supply shut-off valve.
2. If the ice maker has a drain function or “Clean” mode, run it to pump out the water in the reservoir.
3. If there is no drain function, remove the drain cap or plug (usually at the bottom rear) and allow the water to drain into a shallow pan or towel.
4. For locations where freezing temperatures are possible (garages, unheated vacation homes), disconnect the water supply line and drain it completely to prevent the line from freezing and bursting.

Step 3: Clean and Sanitize

Never store an ice maker without cleaning it first. Follow the full cleaning and sanitizing procedure:

1. Wash the ice bin with warm soapy water, rinse, and dry completely.
2. Wipe all interior surfaces with a mild cleaning solution (baking soda and water or a commercial ice machine cleaner).
3. Rinse all surfaces thoroughly.
4. Wipe dry with a clean cloth. Do not leave any moisture inside.

Step 4: Unplug and Ventilate

1. Unplug the ice maker from the electrical outlet or turn off the breaker.
2. Leave the door or lid slightly ajar — about one inch — to allow air circulation inside the cabinet. This prevents musty odors and mold growth in the sealed, dark environment.
3. If mice or insects are a concern (seasonal properties), place a folded cloth over the opening rather than leaving it fully open.

Restarting After Shutdown

1. Remove any protective coverings and close the door.
2. Reconnect the water supply line (if disconnected) and open the shut-off valve. Check for leaks.
3. Plug the unit in and turn it on.
4. Allow the first three to four batches of ice to form and discard them — the first batches flush the system and may contain residual cleaning solution or stale water.
5. Taste-test the ice from the fourth or fifth batch before serving to guests.