How do I winterize my washer if storing it during freezing weather?
Shut off both water faucets and disconnect and drain the water inlet hoses. Then put 1 quart (1 L) of R.V.-type antifreeze in the basket and run a wash cycle for about 30 seconds to mix the antifreeze with any remaining water. Finally, unplug the washer or disconnect the power. (Page 6)
From the official Whirlpool W11545828 Top Load Washing Machine manual, page 6
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