First i don t know what climate you live in but yes without additional heating you risk water lines freezing in an unheated space.
Washing machine in unheated garage.
Frankly installing a washing machine in a cold unheated garage was not a great idea.
I think you need to think about ways to insulate and heat that area more permanently.
In an unheated garage for instance paint can.
In areas with below freezing winter temperatures the washer may suffer damage when hoses or valves freeze and burst.
An unheated garage isn t the ideal location for a washing machine but it sometimes offers the only available space for it.
Install or store where it will not be exposed to temperatures below freezing or exposed to the weather which could cause permanent damage and invalidate the warranty.
Washers generally require a minimum of service however winterizing can prolong the life of your appliance.
However a garage is not a good place to install a washing machine.
Damp garages could cause tin cans to rust while a hot garage that exceeds more than 85 degrees will increase the risk of spoiled canned food.
There are a few very real deterrents to moving your washer and dryer to your garage.
Sometimes it s just necessary.
Also there is still water inside the washing machine itself that can freeze.
A garage is usually less insulated than the rest of the house and you ll need to consider this factor if you live in an area that experiences long cold winters.
Is is acceptable to store a washer in an unheated location if the unit is winterized using the instructions above.
This primarily applies if you keep your washer in an unheated part of the house the basement bonus room or garage for example.
There are several downsides to doing so.
Many washing machines can be found in a garage including my own.
Take proper precautions to ensure your pipes don t freeze in cold weather.