At What Temperature Does Windshield Washer Fluid Freeze?

The role of cleaning your windshield falls on your windshield washer and wiper system. When your windshield is dirty, you spray windshield washer fluid onto the glass and turn on the wipers to clear the dirty fluid from your view.

The fluid that sprays from your washer nozzles comes from a reservoir mounted under the hood of your vehicle. Some vehicles equipped with a rear wiper and washer utilize the same reservoir while others have a separate one in the rear. When the washer fluid is sprayed, a pump inside the reservoir lifts the fluid to the washer nozzles and it is dispersed onto the glass.

Depending on the type of fluid that’s been put in your reservoir, it may be possible for it to freeze if the temperature drops low enough.

  • Bug wash, which is a solution that includes cleaners to assist in the removal of bug remains and other hard-to-remove windshield contaminants, freezes when exposed to any consistent temperature below freezing (32°F). Keep in mind that a morning with frost isn’t enough to freeze your washer fluid.

  • Washer fluid antifreeze is available in several formulas. Some come with freezing points of -20°F, -27°F, -40°F, or even down to -50°F. This washer fluid contains an alcohol that lowers the freezing point of the washer fluid significantly. It can be either methanol, ethanol, or ethylene glycol mixed with water.

If your washer fluid freezes, thaw it out as soon as possible. In some cases, freezing can cause the reservoir to crack or the pump to be damaged as the water expands. If this happens, your washer fluid will all leak out and your windshield washers won’t spray. Your washer fluid reservoir can’t be repaired and would have to be replaced.


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Nicholas

11 years of experience
303 reviews
Nicholas
11 years of experience
Mini Cooper Countryman - Windshield Washer Reservoir - Houston, Texas
Problem was solved in short amount of time no parts were needed.
Dodge Durango - Windshield Washer Reservoir - Houston, Texas
Excellent job...very knowledgeable....highly recommended...

Hugh

11 years of experience
33 reviews
Hugh
11 years of experience
Chrysler Sebring - Windshield Washer Reservoir - Castle Rock, Colorado
Hugh dug into my wheel well to get to the reservoir and replace it. Saw the line that goes to the spray jets disconnected. He reconnected the line and all was good. Most other mechanics would have replaced the reservoir but not Hugh. Your Mechanic has found a new returning customer.

Joseph

20 years of experience
546 reviews
Joseph
20 years of experience
Honda Civic - Windshield Washer Reservoir - Clearfield, Utah
Joseph was able to replace my washer fluid reservoir and get it in working order. He was very informative and answered every question I had. Great experience!

Ben

41 years of experience
1222 reviews
Ben
41 years of experience
Chevrolet Tahoe - Windshield Washer Reservoir - Houston, Texas
Ben is a treasure. He worked on my 35 year old Bronco "bout 5 years ago. How many are left that know and understand a carburetor fed motor ? Was lucky enough to get Ben back to service my 2001 Tahoe, 8/27/19.

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