A fire extinguisher canister made with water mist and pressurized water—as well as AFFF foam, FFFP foam and class K extinguishers—will freeze when left out in temperatures below 40 degrees Fahrenheit. ... Most of these are made to put out electrical fires and class A fires, such as those involving paper, wood and textiles.

Can I leave a fire extinguisher in a cold car?

Fire extinguishers can be stored horizontally if necessary and can also be stored in automobiles if the average temperature within the vehicle falls within the UL rating, which is usually -40 degrees to 120 degrees.

Can fire extinguishers be stored below freezing?

Yes. According to experts a water-based extinguisher can freeze if the temperature drops below 40° F. Also at risk of freezing are foam-based extinguishers, like Class K. Experts say AFFF foam, FFFP foam and Class K (the type you might want for a BBQ), are all at risk below 40° F.