I recently moved up into Northern Ontario. How can you tell if your block heater is working? I plug my car in every night when it's below -15 C. Recently there's been an extreme cold snap and it seems like even plugged in the car is struggling to start. The battery is cranking but the engine seems like it takes forever to finally get going. It does however heat up within 10 minutes or so. Yesterday in -33 I gave up on trying to start it and hitched a ride to work for fear of killing the battery.
I know the block heater won't keep the coolant hot, or even warm, just wondering if anyone else in this type of climate has experience to share. Is my block heater working just for the simple fact that it even starts in this frozen hell?