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Old 02-09-2022, 07:57 AM   #1
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Engine Block Heater

I am wanting to know how to tell if the engine block heater is working. I am taking our 2022 Accolade to the dealer this morning for a solar issue (factory installed system not working at all). Like other mornings I have had to drive it (4 times to dealer since taking delivery 7 January 2022) thatís below freezing I have plugged it in. When stationed in Alaska we had vehicles with engine block heaters and I could here things churning but I canít hear anything on the Accolade.

Thanks for any assistance.
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Old 02-09-2022, 09:19 AM   #2
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You can use a multimeter to see if there's resistance or feel the block where the heater is located. Just be careful. 1000w's will definitely be noticeable to the touch.
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Old 02-09-2022, 05:35 PM   #3
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after about 24 hours... turn your key and look at your coolant temp. You will notice
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Old 02-12-2022, 10:55 PM   #4
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Check the owners’s manual for the Cummins… IIRC engine block heaters don’t need to be used below about 0 degrees F. At least they didn’t on another modern diesel I owned.

The DEF may freeze around 12F but the engine will be OK. Coolant lines will thaw the DEF as they heat up with normal driving.
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