‘17 Factory block heater - Dodge Cummins Diesel Forum
2013-2018 General Discussion General Chit Chat About the 2013 model year differences 6.7L 4th generation Cummins - NO ADVERTISING -

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post #1 of 22 (permalink) Old 01-16-2020, 06:19 PM Thread Starter
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‘17 Factory block heater

Last winter my factory block heater worked great, I’d plug it in at night and in thee morning it would be some what warm and there wasn’t a “wait to start” countdown. This year it’s not the same. It’s the same temp out side as last year (around -5 to -10) and I’ll have it plugged in over night and it doesn’t warm at all. I have to wait for the countdown and it’s definitely not a quick warm up.

Is there a fuse for the block heater that I could have blown at some point? I just can’t seem to find one. How else could I figure out if the block heater is dead?

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post #2 of 22 (permalink) Old 01-16-2020, 06:52 PM
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There is no fuse, cord plugs directly into the heater. Could be a bad heater, or could be that the cord isn't connected properly.

The block heater is right next to the oil filter in the side of the block if you want to check it out. Pull the air intake tract out and you'll have room to work.

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post #3 of 22 (permalink) Old 01-16-2020, 07:15 PM Thread Starter
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Ah alright, thanks for the info!
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post #4 of 22 (permalink) Old 01-16-2020, 07:37 PM
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Block heater location with cord and plastic retainer holding cord onto the heater...

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post #5 of 22 (permalink) Old 01-16-2020, 10:04 PM
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stupid question, but are you sure you have power at the outlet?
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post #6 of 22 (permalink) Old 01-16-2020, 10:11 PM
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Quote:
Originally Posted by Ltngdrvr View Post
Block heater location with cord and plastic retainer holding cord onto the heater...

See if there’s heat above ambient at that location after being plugged in. There’s also no fuse in the block heater cord.

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post #7 of 22 (permalink) Old 01-16-2020, 10:25 PM
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Get a multimeter and see if you have an open circuit. (. Put leads across both hot wires of plug ) Maybe it’s burnt out you may even get a local. Auto Parts store to check it for you for free

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post #8 of 22 (permalink) Old 01-18-2020, 09:49 PM
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I just did the multimeter test on my gasser. Test continuity, and have a look at the resistance. The thing either works or it doesnt.

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post #9 of 22 (permalink) Old 01-18-2020, 10:10 PM
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I just did the multimeter test on my gasser. Test continuity, and have a look at the resistance. The thing either works or it doesnt.
Resistance should be around 19 ohms, dependent on temperature.

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post #10 of 22 (permalink) Old 01-19-2020, 06:48 PM Thread Starter
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Thanks for help, I’ll give it a try and test it.
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post #11 of 22 (permalink) Old 01-19-2020, 07:27 PM
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You may have burnt it out by leaving it plugged in all the time.
I would use a timer, if it was mine. Just a thought!

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post #12 of 22 (permalink) Old 01-19-2020, 08:34 PM
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You may have burnt it out by leaving it plugged in all the time.
I would use a timer, if it was mine. Just a thought!
The heater by design, have a 100% duty cycle. Leave them powered up as much as desired. Standby generators have heaters running for years.

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