Block heater plugged in all night?? - Dodge Cummins Diesel Forum
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post #1 of 11 (permalink) Old 12-18-2010, 01:01 AM Thread Starter
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Block heater plugged in all night??

I hear alot of guys saying how they've put timers at the outlets that their block heaters are plugged into. I could make that work for me, but it wouldn't be as 'carefree' as most. So, my question (my concern) is, is it harmful to leave the truck plugged in for long, extended periods of time? In short, is it bad to leave the truck plugged in for 10?, 12?, 24 hours???


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post #2 of 11 (permalink) Old 12-18-2010, 01:02 AM
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i keep mine plugged in all night . never
had any issue at all ..

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post #3 of 11 (permalink) Old 12-18-2010, 01:06 AM
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I have kept mine plugged in for 3 or 4 days at a time. No problems yet.

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post #4 of 11 (permalink) Old 12-18-2010, 01:51 AM
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unless its +40c outside (risk of boiling the antifreeze), the only thing your going to hurt is your power bill

the factory block heater is appx 750watts, so its not too bad, but leaving it plugged in all the time adds up

If your set up like myself, 750w block heater/250w oil heater/250w trans heater/2x 80w battery warmers. its pretty hard on the power bill, i have it on a timer at home, but leave it plugged in at work or wherever im not paying for power LOL

My espar is on the way though... no more plugging in...

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post #5 of 11 (permalink) Old 12-18-2010, 10:09 PM
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I was a paid professional Fire fighter for 27 years and our engines and trucks were plugged in anytime they were parked in the engine house. Never a problem in all those years.

I do the same with my rig. It's plugged in whenever I know I will be using it and has been plugged since last night. Been doing that as long as I have owned it.

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post #6 of 11 (permalink) Old 12-18-2010, 10:16 PM
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Leave mine plugged in all night. And it has sat that way for two three days in a row.

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post #7 of 11 (permalink) Old 12-18-2010, 10:20 PM
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the only reason people use timers is to cut down on the power bill, it only needs a couple hours to heat up, so they set there timers just to give it enough time to warm up. I leave mine plugged in for 2 weeks straight while I am at work, because its free, at home I never plug my truck in because its not needed. I start my truck up and drive it almost everyday, and most the time I dont even wait for the grid heater to cycle unless it is in the -*.

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post #8 of 11 (permalink) Old 12-18-2010, 10:22 PM
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You could try installing a circulating tank heater (


). On nights where it drops to -20F, I'll run mine on a timer for a couple of hours. Truck starts no problem and usually starts blowing warm air within 5 minutes. They run a 1500 watt element vs the stock 750 watt element, but because the fluid actually circulates, your able to acheive the same results with this unit in a couple of hours vs pluggin your vehicle in all night with a stock unit. Makes sense to me!

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post #9 of 11 (permalink) Old 12-19-2010, 06:30 AM
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I've found that 6 hours does me as good as leaving it plugged in all night so I got a timer. For years I just plugged it in all night though. What's great about keeping it plugged in all night is that if you put your heater on the defrost mode before you shut down your windows will rarely frost up. I've had cars parked right beside my truck before and in the morning mine was totally clear while the car beside me was completely frosted over... Nice.........

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post #10 of 11 (permalink) Old 12-19-2010, 10:10 AM
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When I was driving mine as a daily driver I had it plugged in near the garage with a timer set for on at 4pm and off when I left for work at 10pm BUT I put a 110volt thermostat in series so that nothing would go on till the temp dropped below 38 degrees. saved a lot on the electrical. ED

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post #11 of 11 (permalink) Old 12-21-2010, 09:46 PM
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Quote:
Originally Posted by Ed ke6bnl View Post
When I was driving mine as a daily driver I had it plugged in near the garage with a timer set for on at 4pm and off when I left for work at 10pm BUT I put a 110volt thermostat in series so that nothing would go on till the temp dropped below 38 degrees. saved a lot on the electrical. ED

thats a dam good idea!

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