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Old 12-01-2012, 07:34 PM   #21 (permalink)
ktmrfs
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Quote:
Originally Posted by Premis View Post
Heymccall, DP needs to pay you a salary

I ohm'd the cord like you said, both blades to ground showed infinity. Now I'm puzzled
Is that measurement with the cord still connected to the block heater element? GFCI will trip with something near 40Kohm or less resistance from hot to ground or neutral to ground. Depending on your meter range selection, "Infinity" could be anthing from 10's of ohms to megohms. If the meter is autoranging you should be ok. If it has manual ranges set it to a 100Kohm or so range and see what the reading is between hot and ground and neutral and ground. It should be over 100Kohms.

Also, is the GFCI an outlet or a breaker in the panel?? If it is an GFCI outlet, it is tripping because it sees a difference in hot and neutral current or a neutral to ground short. If it is a GFCI breaker in the panel it could be tripping because of overcurrent as well. They are a circuit breaker and GFCI. A outlet GFCI is NOT an overcurrent circuit breaker, just a GFCI.
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Old 12-01-2012, 09:01 PM   #22 (permalink)
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It's just a regular GFCI outlet, not in the fuse panel.
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Old 12-01-2012, 09:45 PM   #23 (permalink)
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I'm starting to think this may be my issue. This is the first time I have plugged in at my current home. Problem is, all my exterior outlets are GFCI. One is direct and the other is tied into the garage GFCI outlet. Would it be safe to replace the garage GFCI with a standard outlet?

The GFI is only there to protect you from getting zapped. Plug into a regular outlet, if it don't trip, replace the GFI outlet you plan on using with a non GFI outlet. GFI's suck for block heaters.
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Old 12-01-2012, 10:52 PM   #24 (permalink)
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The GFI is only there to protect you from getting zapped..
Given that most people plug/unplug block heaters in wet, soggy, slushy and otherwise damp conditions, all while standing in said moisture and providing a nice solid path to ground, that's a positive feature, not a negative one IMHO.
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Old 12-02-2012, 02:09 AM   #25 (permalink)
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Given that most people plug/unplug block heaters in wet, soggy, slushy and otherwise damp conditions, all while standing in said moisture and providing a nice solid path to ground, that's a positive feature, not a negative one IMHO.
Agreed. I feel like block heaters should work with GFCI outlets and I'm sure mine has used one before. I'm going to pull the cord tomorrow to inspect, but I think I'll be replacing the block heater. Gotta pull the water pump anyways, so might as well do it while I'm there.
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Old 12-02-2012, 09:18 AM   #26 (permalink)
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Quote:
Originally Posted by gmcmax05 View Post
The GFI is only there to protect you from getting zapped. Plug into a regular outlet, if it don't trip, replace the GFI outlet you plan on using with a non GFI outlet. GFI's suck for block heaters.
Ditto!
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Old 12-02-2012, 03:52 PM   #27 (permalink)
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Quote:
Originally Posted by gmcmax05 View Post
The GFI is only there to protect you from getting zapped. Plug into a regular outlet, if it don't trip, replace the GFI outlet you plan on using with a non GFI outlet. GFI's suck for block heaters.

the fact that it trips a GFI is an indication that there IS a fault with the block heater or the cord. Block heaters should never trip a GFI. And the fault is causing a leakage current and potiential shock hazard somewere. IMHO don't ignore the GFI trip warning.
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Old 12-02-2012, 04:10 PM   #28 (permalink)
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I just offered info on what I have found with GFI's & block heaters, do, or do not replace with regular outlet, could careless. Usually I am not standing in a puddle of water when I plug something in, especially a block heater, cause if there is water on the ground, it's not cold enough to warrant plugging in
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Old 12-02-2012, 04:15 PM   #29 (permalink)
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I found the cord and element on eBay for $6.45 or something, spicing in an extension cord is just asking for a problem if an element is bad in a water heater it will trip like your gfci is. For under $7 it seems worth the try.
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Old 12-02-2012, 04:49 PM   #30 (permalink)
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I tried replacing the GFCI outlet, I figured it was a cheap test. The block heater seems to be working. The temperature of the actual external block heater surface (measured with an infared temp gun) went from 122 to 183 in a matter of 15 seconds. That means it must be working. It is causing a fair amount of noise though. Is that normal? I don't recall hearing the noise before. Here is a video of it. You may need to crank your speakers. This is with the block heater plugged in and the truck off.


I think I will just replace it, just to be safe. I couldn't find it for $6 but I did find a heater with cord for about $60. The real PITA is actually replacing it, but I'll have the coolant drained this weekend to pull the water pump out, so i might as well do it.
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