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  1. #11
    Gold Member 4get gto's Avatar
    Join Date
    Jan 2010
    Posts
    456
    Location
    N.E. Pa.
    Tractor
    Yanmar 147D with loader,Woods mow,n machine 6210 ,Sears st10,Roper rt 10

    Default Re: Block heater trips breaker

    Quote Originally Posted by crazyal View Post
    Is it a GFI breaker?
    Crystal has a point. Heck I have a coffee pot that doesn't like a GFI.

  2. #12
    New Member
    Join Date
    Sep 2017
    Posts
    11
    Location
    Littleton, MA
    Tractor
    JD 301A

    Default Re: Block heater trips breaker

    It doesn't look easy to get into the heater to replace the cord. Yes the breaker is GFI. Maybe just time to buy a new heater?

  3. #13
    Veteran Member
    Join Date
    Mar 2007
    Posts
    1,828
    Location
    Midwest
    Tractor
    Iseki TA 247. Husqvarna 54",Gravely Zero, Cub Zero,.Polaris 850 ATV's Stihl 018 026 Pro, 029, 034 Super AV, 039, 044 Mag. Stihl Pole Saw.

    Default Re: Block heater trips breaker

    I had the same issue on a newer 20 amp circuit. Even drove to my neighbors new shop. same thing. We pulled my heater out of the hose and the element was just hanging there. Installed a new heater and all is well.

  4. #14
    Silver Member
    Join Date
    May 2017
    Posts
    186
    Location
    Pictou County, NS, Canada
    Tractor
    Kioti DS4110

    Default Re: Block heater trips breaker

    Quote Originally Posted by JMarchant View Post
    It doesn't look easy to get into the heater to replace the cord. Yes the breaker is GFI. Maybe just time to buy a new heater?
    It sounds like the heater or the cord is your problem. You should be able to replace either individually. The cord can crack or split causing a trip, or the resistance wire can burn through to the outer tube also causing a trip.

  5. #15
    New Member
    Join Date
    Sep 2017
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    11
    Location
    Littleton, MA
    Tractor
    JD 301A

    Default Re: Block heater trips breaker

    I agree - thanks to all!

  6. #16
    Platinum Member
    Join Date
    Aug 2017
    Posts
    553
    Location
    Glennallen, Alaska
    Tractor
    LS XR 3135HC

    Default Re: Block heater trips breaker

    Quote Originally Posted by marchanna View Post
    I would start by plugging it into another circuit. Preferably one with a gfi. If it pops the breaker then the circuit is overloaded. If it pops the gfi then there is a short in the heater and/or it痴 power cable.
    Now that sounds Genius. Never thought to troubleshoot that way.

  7. #17
    Member
    Join Date
    Nov 2013
    Posts
    40
    Location
    Linwood, Nebraska
    Tractor
    JD 3038e

    Default Re: Block heater trips breaker

    Loose connections on outlets and circuit breakers can cause breakers to trip. Arc fault protection. All it takes is someone not tighten a connection. Since he replaced outlet and breaker, not the problem. Most likely problem is that the heater warms up, expands and and shorts out. It will test good with a meter and will only fail when it heats up. Replace the heater.

  8. #18
    Platinum Member
    Join Date
    Jun 2017
    Posts
    757
    Location
    West Chester
    Tractor
    Mahindra 2540

    Default Re: Block heater trips breaker

    Quote Originally Posted by marchanna View Post
    I would start by plugging it into another circuit. Preferably one with a gfi. If it pops the breaker then the circuit is overloaded. If it pops the gfi then there is a short in the heater and/or it痴 power cable.
    Actually, if it pops the GFCI then there is a ground fault. A short will pop the breaker.

  9. #19
    Silver Member
    Join Date
    May 2017
    Posts
    186
    Location
    Pictou County, NS, Canada
    Tractor
    Kioti DS4110

    Default Re: Block heater trips breaker

    A small short that is insufficient to pop the breaker will trip the GFI. That could be a short to neutral or a fault to ground because the gfi monitors the load across hot to neutral and trips if there is a variance. These are super sensitive and will trip before a breaker will.

    So yes, I agree you are correct, but the real world dynamics of how they work allow you to investigate as I stated.

  10. #20
    Gold Member 4get gto's Avatar
    Join Date
    Jan 2010
    Posts
    456
    Location
    N.E. Pa.
    Tractor
    Yanmar 147D with loader,Woods mow,n machine 6210 ,Sears st10,Roper rt 10

    Default Re: Block heater trips breaker

    Quote Originally Posted by CincyFlyer View Post
    Actually, if it pops the GFCI then there is a ground fault. A short will pop the breaker.
    What happens when it pops a groundfault breaker? Is it a short or ground?

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