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Whirlpool Dryer LET7848A - no HIGH heat

My Whirlpool Dryer model LET7848A works fine, except it has no heat when on HIGH setting. Low and Medium work fine. I'm thinking a bad switch or broken wire, maybe. Any ideas?

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  • civilian Sep 21, 2008

    Update: I have the dryer open. No obvious bad connections. Lint exhaust path not blocked. Heating element has continuity. Temerature selector switch gives three different resistance readings (High=infinity, Med=approx 500 ohms, Low=approx 5500 ohms). Tested three breakers, all had continuity. What now?

  • civilian Sep 21, 2008

    Solution #1 did not solve this. I disassembled and inspected the heating coils. No breaks or shorts. Electrical continuity close to zero ohms. I'm beginning to think the problem is in the control circuit board.

  • civilian Sep 21, 2008

    Still seeking a solution. I have tested the breakers, the heat select switch, and the heating coils. Any more suggestions?

  • civilian Sep 21, 2008

    Scott Ellin's solution ("..submit a warranty claim...") did not help at all. Is there anyone out there that actually knows something about dryers?

  • civilian Sep 22, 2008

    I keep receiving lame suggestions that mean nothing. The last one was "try to use the tester to check the wire if it is ok
    or check the switch or replaced the switch." What does that even mean? If anyone out there can actually write a proper English sentence, please help. Others, please refrain from commenting. Thanks.

  • civilian Sep 23, 2008

    I have received nothing but ridiculous advice. The lat one was "u have to go with a washing mashine repair." How does this help me? If I wanted to have someone else fix this, I would not use this forum. Please, if you don't have anything helpful to say, don't comment!

  • civilian Sep 24, 2008

    This seems like a reasonable solution. I will try this and see if it helps.

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Have a solid state resistor for each heat setting you have a infinite ohm setting on high this tells the main board that you have an overload and therefore your high setting will not work. it's obvious that you know how to solder on a circuit board so just replace the resistor on the high temp path. your values are in increments of 10 so your high setting should register 50 ohms of resistance. this should solve the problem. please rate the solution........thanks

Posted on Sep 23, 2008

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U have to go with a washing mashine repair
or visit
www.repairclinic.com

Posted on Sep 22, 2008

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Check the thermal fuse on top of the heater housing, make sure you take 1 wire off of it, and check it on ohms..else change ur fuse

Posted on Sep 22, 2008

  • mohammed marika thambi
    mohammed marika thambi Sep 22, 2008

    The moisture sensor's second wire(if necessary) is provided I would assume

    by it being grounded to the chassis. A common problem with this dryer is

    the moisture sensor becoming covered with a waxy substance from the use of

    dryer sheets. It then doesn't sense the moisture in the clothes and the

    dryer goes into cool down phase. Cleaning off with alcohol solves that

    problem. I would think you could check it by checking for continuity

    between the sensor surface and that wire . Otherwise, I would be suspicious

    of one of the thermostats...the fact that it is getting some heat rules out

    the white sealed fuse..when that goes the burner won't come on at all.






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Hi!!!!!

try to use the tester to check the wire if it is ok
or check the switch or replaced the switch

Posted on Sep 21, 2008

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  • Master
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Hi there,

Thanks for your posting in FixYa.

Please do the following:

If it is under warranty then go for replace it immediately.

Hope this would help you a lot.

Dont forget to rank me up. Have a nice day.

Best of Luck & Regards

ELLIN

Posted on Sep 21, 2008

  • Puneet Jain
    Puneet Jain Sep 23, 2008

    Thanks for your reply.

    I think this part you need to replace:

    Heating element thermal cut-off (thermal fuse) 360 degrees and high-limit thermostat 250 degrees.

    It will cost upto $28. Let me know if it fix the problem.

    Dont forget to rank me up.
    Have a nice day.

    Best of Luck
    & Regards

    ELLIN

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  • Expert
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Yes the coils which heat the heater heating plates are faulty because of broken wire.
they hshould be replaced to make it work.

thanks.

Posted on Sep 21, 2008

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