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My kenmore 90 series gas dryer takes 2+ hrs to dry a normal load of clothes. Cleared vent and observed flame cycling - appeared normal except that the temperature (taken with meat thermometer stuck in the vent just below the lint filter) would only go up to 100F before cutting off flame. Basically, it will cycle off and on between 80 & 100F.

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  • 3 more comments 
  • jhanak1 Jan 02, 2011

    There are four wires (2 red, 2 purple) connected to the switch. Which, do I connect together?

    Thx

  • jhanak1 Jan 02, 2011

    which wires together - there are 4; 2 red, 2 purple

    Model 110.70902990

  • jhanak1 Jan 04, 2011

    Put a clip jumper on the reds and yep the fire stayed on... Went to Sears and picked up a thermostat part #3387134 for $26.38. Two screws and four slip-on wire connections and done! Dried a big load of jeans in one cycle. Thanks!!

  • jhanak1 Jan 04, 2011

    Great service, I didn't burn up or buy any extra parts... now that's a first! Thanks for the step by step directions. I will recommend this service to my friends and coworkers.

  • jhanak1 Jan 04, 2011

    Thanks for the step by step instructions - worked without any problems. Replaced the thermostat in less than 15 minutes. Part #3387134 / $26.38 from Sears.

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What causes the dryer heating to cycle off and on is the cycling thermostat. Therefore, the cycling thermostat is malfunctioning if the dryer doesn't cycle off and on in the right temperature. Verify this by bypassing the cycling thermostat located on the blower housing alongside with the thermal fuse.
My kenmore 90 series gas - jahn27_62.jpg

Make sure power is disconnected then disconnect the cycling thermostat wires and connect them together. Insulate the connection properly then reconnect power and start the dryer. If the dryer continues to heat up and seems to overheat, the cycling thermostat is indeed malfunctioning and needs to be replaced. Do not run the dryer fro long with the cycling thermostat bypassed or else you will end blowing up the thermal fuse, thermal cut-off, and/or the high-limit thermostat.

Indicate the exact model number of the dryer should you need further assistance. You don't have to accept or rate this solution in order to post comments or information. But accepting a solution will not stop you from communicating with the expert. You can still communicate with the expert as long as you need assistance regarding the issue stated herein.

Posted on Jan 01, 2011

  • Jahn27
    Jahn27 Jan 02, 2011

    My apologies for the delayed response.

    The purple wires are for the cycling thermostat's internal bias heater while the red ones are for the contacts. Connect the red ones.

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