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dry run with dryer

dry run with dryer

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Thread: dry run with dryer

  1. #1
    Join Date
    May 2013
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    1,481

    Default dry run with dryer

    I think we have discussed this before, but how much percentage over rated capacity is normal for an empty dryer to heat?

    I know they will get hotter than called for on the working/cycling stat, but I tried one today that shows a stat rated at 155-25. If the 25 means it can go that much either way, I am okay. This thing got to almost 180 degrees before kicking off. I would expect somewhere around 155 and 130 with a little either way when empty.

    Whlpl model - tedx64jq1
    Working/cycling stat pn shows to be 3387134
    Last edited by jeff1; 01-08-2014 at 09:32 PM.

  2. #2
    Join Date
    Feb 2012
    Location
    Canada
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    Default

    This differential may be displayed on the part and could be 10-40? or more. If displayed on the part, it would look something like L150-20, the 20 being the differential between cut out and cut in.

    140-160 would be a 20? differential.
    Heating up to 180? is too hot!

    dry run with dryer-cycling-thermostat-3387134-00693206-jpg Dryer cycling thermostat with internal bias heater, L155-25 Manufacturer Number 3387134

    jeff.
    http://www.applianceaid.com/
    Appliance Repair Aid

  3. #3

    Default

    That's not how it works. The L155-25F means the thermostat opens at 155? and closes at 130?.

  4. #4
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    Default

    The L155-25F means the thermostat opens at 155? and closes at 130?
    That's what I said.

    jeff.
    http://www.applianceaid.com/
    Appliance Repair Aid

  5. #5

    Default

    I thought your answer was confusing. For a thermostat marked L155-25 he asked, "If the 25 means it can go that much either way". You didn't answer that and gave an example of an L150-20 stating that the 20 was the differential and then stated 140-160 would be a 20? differential implying that the L150 would go between 140-160 for the 20? differential.

    Just wanted to make it clear that the 155 is the cut out temp and the -25 would give the cut in temp of 130.

  6. #6
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    Default

    The L155-25F means the thermostat opens at 155? and closes at 130?
    That's the way I thought I remembered from years ago. But, I think I have been told lately that they will get a little hotter when empty. I never understood this statement. 155 degrees is 155 degrees in my mind. I can understand a little fluctuation but as much not as some I have seen.

    Anyway, I will change the stat on this one and see if I can get that temp down.

    Can the cycling stat ohm within specs and still be bad? If that is the problem?
    Last edited by Boman; 01-09-2014 at 10:45 AM.

  7. #7

    Default

    You need to do a controlled test on the thermostat on a hot plate to determine if it is operating within specs. It should operate within 5% of rated temperature. A static test with ohmmeter at room temperature only tells you if the switch is closed as it should be. How and where are you testing the dryer temperature?

  8. #8
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    Default

    Can the cycling stat ohm within specs and still be bad? If that is the problem?
    Of course it can be bad....that is a part that is electrical and mechanical....electrical can ohm ok all day but the mechanical part of the thermostat can fail and be bad.

    I thought your answer was confusing.
    I can see that. The 140-160?F was simply an example of what a 20? differencial was.

    That's not how it works
    This differential may be displayed on the part and could be 10-40? or more. If displayed on the part, it would look something like L150-20, the 20 being the differential between cut out and cut in.
    This IS how it works.
    With a difference of opinion it is best not to make a blanket statement "That's not how it works"

    jeff.
    http://www.applianceaid.com/
    Appliance Repair Aid

  9. #9
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    Default

    I tested inside my shop. Ambient temp around 60 degrees. I test with a pocket thermometer in the exhaust. I haven't seen my ho tplate in years. Does an oven fluctuate too much to use for this purpose?

  10. #10
    Join Date
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    Canada
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    Default

    I haven't seen my ho tplate in years.
    Some electric frying pans had a temp control you can use to help test at certain temps.

    Does an oven fluctuate too much to use for this purpose?
    Probably. Plastic body part wouldn't take the heat either.

    jeff.
    http://www.applianceaid.com/
    Appliance Repair Aid

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