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  • thermal switch

    From legg@21:1/5 to All on Wed Feb 7 13:44:59 2024
    A thermal switch rated 110C/0C - does this mean freezing is
    required to rest it?

    Others rated 150C/60C will self-reset at room temp.

    RL

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  • From legg@21:1/5 to legg on Wed Feb 7 13:52:17 2024
    On Wed, 07 Feb 2024 13:44:59 -0500, legg <[email protected]> wrote:

    A thermal switch rated 110C/0C - does this mean freezing is
    required to rest it?

    Others rated 150C/60C will self-reset at room temp.

    RL

    I've tried to rest two by taking them to ~ -18C.

    One I originally tripped on the bench using a heat gun.
    The other was tripped open in a microwave oven.

    Are these supposed to reset?

    RL

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  • From legg@21:1/5 to [email protected] on Wed Feb 7 17:55:33 2024
    On Wed, 7 Feb 2024 13:35:48 -0800 (PST), "[email protected]"
    <[email protected]> wrote:

    On Wednesday, February 7, 2024 at 1:44:09?PM UTC-5, legg wrote:
    A thermal switch rated 110C/0C - does this mean freezing is
    required to rest it?

    Others rated 150C/60C will self-reset at room temp.

    RL

    They reset on their own assuming it's a thermostat and not a fuse.


    Microwave cabinet sensors swithing 12A 120VAC.

    Same symbol and part family as two other types
    used w/35C reset, measuring box wall tmps.
    They test as resetable.

    KSD100LC0
    PW4261N100

    GE doesn't issue part numbers in service manual.

    RL

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  • From legg@21:1/5 to legg on Thu Feb 8 11:02:43 2024
    On Wed, 07 Feb 2024 13:44:59 -0500, legg <[email protected]> wrote:

    A thermal switch rated 110C/0C - does this mean freezing is
    required to rest it?

    Others rated 150C/60C will self-reset at room temp.

    RL

    I opened up one of them and the construction was of a resettable
    part. I guess a zero degree reset is less reliable (or practical).

    RL

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  • From Allodoxaphobia@21:1/5 to legg on Fri Feb 9 13:50:22 2024
    On Thu, 08 Feb 2024 11:02:43 -0500, legg wrote:
    On Wed, 07 Feb 2024 13:44:59 -0500, legg <[email protected]> wrote:

    A thermal switch rated 110C/0C - does this mean freezing is
    required to rest it?

    Others rated 150C/60C will self-reset at room temp.

    I opened up one of them and the construction was of a resettable
    part. I guess a zero degree reset is less reliable (or practical).

    Maybe the "0C" (in 110C/0C) was a clumsy way to infer it's not resettable. Afterall, who has ever heard of thermal switches operating around 0C ?
    Bi-metal switches - yes.

    Jonesy
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  • From legg@21:1/5 to All on Fri Feb 9 15:41:45 2024
    On 9 Feb 2024 13:50:22 GMT, Allodoxaphobia <[email protected]>
    wrote:

    On Thu, 08 Feb 2024 11:02:43 -0500, legg wrote:
    On Wed, 07 Feb 2024 13:44:59 -0500, legg <[email protected]> wrote:

    A thermal switch rated 110C/0C - does this mean freezing is
    required to rest it?

    Others rated 150C/60C will self-reset at room temp.

    I opened up one of them and the construction was of a resettable
    part. I guess a zero degree reset is less reliable (or practical).

    Maybe the "0C" (in 110C/0C) was a clumsy way to infer it's not resettable. >Afterall, who has ever heard of thermal switches operating around 0C ? >Bi-metal switches - yes.

    Jonesy

    The active element is a bimetalic disc.

    The detection temperature is curious - locations on internal walls -
    fire detection? In series with AC line power, one before and one
    after the operating interlock.

    Resetting at zero would allow repair rather than replacement, but
    a service cycle anyways. Can you imagine advice to end user or service
    techs - 'Stick in deep freeze for 30 minutes.'

    Hardly pracyical in built-in units like the JVM1750. I suppose there's
    always freeze-spray . . . .

    HEY - THAT WORKED !

    What an idiot I am.

    RL

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