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Thermal cutout

Discussion in 'Electrics UK' started by seasickstevie, 3 Nov 2015.

  1. seasickstevie

    seasickstevie

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    Immersion heater failed ... reason: 'ressetable' thermal cutout that doesn't want to reset.

    Ordering a replacement http://sinolec.co.uk/en/manual-reset-thermostat/450-thermostat-90-closed.html but the original was adhered to the metal of the heater, which would obviously give a good transfer of heat.

    I'm thinking if I just tighten up the nuts without suitable adhesive, there maybe won't be sufficient transfer of heat.

    Perhaps it's not necessary but I'd feel better if it was stuck on, like the original.

    Question is ... what's a suitable adhesive that will conduct the heat?
     
  2. Taylortwocities

    Taylortwocities

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    Never had to replace one of those, and would not want to rely on un untried/untested glue given the heat it might be subjected to.

    If I were you, I would replace the thermostat with one that includes an integrated cutout. A small change to the wiring would be needed to bypass the faulty cutout.
    One of THESE would do the job
    [​IMG]
    *note* there are different lengths, depending on length of the element.
     
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  4. cider

    cider

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  5. ericmark

    ericmark

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    Silicon heat transfer grease normally white comes in small tubes used for transistors and the like.

    In the main where there is two forms of heating a resettable type is used. If electric only then non resettable type is used. If electric only then always replace thermostat if the over temp switch fails.

    The one you show is NOT suitable. Where there is an alternative form of heating then that alternative form may have caused the emergency trip to open with no fault with main thermostat so a resettable type is used. Where it is electric only for it to fail the thermostat must be faulty and the pair should be renewed together.

    Where there is alternative forms of water heating which can result in over heating then the header tank should be made of non heat degrading material. You can get plastic tanks but they are rigid not the standard flexible type.

    This is why you must not use type linked to
     
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  7. seasickstevie

    seasickstevie

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    Thanks for that, I've not seen stats with built-in thermal cutouts before (or if I have, not realised it).

    Certainly makes sense to replace with a stat/cutout combined ... don't want to take chances.

    It's just electric heating, and the building (or refurb) is only a year old, but it's obviously failed for reason.
     
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