temp switch TCO ?

The neon light whot come on, I have tested the shower and the 2 switches witch do the hot and very hot water have 4Kohms closed and because of this there is no v at the elements.Can thes switch be replaced if so do i need to strip the whole shower apart to do this.
Asked 12 years ago by Anonymous

I think you may have a faulty Thermal Cut Out


A faulty TCO will have no continuity across the two terminals (The black thing on top of the heating tank)

Therefore a good TCO will have power at both connections and a faulty TCO will have power at only one.

(The function of the TCO is, if the water over heats it cuts the power off to the elements until the water cools, this can take up to 15mins)

See Video.

http://www.youtube.com/user/showerdoc#p/u/2/_zi8JbEMYMs

 

When fitting a new TCO listen to the shower, after it has completed its first on/off cycle, if when it is switched off you hear it continuing to heat (Noise like a kettle starting to boil) this will mean that there is a switch or a relay that is stuck in the on position, this is keeping an element energised and this is probably what caused the original TCO to fail.

If this is the case replace the faulty switch or relay and make sure that you switch the shower off at the isolating switch when the shower is not in use or this will cause the new TCO to fail.

 

 

Answered 12 years ago by Anonymous

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