overheat light comming on

Why is this?
Asked 12 years ago by Anonymous

I think you may have a faulty Thermal Cut Out


A faultyTCO will have no continuity across the two terminals (The black thing on top ofthe heating tank)

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

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

See Video.

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

 

After fitting a new TCO

 

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

If this is the case replace the faulty switch or relay andmake sure that you switch the shower off at the isolating switch when theshower is not in use because this may cause the new TCO to fail.

 

 

 

Answered 12 years ago by The Shower Doctor

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