This question is regarding Galaxy G9000 (Electric Shower) - Post 2000 - Shower Spares

galaxy g9000 esi

overheat light keeps coming on and wont heat the water, is there a way of re setting 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

 

After fitting a new TCO

 

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 because this may cause the new TCO to fail.

 

 

 

 

 

Answered 12 years ago by The Shower Doctor

Good morning,

Thank you for your email.

If the shower is only producing cold water, regardless of what setting the temperature dial is turned to, (and the overheat light is on) it is most likely that the thermal cut out on top of the heater tank assembly is at fault and is needing replaced.

If you want to be sure beyond reasonable doubt that it is the thermal cut-out at fault, then this part can be tested with a digital multimeter. Simply run a continuity test across the two terminals of the thermal cut-out. If no reading is obtained then this part will need to be replaced.

Should you require a new thermal cut out, please follow the link below to order one from our website...

http://www.showerdoc.com/shower-spares/galaxy/GALA-SG06004-Galaxy-Thermal-Cut-Out-SG06004

I hope that this helps you out.

Regards,

The Shower Doctor.

Answered 12 years ago by Anonymous

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