Electrical water heater problem

Tony Hillyard · Aug 9, 2017

Good morning everyone,

May I ask your advice please. I have an electrical water heater that was renewed last year. This water heater is only used occasionally during the summer. It heats the water in our guest room over our garage. The water in the heater heats up but the cut out is tripped during the night.

I have checked the wiring according to the diagram supplied with the heater. All correct. I have replaced the master cut out 40 amp switch. I have just replaced the 25 amp off/auto/on switch. The cut out still trips during the night.

Any suggestions or help would be much appreciated.

HandySparks · Aug 9, 2017

Tony Hillyard said:
... but the cut out is tripped during the night....
...I have replaced the master cut out 40 amp switch.

Is it the "master cut out 40 amp switch" that's tripping?

If so, is this an RCD/earth leakage circuit breaker/interrupteur différentiel ? (It will have a 'test' button on it.)

Lee42 · Aug 9, 2017

westward10 said:
Who said it is over heating.

He said it was tripping out.
But still hasn't come back to us about what part is tripping out.
Most of the time on a water heater it is to do with the safety cutout. Unless the element is starting to fail.

Tony Hillyard · Aug 9, 2017

The water heater is in a separate building with it's own consumer board. When the cut out operates it trips the supply in that building, not the supply in the house.

I take on board the comment that the thermostat might be set too high, so I have reset that to a lower temperature. I will check tomorrow morning to see if it has tripped again.

In the mean time I will up load a picture of the cut out and heater off/auto/on switch.

As you have gathered, electrical problem are not my thing. Photographic or vintage car restoration yes, water heaters NO.
Thanks again for replying.

P.S. I am trying to find somewhere to poke the Garlic!

[ElectriciansForums.net] Electrical water heater problem

Pete999 · Aug 9, 2017

westward10 said:
Who said it is over heating.

No one said it's overheating, we have not been informed as to what is tripping, assumptions have been made that it could be the overheat trip. Until the OP comes back and tells us which device is tripping we are all shooting in the dark. The OP has no electrical qualifications by the looks of it, so it is likely he is getting confused, and transmitting that confusion in his post, not his fault, but it does make it difficult to glean the right information.

Midwest · Aug 9, 2017

Which one of those two switches, is 'tripping'?

Tony Hillyard · Aug 9, 2017

The one on the right... 40 amp

Midwest · Aug 9, 2017

Might be your heating element has given up the ghost?

Pete999 · Aug 9, 2017

Tony Hillyard said:
The one on the right... 40 amp

An RCD so looks like you have a fault on your heater, best get Mr Electique in for a butchers.

Midwest · Aug 9, 2017

Pete999 said:
An RCD so looks like you have a fault on your heater, best get Mr Electique in for a butchers.

See Echolalia post

Tony Hillyard · Aug 9, 2017

Thanks everyone, I will do just that.

Midwest · Aug 9, 2017

Pete999 said:
An RCD so looks like you have a fault on your heater, best get Mr Electique in for a butchers.

And make sure he's been to Specsavers. Seen those French plumbers make a right expensive mistake.

davesparks · Aug 9, 2017

Pete999 said:
By keeping the heater powered up for to long causing the unit to overheat, and trip the over heat relay? maybe.

which is only possible if the thermostat has already failed closed, in which case the root cause of the problem is the thermostat.

Electrical water heater problem

Tony Hillyard

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HandySparks

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Lee42

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Tony Hillyard

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Pete999

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Midwest

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Tony Hillyard

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Midwest

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Pete999

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Midwest

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Tony Hillyard

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Midwest

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davesparks

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