On 28/05/2019 17:54, JoeJoe wrote:
On 28/05/2019 17:16, Andy Burns wrote:
Chris Hogg wrote:

How many elements in the heater tank does it have? Having three
settings suggests three.

some use 1=low, 2=med, 1+2=high

Found the booklet/installation manual (sad, I know).

Is this diagram of any help in working out what may need replacing?


http://tinypic.com/r/291lv6u/9

That looks pretty similar to the online one listed earlier. The three
likely candidates are the heater itself (1563.505) or the stat (416.41)
or the switching unit (1563.510).

Only way to find out is to test them - starting with the heater.

--
Cheers,

John.

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