Immersion troubleshooting - is there anything else I can test

[DP]

Use a multimeter and check for 240 volts at the element terminals

I would WITH POWER OFF check both live or neutral terminations to earth in case the immersion element is split ( quite common)

 

[CBW]

Use a multimeter and check for 240 volts at the element terminals

I would WITH POWER OFF check both live or neutral terminations to earth in case the immersion element is split ( quite common)

Still required now it’s working Dan?

 

[Johntheo5]

Are you suggesting a safety device be bypassed? I know there’s the high limit stat, but should something happen could be liable?

The original immersions with the externally mounted hi limit (safety) stat only had a control thermostat as was the case no doubt with this installation, the last immersion I changed had this (now) combined control and hi limit (safety) stat so no requirement for two safety stats, one of my relations HW cylinder started boiling over recently, I found the external hi limit stat which had only been glued to the immersion boss had become detached and wasn't in contact with the immersion boss, I replaced it with the combined unit.

 

[DP]

Still required now it’s working Dan?

Ignore if working, Chris

 

[Johntheo5]

Good description here from JW of how both stats work, in case anyone is in any doubt that there isn't a separate set of contacts. A electric shower thermal cut out (TCO) use two of these discs (its called a duo disc), one, set to 48C, is self resetting, the other, set to 75C, does not reset, the TCO must/should be replaced, you can see one of the discs below, the other is behind it but I don't know if there are two separate sets of contacts.