In article ,
alan writes:

I have a Triton Aquatronic 2 Ultra electric shower where the pressure
relief valve has operated.

I can see that the device can be removed from the shower and is listed
as a replaceable part.

It may be a bit of a hassle to remove unless I can find my right angled
screwdrivers so before I dismantle it can the valve be reset or does it
have to be replaced?

Currently with the shower hose removed (removing any restrictions) and
the shower running without heating the pressure relief is still open.

(And before anyone advises, yes the shower is now electrically isolated
both by the pull switch being off and the dedicated MCB in the consumer
unit switched off)

Is the heating tank choked with limescale?

--
Andrew Gabriel
[email address is not usable -- followup in the newsgroup]