Mira Sport 9.0kW Shower Tripping and Running Cool - heater tank??

I have a Mira sport 9.0kW, It was working fine till last nite. This morning I was brushing my teeth, open the bathroom sink tap and when I closed it again the shower starting pouring cold water from the bottom (outlet to the hose/shower head)!! The shower was not even ON.... freaky!!! I was told that I need a new heater tank, that the heater tank is gone! Is that true or is there any other reason?? I want to buy the tank but not sure if that is the real problem! Any help??? Thanks

Manu
March 2012

Many thanks - I went for it and swapped the heater tank this morning. The heating elements on the new heater were both about 12 ohms, and I was able to confirm that one of original one's elements had indeed blown. I reckon when it blew the element must have briefly contacted the heater tube and tripped the RCD.
The swap can be done with the shower in situ (with power off!) - the only fiddly bit is a clip on the tank that locks underneath a corresponding clip on the rest of the mechanism but it can be done with some careful 'easing'.
The new heater tank was a slightly different design to the original but all instructions were included.
All working now for about £65 and about 20 minutes effort.

Dave
April 2007

you can replace the heating element. there is two elements in the copper cylinder, so there will be four rods coming out the top two for each element.do a continuity test to see what two go together. once you have found the two that go together you can check resistance on them you should have 10-20ohms. but make shaw a electric is off. sometimes its just cheaper to fit new shower.

hi-spec plumbing
March 2007