Expressions 9.5kW 500s boiling after shutdown

Hi, my shower goes straight onto medium heat when the isolator is switched on and even if hot or cold is selected. This is before its even switched on at the fascia. It also does this on shutdown and boils. It also buzzes loudly when running and sometimes pulses the water on and off when it's shutdown. Which relay might I need please?
Asked 3 years ago by Jonathan Burroughs, Peterborough
I think that one of the micro switches is stuck in the on position which is keeping one of the elements energised all the time.

www.showerdoc.com/redring-micro-switch-pressure-switch-93795804

The switch tends to overheat and can warp the levers so you may haave to replace these also.

www.showerdoc.com/redring-pressure-switch-lever-kit-plus-e-93590731

Answered 3 years ago by George Thomson

Thank-you. I will see if that works

Answered 3 years ago by Jonathan Burroughs

You will probably find that there is a micro switch stuck in the on position keeping one of the elements energised all the time.

www.showerdoc.com/redring-micro-switch-pressure-switch-93795804

What often causes a problem is one of the levers that the micro switch sits on becomes warped and this stops the switches moving properly.


www.showerdoc.com/redring-pressure-switch-lever-kit-plus-e-93590731

Answered 3 years ago by George Thomson

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