aquatronic 4 shower?

I have had this happen twice in about 8 years.

The first time, 4 years ago, I ordered a new power PCB, swapped it over and it started working again.

The second time, very recently, I tracked it down to a transistor on the control PCB, which is the PCB attached to the front of the shower behind the buttons. It's the top-most transistor, a 2N5551, and it was open circuit. There was also a resistor on the board, which had clearly been too hot ... brown PCB around it. I swapped the transistor and the shower is working again.

The symptoms looked the same to me, but were due to different underlying failures.

So I think it's worth checking for the hot resistor on the control PCB before replacing the other one.

will
November 2010

solenoid coils probably failed.
check with a multi meter.

hi-spec plumbing & heating (essex)
November 2010