Gainsborough SV800- no cold water

padyjoe

I have a Gainsborough SV800 shower and despite of being on low power and lowest setting, the water coming out of it is too hot. It's mains fed and with the control knob I adjust the flow of water.

What I've observed so far:

has an aftermarket showerhead (don't know where is the factory one), taking it off and using to hose only makes it bearable,

when switching on for 1st time cold water flowing (no showerhead) it starts screaming for lower the temp and it's on coldest setting already,

the earth wire not connected to the shower but it's there, why not? should I connect it?

Anything can be done to rectify the problem? Compared to the 'coldness' of water flowing when heating element off I think the fluid spends too much time in the heater cylinder, becoming too hot to handle.

Thank you!!!

The disconnected earth wire rings alarm bells, you should get that checked out by an electrician.
As for the high water temperature, it think you're correct in your assessment about the water being too long in the heater, sounds like insufficient flow from the mains water.
What is it like with the water flow on at full.

solargain

Clean the input water filter and the shower head, I assume it worked at some stage and get an electrician to look at the wiring , it needs to be earthed