Gainsborough antique royale

Intermittent hot sometimes shower freezing luke warm or very hot no Consistency if I switch shower on it Might run cold if I turn off again a number of times the water is then hot. I know there is hot water getting through as the left hand pipe is boiling
Asked 4 years ago by Bev Stevenson, Kirkham V1
www.showerdoc.com/gummers-antique-cartridge-chrome-sk1500-7cp

See the video on the above link . Water that is too hot may make the cartridge shut down.

Answered 4 years ago by Barrie Seabright

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