I have an old Showerforce 1000XM, connected to hot/cold feeds from the attic immediately above the bathroom.
There is white switch just next to the attic hatch labelled "Isolation", and has a small picture of a fan on it.
Occasionally (usually after sustained use), the shower trips the main blue fuse on the MCB.
The only way I can get electrics back on for the rest of the house is to turn the white isolation switch off, sometimes for 4 or 5 hours.
Then eventually I can turn the shower isolation switch on again & shower works.
Unfortunately the isolation switch appears to isolate all the loft electrics (light, mains sockets), so TV reception is lost as the aerial amplifier is located up there.
Any ideas what the problem could be & how to fix it ?