I have a Mira Vigour power shower - it draws H & C from the tanks, it doesn't have a heater, just a pump. It's 3 years old.
It's connected via an RCD plug as per instructions.
Switched it on tonight, it ran for maybe 10 seconds & stopped. I pressed the reset on the RCD plug and it came on for maybe 5 seconds. After that the RCD wouldn't reset at all.
Obviously a bit of diagnostics is required, but to save time is it "more likely" that (a) there is a fault with the shower or (b) the RCD plug is faulty?