Hi, this is my first post here and probably my last attempt at finding a solution to my shower problem, before i buy a new one Shower: Mira Model: Advance 8.7s Rated: 8.7kw Supply 240v Age: 4 years Problem: Recently the shower service light appears on, then the shower water turns cold, we then wait a few moments after turning the shower off at the main pull cord, everything appears to work fine then. I have a limescale remover attached to the cold water feed inlet, and also cleaned the water inlet filter contained with in the shower unit, but the problem still persists. This has now become a regular routine, every time we want to use this appliance, now the shower refuses to work. When we press the on button, a weird low buzzing noise is heard but no flow from the shower, a friend who had an identical shower,had the same problem, he replaced the PCB at a cost of £90.00, as advised by an electrician, but the shower still did not work. I expect having paid £300.00 for a shower to last longer then this, if anyone has a solution to this problem or can steer me in the right direction, i would be very great full. Many thanks for your attention.