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Thanks both , I'll check the terminal periodically to see if it is working loose - couldn't have been tighter this time - needs to be to get all of the wires back into the box - its in the loft rafters above the ceiling so there's some slack left to push back through. All the embritteled...

Thanks guys, I've gone with MK usually, admittedly bought from a DIY Shed, but they're usually a good product I think. The replacement was MK again, so I'll keep an eye on it - check the tightness of the terminal again for good measure. Its the correct wire although it is at its limit at 9.0 kw...

Hi, wondered if anyone could offer an explanation of why this happens? The ceiling mounted switch for our 9kw shower began to get stiffer - not switching off cleanly and yesterday I heard what I assumed to be some 'arcing' in the switch. It was hot to the touch and beginning to smell a bit, so...

Just to close this thread, i fitted a flow regulator valve tonight, took about 20 minutes and sorted the problem :D It might hep other people to identify issues they are having....

Thanks, is it worth me doing any more checks to eliminate other parts? I've now measured the ohms between the blue neutral connection and each of the other element posts and get 13 ohms, so if the heater is OK and the solenoid, I suppose all it can be is the flow regulator? If t was a...

Hi Dave, tried that earlier, I then tried taking out the filter and found tiny bits of grit/ debris but no obstruction to the flow at all. On re installing the filter and switching the water back on, it worked as normal! Lots of flow, and heat. Great, but after switching the shower unit off...

To add a bit more, I've got a multimeter and measured across the two solenoid contacts and got 3.9 ohms, which from reading other posts appears to be in the right range. Does anyone know which contacts to measure across for resistance on the heater elements? obviously I've got the power...

Hi, I've just gone and tried that but its the same as with the hose off completely. Putting my thumb over the end it does build up pressure and it sounds like the heater tank is filling up as the pressure builds, but its still cold water, no temperature change as I moved the dial around.

Hi - first post here so hello! We've got 2 Mira sport showers in the house and have replaced them pretty regularly over the last few years - generally seem to last for 3 years or so before something goes wrong and its often been cheaper to get a new replacement off ebay than call out Mira or...