My Sime Format 80 was not giving any hot water but the heating was OK.
I checked the diaphragm and it was damaged. I have replaced the diaphragm but still no hot water. The diverter valve plunger is not moving when the hot water tap is opened. But if I force the plunger open we get hot water?.
1. Is the diverter valve also faulty?
2. If the diverter valve is faulty do I need to change the entire valve or do you get repair kits (springs, seals etc).
3. What other parts would it be advisable to change at the same time.
4. Another problem I have had for some time is that the hot water does not get very hot or it is erratic. The pressure switch fluctuates. Could the above components have been gradually causing this over a long period or is it another problem.
5. Apart from the hot water temperature dial on the main panel is there an internal setting to control the hot water.

Any help or advice

George

George Holmes, April 2005

Its up to you whether you want to buy the reapir kit or a whole new valve. A repair kit would probably resolve your problem, although it may just be easier to replace the whole valve. The temperature of the water depends on the flow speed leaving the tap eg. if you require very hot water, turn the tap down to a slower flow. There is no internal regulation of the hot water temperature

Joe from AOC Plumbing & Heating Services, February 2006