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Man it's taking the ****. Only changed it just under two months ago and now have to do it again. I did give the inside a good clean down before replacing the diaprahm. Will post back once done to say if that was the problem. Just seems that the hot water arm does not function till tap water...

Thanks for the help. Just ordered a new diapraphm and bearer. Guess I did not clean off all the crap as good as I should have done last time. Can I ask another stupid question - if i measure water from a tap that would be dependent on how much water is flowing? Shall I get a bucket and...

The arm disengages back to it's 'off' position as if no demand for hot water is being made rather than not fully extend becuase the diagraphm is worn. The mains water inlet to the boiler is turned to maximum input. How do i check the litre pressure of water passing through the boiler ? I...

To add.....checked the 2 micro switches and they are ok. Noticed the 3 port arm disengages to off position completely however if i turn the hot tap off and wait ten seconds and turn back on again the port arm fully engages.

Only replaced the DHW diaphragm about two months ago - made sure I cleaned away all the old crap inside before I replaced it with the new one. I have also found if i run the hot water tap at max output then it does not switch off however the water is only ver mildly warm.

Can someone pls suggest anyting.....Hot water till today worked a treat. Now if I switch on just the hot water tap, i get hot water for about a minute before it goes cold - the boiler shows no red light and if i switch the tap off and back on again after 10 seconds or so i get hot water again...

Hi, can someone please help. I have just moved into my new house and aquired an integrated Diplomat ADP 8500 dishwasher. I have searched the net and cannot find this model listed. I am after a user manual and cannot even find the Diplomat website. Can anyone offer any help. Thanks

Hi, I was trying to adjust the water temp on my boiler and have accidently changed the P2 switch setting (I know the sticker says NOT to alter the P2 and P4 factory settins!). Does anyone know what the setting should be (manual or picture). It's a 'turn type' switch. Also can the boiler...