Recent content by Jon2412

Hi all, Managed to free the castellated nut at last. As suspected, pin has a build up on its surface stopping it moving this all the hot water was pushing around the bypass. A good clean and grease and should be back in business! :-)

Thanks Ian

Hi Agile, so whilst I see what you say, the motor actuator is working and the hot water is flowing to/from the expansion/reservoir. That suggested the motor actuated diverter is working. Basically I can preheat water as much as I like, I can demand hot water (as seen my water flow sensor...

The diaphragm is fine, that is working perfectly when hot water is demanded (it was only renewed a few months back), so when water flow is detected, pin moves forward and requests bolier to fire up. All of that works, the preheat circuit gets really hot, just never gets hot water to the plate...

Hi Agile, as above as noted by flying fish the one on the right, flow diaphragm has been removed now trying to undo the castellated nut but it's not playing ball.

Ah okay thanks for this, that will make life a little easier perhaps. System is drained so no pressure in it and the inside of the nut is bone dry with no sign of leakage. Thanks for your replies. Most insightful.

Flyingfish - thanks. It is indeed an instant version, my bad for not noting this up front. Thanks for the advice on the tools - looks like I might need to buy one! The front part of the assembly doesn't look like it is a screw fitting? The p/diff just sits on it with a clip and I see no...

Thanks Agile. Does sound like it might be false economy to try and clean it up. I don't relish the idea of going through all this again in some weeks time! Between my time and replacement gaskets and things I think I shall pay up for a new assembly. Though how on earth am I supposed to get the...

hi all, I have a Baxi 80He boiler. Rads we're working fine but no Hot water. Have checked that the flow sensors were working, pump was clearly working, system pressure correct, boiler firing as expected and temp sensors indicating rise in water temp on the front display. I noticed in hot...