I'll remove the shelves above if I have to - does this mean I won't need to take the whole boiler off? Do you know what part number the EV is?
Thanks for this.
Jon
Pressed the valve on top down - water came out!!! Does this mean that a new EV is needed. Interestingly, there is also a piece of mortar or plaster wedged between the EV and the boiler. Could this have caused it to fail?
Thanks,
Jon
OK will do - if this doesn't sort it, from my earlier post am I to take it that the PV is no longer thought to be at fault and that the plate HE could need replacing again?
Thanks for your help with this.
Jon
Thanks Dave - I have read post 31 in FAQ about Pressure Problems. Am I right that if the PV needs repressurising, the pressure in the boiler should drop massively once the boiler cools? On mine, the pressure stays high and the boiler keeps dripping even when totally cold.
My Baxi Combi appears to be over-pressurising and the overflow pipe that leads to the outside has a constant drip, drip, drip; this dripping gets worse when the boiler is on and the hot water is being pumped round the CH circuit or the hot water tap is on.
It has been suggested to me that...
I knew that the boiler was leaking and could hear a gentle hiss. I eventually managed to find a small jet of water spraying out of the plate heat exchanger onto the wall that the boiler is mounted on. Whan the pressure in the central heating circuit falls below 0.5 bar the leak sems to stop...
Thanks namsag and baxpoti - I undid the pressure differential assembly and found that the diaphragm was ruptured in two places. Fitted a replacement and problem solved. Thanks again for the help.