Recent content by molegrip

Hi, the antique pre-condensing Baxi 105e only has the simplest dial with no actual numbers on it. I have been running it on Maximum during this period of repairs so the panel lights have hit the 80C mark. Weirdly the system has never had any kind of thermostat, neither room stat or TRVs. I...

Hi all, thanks to all recent contributors. The good news from late yesterday continued this morning, with the boiler running steadily and reaching 80C at a normal pace and without any burner failure. The clean-out of the filter in the CH Return valve must have helped as it was seriously...

Thanks for that. I went through a number of ever-hopeful procedures, checked all electrical connections including on the PCB, and did find surface rust on the main Earth tab on the chassis (just to the left of the DHW diaphragm), so cleaned that up. Checked the fan and the venturi, close...

Back again. I cleaned out the Return pipe filter, and have fitted a new external expansion tank (old one almost just full of water). It has a 'new' (re-con) complete diverter. Everything looks good to go, no leaks, 1 Bar pressure etc. BUT....keeping temper....the CH is still failing: it...

Thanks, yep it was horribly gunged up with all sorts - matted. I got it cleaned up and replaced everything including a rigid filling loop, and that was the start of hours of confused faffing about, as the boiler would not re-fill through the loop at all. I took the loop off again, filter out...

Thanks, i just about remember digging a load of rubbish out of there a few years ago. Hiw to do with the Minimum of draining down ?

With the pump do you mean ?

Hi again. Fitted the new Expansion Vessel and the boiler fired up ok. The CH flow pipe was too hot to touch in about ten seconds, so i'm thinking there's no problem with the pump. Will run it to full temperature tomorrow and hope there's some progress and 'nothing to report', i live in hope.

Thanks v much, that sounds intriguing and its a new idea to me. I will get back with a report on the CH flow pipe heating up as soon as the new expansion vessel arrives and i can fire up the boiler, possibly tomorrow, definitely by Thursday. I don't know anything definite about the pump's age...

Thanks Ian, yes, the pin shoots up and operates the microswitch, the fan runs, ignition happens and the flame lights as normal, but it went out after a minute or two. Running the hot water side for a while 'persuades' the CH to stay on and reach full temperature. It was doing this last Winter...

Hi all. Just fitted a new Diverter Valve assembly to an ageing Baxi 105e, and after some initial problems with leaks from the pressure sensing pipes, it was all sound and leak-free, so ready to fire up. Yesterday it started and ran to temperature normally, but this morning, after the burner...

THANKS Ian, you're a star. Just before i opened this up i decided to try the old DHW valve (the 6-bolt thing) to see if is a better fit for the sensing pipes than the complete 'new' diverter block i got from ebay, and i connected them without any O Rings. To my relief (so far) they are not...

I'm totally confused now - i have one bunch of people saying the Baxi 105e sensing pipes never had O-Rings, another on the fence, and exploded diagrams like the one i linked showing O-Rings at the ends of the sensing pipes. Really need the cast-iron fact.

Thanks Chris, i tried the link but it doesn't show any actual location for the O-ring. No picture etc.

Thanks Ian, yeah maybe unlucky. When you've done that diaphragm swap all those times, did you take out the sensing pipes ? That's the only place i'm getting the leak. Point taken about the service kit - just thought i'd go the whole hog this time and get the whole 'lump of brass'. Would you...