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Plumber came yesterday and confirmed my boiler was just a rebranded GlowWorm Ultimate. He also said it was the thermostat at fault and he'd had another one go wrong in exactly the same way the week before! He just phoned his parts supplier and said "same again". He came round today and...

I have someone coming round tomorrow afternoon to look at it. I said I suspected it was the thermostat, but if I'm really lucky, it might be the knob is out of sync and he can fix it without ordering anything! Thanks for your help.

Do you reckon I should I buy one of these clip on pipe thermometers and test it out before I call someone in? Since I am not competent enough to actually fix it, I guess whoever I call can diagnose it and fix on the spot. More info: The other current quirk of this boiler at the moment -...

Thanks for the reply. The overrun operates for about 3 minutes after I turn off the heating, but I'm not sure how that could be the problem. In normal operation, I would have the heating on for a number of hours and expect the boiler to ignite on demand to keep a steady temperature. I...

I had the exact same thing happen to me in my flat in Manchester. Probably still happens, but I've moved out :) If I held the ball cock down after flushing, it didn't make the noise, if I remember correctly. It was only when it was asking for a slower trickle, after filling up most of the...

Once ignited, the boiler (Tricom ProTherm 40-50 CI, 4 years old) in my vented system will not go off, causing it to eventually trigger the overheat cutoff (and much noise from my pump and pipework due to the insanely hot water inside). I understand that a properly functioning boiler will...

Protherm 40-50 CI Hepworth Heating Ltd The pump is external to the boiler.

I am in Glossop, Derbyshire, but work in Manchester. I suspect all that is really wrong is whatever controls the boiler coming on and going off. Is that the PCB, the thermostat or the thermocouple or something else? Why would a boiler only come on when the knob is at 0 and go off when I...

It's never overheated in the past. Only when I have had to force my suspect boiler to come on by setting the knob to zero. The ReactFast man said that it was very unusual to have no room thermostat at first, until I said all the rads had TRVs. He then said there should be one without, I...

Thanks for replying, guys. I was beginning to think I had broken some rule and was being ignored for it! Being compeltely new to this forum, I guessed that the more information I supplied, the better. I could have been more concise, I know, but I was just typing as I thought, probably for...

Surely someone must know something about this. I am trying to determine what work needs doing before I go ahead and book someone.

I had a Baxi recommended to me yesterday (by a Reactfast engineer), based on the 5 year warranty. The best price I can see for the Baxi Platinum Combi Condensing Boiler is £880 (including VAT). I too would like to know if this is the best boiler to buy.

THE CONCISE VERSION FIRST Why would a ProTherm 40-50 CI boiler only come on when the thermostat knob on the front is at 0 and go off when I turn it round to anything higher? With it set at 0, it never shuts down and consequently overheats. The knob used to be set at MAX permanently, but...