hello, I had my back boiler serviced by british gas one months ago - no probs detected. took a long time and cleaned thoroughly - thought they did a good job. this morning woke up to the boiler absolutely roaring loud. Pretty scarey. Radiators too hot to touch. the thermostat seems to be working fine - set at 20 degrees. Any ideas what this might be?
back boiler roaring and radiators boiling
- Thread starter asssagn
- Start date
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gaswizzard
Baxi by any chance? , thermastat phial can damage easily on these upon removal from , if the phial is tight in the pocket upon removal this can damage the stat , not the engineers fault just one of those things , so don't go blaming anyone. 
Gaswizard, are you saying it is OK for the engineer to leave the stat in that state then? The 'engineer' must have 10 thumbs and brain full of beans not to know the stat got blutered when he removed it, Surely any sane person would run the boiler in HW mode and CHECK STAT OK
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gaswizzard
So DP , are you telling me you sit with the boiler until it reaches temp? , I've been installing/servicing these for 30 odd years , the combustion cover has to be fitted before the phial can be inserted into the pocket , sometimes the hole in cover does not alighn to the stat pocket in hex which in turn makes for a tight fit to replace phial , on the next service the phial has to be removed and the only way to remove is to pull on the stat wire , easily damaged and not visiable to the eye , had one last week wherby it snapped due to being tight and In doing so had to fit a replacement , been called back a week later on another one of these with an overheat problem , pulled stat out and it snapped , the other issue being the tight radius when clipping the stat into fixing clip on front cover.
Gasswizzard wrote
Yes, I do. In HW mode it only takes a few moments. Stat on 1 setting will soon show if the capillary pipe has leaked.
Be assured other points you raise about phial being stuck, offset etc, I do agree with you, but I prefer to check the stat as indicated above
Yes, I do. In HW mode it only takes a few moments. Stat on 1 setting will soon show if the capillary pipe has leaked.
Be assured other points you raise about phial being stuck, offset etc, I do agree with you, but I prefer to check the stat as indicated above
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expertgasman
Guys, all your points are valid, but the op said it was serviced A MONTH ago. You would expect a damage TS to be immediately obvious.
OP, the stat is the first point of call here, but it may be simply coincidental that your boiler wasn't serviced recently. It is worth checkig to make sure that someone (kids) hasn't inadvertenly turned stat to maximum
OP, the stat is the first point of call here, but it may be simply coincidental that your boiler wasn't serviced recently. It is worth checkig to make sure that someone (kids) hasn't inadvertenly turned stat to maximum
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