HVAC Questions? Ask an HVAC Expert for Answers ASAP
.what is your pressure reading , please
start it at 1bar but even with new filling loop it still rises after a while
Ok . your boiler has an expansion vessel. When the boiler system water is heated the hot water expands and pushes into this vessel( like a balloon in a metal case) . these vessels eventually go flat and the hot expanded water has nowhere to go .the pressure goes up and exits out of the safety valve to outside. So it gets refilled and etc etc. The vessel needs replacing if torn or repumping up. Think you are going to find that your pump has run dry and is not working properly, causing the boiler to overheat and make nettling noises
can the vessel be recharged if so what pressure required I take it the vessel is the red one at back. Was just wandering if it was possible that it could be the pipe work going through the heat exchanger cheers
Yes it can be pumped up with a car tyre pump or strong bycicle pump up to 1.7 bar. Hot waters ok so it won't be the heat exchanger pipe
Cheers ***** ***** that but not home now till Saturday
Changed the auto air vent and set pressure on vessel to 1.7 bar but still same ??
Yes the pump is spinning does feel warm cheers
pressure to shoot up and to have kettling noises this shows overheating, like a no low situation , caused if not by faulty pump then a blockage ( air or sludge) either in the heat exchanger or pipework
, just had a thoughtthought, if your hot water is ok then it could be that youryour diverter valve is stuck on hot water and not switching over to heating. This would cause the situation you are having. I think they call the diverter valve the flow switch boiler
Thanks information I think I can hear the diverted switching over but could it still be stuck in water mode ??
Cheers ***** ***** been most helpful I will get new pump and go on from there tried turning cold water off to boiler to see if no water going to exchanger but no differant so not hot water side ?? Thanks
Will get new pump and go from there cheers ***** ***** your help can I contact you again when I get pump and fit it cheers
Will give you a fantastic rating how do you do it
Not as yet nowhere in manchester open till tomorrow all the merchants close at 12 on saturday