I have recently experienced my boiler losing pressure. I can reinstate the pressure using the valves underneath but over time it goes again. I have read on other forums that I can isolate the boiler with pressure up for a period of time and this will tell me whether the fault is with the unit or somewhere else in the system. Only problem - no one tells me what this isolating involves! Can anyone advise step by step what i do? Is it as simple as turning the heat and hot water off?Thanks
The only way you can isolate the boiler would be to shut off the supply and return, but there's not typically valves installed in those pipes....and even if there were, it'd be a bit of luck if they sealed well. If your boiler is leaking, you'll usually see that one or more of the burners are badly rusted from water leaking on them. If you take the vent hood off, you can usually see any cracks or rotted parts just by giving it a close inspection. Depending on the boiler, you may have to at least partially remove the jacket as well.. Hope this helps
