Central Heating Question

Dropping pressure in combi-boiler

We are letting out a property. My tennant claims (I have no reason to not believe her but I havent seen the issue myself) that the boiler doesnt come on in the morning for the central heating.
She found what the pressuare gauge is very low and opened the tap for closed circuit whichfills up the loop and that causes the combiboiler to immediatly come on. She said she had to do this almost every morning for the last week.

When I heard of it I assumed there was a leak somewhere, which I assumed would have meant air getting into the system but after checking all the radiators none of them had any air in them at all!
I guess that means it isnt the radiators leaking rather something in the boiler?

Anyone got any ideas of what could be going on here?

2 Answers


you need to contact a Gas Safe engineer. You can not fix this yourself. It sounds like a number of things. pressure vessel, heat exchanger, prv ??


Answered 5th Dec 2011

Deans Heating

Member since 22 Jan 2010

I agree with Dean this sounds like something more serious and any work on your boiler needs to be done by a gas safe engineer

Answered 5th Dec 2011

MDS Plumbing & Electrics Ltd

Member since 5 Dec 2011

Need help with your project?

We have tradesmen ready to help you. Post a job, read reviews and hire today.

Post a job

Need some help?

Post a job on MyBuilder to find quality, local Heating Engineers who can help you with your project.

Search all questions