Baxi Combi Instant 80e Losing Pressure - Faulty PRV or......

[mike220]

Hi guys, sorry for my first post being a request for help - been lurking here a good while now, and will make sure I input some knowledge where I can to help others. Onto my little problem tho . . . . . . . .

OK, as per title I have a Baxi Combi Instant 80e. Losing pressure over a day or so if either not in use (heating) or little use. I have some water coming through the prv overflow pipe (not much though), and system runs fine once on - no rise in pressure to 3 bar like others who have had problems with the expansion vessel leaking. So am I right in thinking faulty PRV instead of the Exapansion Vessel ?

Or does anyone with more experience/knowledge have any other ideas ?

Many thanks in advance for your help guys - I need to get this one fixed for a decent cost now I'm currently out of work.

Cheers,

Mike

 

[mike220]

Anyone ? Before I go with my hunch and replace the PRV . . . . . . . .

Mike

 

[namsag]

If the pressure is not rising (and gauge ok) and you are getting a drip from PRV then it certainly sounds like that is faulty . take 2 mins to change one nut and an allen screw.

While boiler is empty it wont do any harm to check the pressure on the expansion vessel

 

[mike220]

Yeah gauge is ok, and no rising pressure - just gradually falling pressure lol.

Right o, off for the part now as my local stockist has them in, I went and checked earlier.

I'll post up the outcome for the benefit of others.

Cheers Namsag,

Mike