Gas Boiler Pressure problem

Codogly

Registered User
Messages
182
Hi All,

My gas Boiler is recently showing high pressure reading above 3 in the red zone.
I have reduced pressure by bleeding the rads only for the pressure to rise back up to above 3 again. Have done this several times but pressure keeps rising.
Pottertron is the boiler make ... the feed is closed so can understand why pressure keeps rising?

Any suggestions would be very welcomed.

Many thanks,

Codogly
 
Hi ,
I had the same problem in January. Bleeding a rad would reduce the pressure but it would rise back up again within half an hour.
I called a gas service engineer and he suspected straight away that it was a 'pressure release / top up valve' located on a copper
pipe close to the hot water cylinder in the hot press. He said these have a tendency to seize up. He replaced it and the problem was solved.
 
With the system cold, if you bleed the system and lower the pressure to 1 bar, does it rise back up to 3 bar before you switch back on the heating or does it only rise back to 3 bar when the heating is back on for a while?
 
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