How to mend ... Boiler Pressure Rises Bar

worcester bosch heatslave 20/25 oilfired boiler?

when hot water or central heating are running bar pressure rises over 3 bar and overflow active . when unit l... [Read more]

ariston combi boiler?

My Ariston microgenus 27 mffi.is losing pressure through the safety valve(3 bar). when the central heating is ... [Read more]

ocean styleff?

when i put heating on the pressure bar rises to red on my ocean combi boiler styleff

High pressure on my Optima Ferolli 901 central heating?

Hi, I have a Ferroli optima 901 . I had problms with the DHW and foolishly adjusted this on the mod gas valve... [Read more]

pressure variations on thermaclassic f30e combi?

i put pressure to 1.5 bar , turn on the heater , the pressure rises to 2. 5 bar and the safety valve lets by ... [Read more]

How do I pump up the expansion unit with air:Sauvier Duval Combitek F23E?

When I use my CH and set the pressure to 1 bar it rises to just above 2.5 bar and nears the red. There is also... [Read more]

how can i fix my sime super 90 plus pressure?

my boiler is risen from 1.5 bar to over 3.5 bar i have blead all the rads in the house and got the pressure do... [Read more]

pressure drop in baxi 80e?

when i put the central heating on the pressure rises to above 3 bar so the overflow kicks in and i end up hav... [Read more]

Pressure rising each time boiler used?

Have Glow-worm Combi 30ci plus. Had the (cracked) expansion vessel replaced after leaking. Boiler pressure now... [Read more]

glow worm 24 cxi filling loop not working?

Pressure had dropped due to bleeding. Bled again (not used much during the summer) and pressure dropped below ... [Read more]

Glowworm combi boiler pressure rises when central heating on?

My Glowworm 30ci combi boiler has an operating pressure of 1.5 bar but when I switch on the central heating th... [Read more]

Whats wrong with my Vokera 24 compact?

I have just had trouble with the pressure release valve with water coming out the over flow everytime the heat... [Read more]

how do i reduce the pressure on my 30si glowworm combi boiler?

when on water heating only the pressure reverts back to 1.2 bar instead of the 1.0 bar. when on both heating ... [Read more]

how do I fix Vokera Flowmatic Combi Boiler?

WHEN MY HEATING IS OFF THE PRESSURE DROPS. I TOP UP THE PRESSURE TO 1 BAR, WHEN THE HEATING GOES ON THE PRESS... [Read more]

Boiler pressure rising?

Hi, i have a Sime Frirendly Format 80e combi boiler. Over a few months the pressure guage started to rise slo... [Read more]

Ferroli Optima 901 -occasional Hot water problem?

Hi I have a Ferroli Optima 901 combi boiler and have recently been experiencing occasional problems with no ho... [Read more]

Ferroli Optima 901 -Intermittent Hot water problem?

Hi I have a Ferroli Optima 901 combi boiler and have recently been experiencing intermittent problems with no ... [Read more]

How can I Fix My Ravenheat 820/20 boiler?

My ravenheat 820/20 boiler is supplying hot water but no CH. After a basic fault finding mission I discovered ... [Read more]

Ferroli Optima 901 -Intermittent Hot water problem?

Hi I have a Ferroli Optima 901 combi boiler and have recently been experiencing intermittent problems with no ... [Read more]

Sime Friendly - Fluctuating Pressure Guage?

Hi, Apologies in advance for my lack of technical terminology, I'm no plumber. I've got an 'issue' wit... [Read more]