How to mend ... Pressure Rises Heating Rises

when heating system put on pressure rises when only hot water on system is ?

what causes pressure to rise when central heating system switched on

Bosch 532i Hot Water overheating?

Fault seems to be intermittent. Had local engineer in who fitted a new high temperature sensor last week. Ev... [Read more]

heatline s30 combi gas boiler?

hi i have a heat line boiler s30 when the heating is on the pressure rises slowly to 3.5 bar in the red i dar... [Read more]

B&Q Silverstar Boiler, main fuse blowing, losing pressure slowly?

Hi - All help is greatly appreciated as I am lost at the minute with this problem. My Boiler stopped workin... [Read more]

i think my pipe to the expansion vessel is blocked?

i have an icon 23t. the heating comes on the pressure rises to about 3 bar releasing all the water out of the... [Read more]

What is required to fix this?

My vokera combi boiler pressure is continuing to rise even when the filling loop is removed. I cannot use the... [Read more]

why does pressure keep rising when heating on?

i have an alpha he cb25 boiler,when i put the heating on the pressure rises towards the red zone and when i tu... [Read more]

worcester bosch boiler - pressure problems?

COLD- pressure is less than 1. demanding hot water trips the boiler. I turn the central heating on and the... [Read more]

vaillant ecomax 824e flashing e20,e13,f20. How to fix it?

Thing is, that my boiler (which is vaillant ecomax824e) use to go through these codes e20 and then f 20, or e1... [Read more]

how can i fix my combi 80?

combi 80 set pressure gauge to 1 bar start central heating system pressure gauge rises to 3 bars then i ha... [Read more]

saunierduval f23e boiler pressure needle rises to red marking 4bars?

I have a f23e sanier duval boiler.The pressure gauge rises to 4 when we put the heating on and then water star... [Read more]

How can i fix my ariston micro genus 23?

Hi,My pressure reading when off is almost zero(first line in red)boiler will turn on and run fine but then the... [Read more]

over pressure when turn on central heating?

hi my worcester 30si is over pressure when i put central heating on pressure is set at 1 bar.but rises to 3bar... [Read more]

boxer boiler pressure too high?

Help I have a boxer boiler. After bleeding my radiators, everytime i put the heating on the pressure rises to ... [Read more]

how can i fix my worcester bosch greenstar he 30?

ea appears if i turn off the yellow water tap but if i leave the water tap in the on position the central heat... [Read more]

potterton performa 24 no hw or heating?

pump runs when hot tap switched on pressure gauge on heating rises up from 1bar to 1.5 then when tap turned of... [Read more]

heatline condensing boiler?

When the heating is on , the water pressure rises from 1.2 bar to 3.0 , the window flashes blue with code FO 3... [Read more]

Glow Worm 24ci - hot water only luke warm?

Hi All, i have a Glow Worm 24ci about 7 years old. Recently when hot water tap is opened, water only seems ... [Read more]

Vaillant Turbo Max pressure gauge playing up?

Four year old boiler, gauge playing up. shows very low pressure ie one or below one when CH is off. When on t... [Read more]

Boiler pressure keeps increasing?

Hello, I have a Worcester Heatslave 15/19. When the central heating is switched on, the pressure rises.. I ... [Read more]