Looking for advice on boiler pressure please

[bex0_10]

Hi,

Before I start I will say I am completly clueless on boilers and central heating!

On friday night I noticed the pressure dial on my boiler was low - 0.5/4

Yesterday the engineer came out and put some pressure in it and also showed me how for future.

I have been out all day and came home about 6pm, the heating comes on at 4pm, and noticed the dial was at 3 which is says is too high (says pressure should be between 1-2.5)

I noticed radiators seemed overly hot so turned down thermostat and also the central heating knob on the boiler, I don't know if this is coincidence but since then the pressure has gone down to 2.5. I also notice the water in the hot tap is very hot very quickly.

Just wondering if this is normal and ok to use the boiler? The pressure is still down at 2.5 and will keep checking to make sure it doesn't return to 3.

It is a baxi combi 105 HE.

Thank you.

 

[hedgehog65]

The pressure when cold and boiler off should be 1.5 bar. As the boiler heats up the pressure will rise. this is normal. As long as the pressure does not reach 3 bar you are OK

 

[Billy Bob Bob]

a 105 he should not be on 2.5 when cold it should be on 1 bar,running it this high will either make a o ring burst or blow up the secondary heat exchanger only use it if your desperate get someone back to fix this asap your filling loop may be faulty

 

[bex0_10]

Thank you. When I first came in this afternoon it was at number 3 and the boiler would've been on for 2 hours as the central heating is set to come on at 4pm and I got home about 6pm.

Shortly after I arrived home it went down to 2.5 and has stayed at that throughout the evening.

 

[gastec]

hello it is fine to run a 3bar hot 2.5 bar cold. make sure the filling link is turned of properly. if the pressure drops below 1.5 bar when cold you could have further problems.

 

[Billy Bob Bob]

Thank you. When I first came in this afternoon it was at number 3 and the boiler would've been on for 2 hours as the central heating is set to come on at 4pm and I got home about 6pm.

Shortly after I arrived home it went down to 2.5 and has stayed at that throughout the evening.

TBH bex i know your boiler backwards,i can rebuild one in my sleep,it should only ever be on 1 bar cold when it expands it will reach 1-5 -2 bar hot,you dont want to pay out for wrecked components if its unavoidable,either the guy you have had out as put to much water in or the filling loops faulty

 

[Billy Bob Bob]

hello it is fine to run a 3bar hot 2.5 bar cold. make sure the filling link is turned of properly. if the pressure drops below 1.5 bar when cold you could have further problems.

no it is not not on this boiler

 

[dancinplumba]

hello it is fine to run a 3bar hot 2.5 bar cold. make sure the filling link is turned of properly. if the pressure drops below 1.5 bar when cold you could have further problems.

nonsense, listen to gas man only on this imHo

 

[bex0_10]

TBH bex i know your boiler backwards,i can rebuild one in my sleep,it should only ever be on 1 bar cold when it expands it will reach 1-5 -2 bar hot,you dont want to pay out for wrecked components if its unavoidable,either the guy you have had out as put to much water in or the filling loops faulty

Thanks, it has been at 2.4/5 all evening with the heating on. Is this ok? The boiler is still on and set to go off at 11pm, on again at 5.30am.

 

[Billy Bob Bob]

Thanks, it has been at 2.4/5 all evening with the heating on. Is this ok? The boiler is still on and set to go off at 11pm, on again at 5.30am.

not really the pressures far to high

 

[bex0_10]

not really the pressures far to high

Ok, will turn it off and call them back in the morning. Can't do without my heating as I've a young baby in the house. Thank you for the advice!

 

[bspareltd]

detach filling loop and you will find out if it is passing also bleed some of radiators to reduce your pressure