Valliant Bolier pressure to high at over 3!

[Becksters]

Hello
I have just turned my heating on after the summer and realised that the water pressure it at 3.0 - I have no idea how long it has been like this as I haven't needed to look at it! I have bled the radiators to try the release the pressure but there is no air in the system...
Any ideas what might be wrong or what I should do???
Any advice much appreciated!
Thanks
Becs

 

[glasgowgas]

turn off boiler

turn off filling loop

vent a radiator of water into a pint glass then into a bucket

keep doing until pressure at 1.5 bar

turn on boiler and watch to see if pressure rises

post back with results

 

[davebgas]

The filling loop could be passing, the expansion vessel could be flat/faulty, plate heat exchanger could be passing are some of the scenarios. Which vaillant is it as many have drain points that you could release the pressure from or vent water NOT air from the rads but that'll take dome time
don't use the pressure relief as 90% of the time they will leak afterwards

 

[glasgowgas]

is your boiler less than 2 years old?

 

[Becksters]

I dont know the make and I can't find the booklet - it is certainly more than 2 years old. How do I know where the filling loop is?
thanks very much
B

 

[glasgowgas]

is this your boiler


you had a mini C24 2 years ago

 

[Becksters]

No unfortunately that was my boyfriends boiler - otherwise that would have been a good idea! Any idea where I could go to identify it?
B

 

[glasgowgas]

your boiler could have an in built filling loop but with no details its hard to say

is there a silver braided hose going from 1 pipe to another pipe under boiler

 

[kevplumb]

View media item 11214

 

[Becksters]

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Hi - not sure if you can see this image in my album??
B

 

[Becksters]

I can't see the filling loop - would it be under the boiler and the grate?

Thanks
B

 

[bobw1956]

Your boiler has an integeral filling loop. look under the boiler you will see 2 black isolation valves,these are for repreasurising the heating system

 

[Becksters]

I think I can see them - would I be able to access them through the grate? it looks like there is a hole to allow access.
What do i do with them? Do I need to turn them and then I can drain the radiator to release the pressure?
Many thanks for all your help
B

 

[bobw1956]

do as glasgowgas, said then post back

 

[Becksters]

wow thanks I think I have done it! Although it looks like the pressure might be creeping up again but will keep an eye on it. I assume that if it does then there is something else wrong with the boiler
Thank you everyone for all your help
B