help i Have a logic combi Boiler the pressure was low so with a video call from the land lord was fixed and fine. Then had a lovely warm bath and the shower was used this evening and the presurre is high I tried bleeding rads no joy
Boiler Pressure too high
- Thread starter Kelly lu
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Make sure you fully turned off the filling loop ,(when you topped up the pressure earlier ). You can then reduce the pressure / water in the system using radiator bleed screw's ,but it will take quite a bit of time ,as a fair bit of water needs to come out. What is the actual pressure ??
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As much as it takes ( a couple of cups full probably ). I assume your central heating is not on in this weather ,(you don't want hot water coming out the rads )
Your safety valve should have lifted / opened at 3 bar so system shouldn't get to 4 bar. Are you certain the filling loop is closed I suspect it is not. Can you post pics of filling loop ?
Your safety valve should have lifted / opened at 3 bar so system shouldn't get to 4 bar. Are you certain the filling loop is closed I suspect it is not. Can you post pics of filling loop ?
post another pic of the pipes at the right hand side of the boiler that is where the filling link is
They look as if they are off, did you manage to reduce the pressure ?
yes it will take a fair bit of water from the rad to lower the pressure, the pressure shouldnt have got as high as 4 Bar, there is a safety valve set to release at 3 Bar, You should ask your landlord to send an engineer to check it
When it's off and cold, you should reduce the pressure to 1.5bar, when boiler is operating this pressure will rise to differing levels, depending on hot water or heating usage.
it should not go above 2.5(ish) if it ever reaches above 3, there is a safety release valve which should lift and pass water to outside.
If you're nearby when it does this, you would hear it (a sort of chuddering sound).
The fact that your pressure has got to 4 bar and then not immediately dropped below 1 means that it needs to be looked at by an engineer to determine why the safety release didn't operate when the pressure went above 3 bar.
it should not go above 2.5(ish) if it ever reaches above 3, there is a safety release valve which should lift and pass water to outside.
If you're nearby when it does this, you would hear it (a sort of chuddering sound).
The fact that your pressure has got to 4 bar and then not immediately dropped below 1 means that it needs to be looked at by an engineer to determine why the safety release didn't operate when the pressure went above 3 bar.
yes probably a few bowls of water, there may be a drain point outside your house or possibly on a downstairs radiator valve near a doorway
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