Our boiler keeps loosing pressure so that it goes below 0.5. I top up the pressure to 1.5 but it goes back down over the period of 3-4 days now. Can someone suggest checks to make before I have to call out a plumber? I have bled the raditors and checked for leaks to them and they are fine. Why is the pressure dropping? Could it be we need a new expansion vessel? The boiler is 10 years old and passed it's service last August.
ideal Response 200 boiler low pressure problem
- Thread starter newhomeowner2
- Start date
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Maybe it's a Response 120 I'd have to check tonight. Either way, can you advise on what we should do?
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If you are losing the pressure in 3/4 days then you have a leak. Check the blow off pipe which goes outside to see if it drips (especially when htg is hot) also check rad valves when cold (especially under plastic tops) if no joy then get a torch & crawl under floorboards to find it
Thanks for those tips! I'll check the blow-off-pipe outside tonight when the heating is on. If it is that - what does it mean? We need a new blow-off-pipe or that something in the boiler is causing the leak?
I can't find the FAQ section on this website anywhere! There is a little water spitting out of the pipe outside the house when the boiler is on. Is this a problem as the pressure reads between 1.5 and 2 when the boiler is on which I believe is normal.
I found a leak in the radiator last night and fixed it. Should that solve the problem with low pressure when the boiler is off?
I found a leak in the radiator last night and fixed it. Should that solve the problem with low pressure when the boiler is off?
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