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Central Heating

Combi boiler losing pressure - tenants in rented property

Anonymous user 23/02/2024 - 3.36 PM

We are in rented property and have noticed over the past year the combi boiler loses pressure (below 1), which our landlord didn't seem concerned about. Recently over the past few months we've had to occasionally top it up using the valve, once every few weeks. However last week it needed topping up every other day and this week almost twice a day (to the pressure of 2). It's coupled with the cooler weather. Is there anything we can do to check and eliminate problems before going to the landlord? Radiators and hot water work fine when the pressure is in the green. Radiators do not need bleeding - we've checked that. Can we for example test each radiator / hot tap at a time to see if it's in the pipes or leave it all to the landlord.

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4 Answers

Jc plumbing and heating

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Swindon

Probably to do with a leak somewhere on the system. Check there is not a small leak anywhere on the system including the radiators. Check the the pressure relief valve on the boiler isn't letting by. There will be a pipe attached to the boiler that discharges straight outside. See if this is wet or has stained the wall in any way. This will be a sign of a pressure relief valve letting by.

Answered6 October 2020

Anonymous user

Hi there multiple reasons for this problem 1. Possible pressure vessel fault 2.prv passing (check pipe on outside wall) 3There could be a leak on the heating system which is getting worse over time. You will need to get a gas registered engineer to take a look

Answered6 October 2020

Anonymous user

Call a heating engineer

Answered6 October 2020

R Wade

Rating: 5 out of 5

Bishop's Stortford

Normally it can be a leak or expansion vessel split or leaking. If when you’re topping up the pressure it rises Very quickly And the needle on the gauge is very bouncy its normally a sign of expansion vessel problems. Other Than that it could be signs of a leak. If all you’re pipework to you’re heating is visible and you cant see no leaks. Check that pipe outside the wall behind the boiler to see if its been leaking outside. If you’re unable to find the cause after this and you have concrete floors in the property with heating pipes coming out from the floor its going to be a problem and may need re-piping. Hope this helps

Answered8 October 2020