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Central Heating

Worcester 24CDi combi boiler pressure fluctuation, dripping and locking out? Is my heating going to explode?

Anonymous user 28/02/2024 - 3.07 PM

Bolier Worcester 24CDi Combi. We moved in a few months ago and started off with problems with the hot water, we would 'demand' water and then the boiler would do 'ignition lockout' almost all the time, since then we regularly top up the pressure (every few days) to keep it between 1 and 2 bar and it seems to be a bit better, but you can't just turn the hot tap on and off and on and off as it still causes ignition lock out and we have to reset it regularly. Problem with this is we won't be able to use a timer for the heating as the clock and programme resets every time too! We think part of the problem was the previous owner had the washing machine plumbed in to the hot instead of the cold which was not good for a combi boiler! So the weather has turned and we tried putting the heating on for the first time...we tested 2 downstairs rads first, these heated up brilliantly, i then turned on the ladder radiator in the bathroom, this heated up brilliantly too, doesn't look like there is any air in the system. Before i put the heating on the pressure was about 1, the heating was on and i ran a bath, then noticed the pressure was creeping up towards 3 and as there is no guidance on pressures in the manual i found online, and no red indicator or similar in the gauge i don't know if it's something I should worry about or not. I turned the heating off and the system came down (over an hour or 2) to about 0.5, lower than before I put the heating on? When the pressure gets higher water starts dripping out of the bottom of the boiler, in several points i think, it got to barely dripping at all over the last month as we managed the pressure better and re-plumbed the washing machine in correctly but started dripping again when the heating pushed the pressure up. Are we just using it wrong? Is there a problem we can fix ourselves? (unlikely!) Could a professional fix it? should we just look into getting a newer boiler as this one is old any way? any help and advice much appreciated!

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2 Answers

Boiler Homecare

Rating: 5 out of 5
Honiton
This boiler will be at least 10 years old, so therefore parts will begin to fail, I cannot comment on your existing faults as this may encourage you to carry out the repairs yourself, best left to the professional's! As for replacing the boiler, I think that time is now upon you. Your call, either employ a gas safe engineer to repair existing faults or call it a day and seek quotes for a replacement.
Answered7 October 2014
7

Bollano Plumbers Ltd

Rating: 4.9 out of 5
Bromley
Hi There, You have a problem with the expansion vessel which is situated inside the boiler. Probably there is not enough air in it. That causes all these problems. I believe If you hire an engineer who will try to drain the boiler and pump the pressure up you will be fine. Worst case scenario replace expansion vessel and pressure relief valve. No need to replace your boiler. Thanks,
Answered30 January 2018
2