Hi,
We have an Ideal Mini C24 combi boiler. Noticed when coming to use the central heating that the pressure guage was at 3. Vented preussure/water off from a rad to get down to 1 to use the boiler. After using it about 10 hours later the pressure is back to 2.5 to 3, even if the heating hasn't been used.
The filling circuit is permanently connected via a one way valve and then to unit which you turn to let in water to the system. I have replaced this hoping it had failed and was letting a trickle of water in but this did not help.
After looking on forums and speaking to a plumber the general opinion was the expansion vessel had failed. As a double check last night I let water out of the rad from a cold system down to 1 bar and then shut off the mains water over night. In the morning it was still at 1 bar.
Now I'm a little perplexed with the problem. Is there any way the boiler could be adding water to the central heating system internally. If so I would have thought the hot water would seem contiminated but it seems fine. If it was going to go anywhere in the boiler I would have thought it would leak from the boiler as it's at a higher pressure.
Any help greatly appreciated,
Thanks Doug
We have an Ideal Mini C24 combi boiler. Noticed when coming to use the central heating that the pressure guage was at 3. Vented preussure/water off from a rad to get down to 1 to use the boiler. After using it about 10 hours later the pressure is back to 2.5 to 3, even if the heating hasn't been used.
The filling circuit is permanently connected via a one way valve and then to unit which you turn to let in water to the system. I have replaced this hoping it had failed and was letting a trickle of water in but this did not help.
After looking on forums and speaking to a plumber the general opinion was the expansion vessel had failed. As a double check last night I let water out of the rad from a cold system down to 1 bar and then shut off the mains water over night. In the morning it was still at 1 bar.
Now I'm a little perplexed with the problem. Is there any way the boiler could be adding water to the central heating system internally. If so I would have thought the hot water would seem contiminated but it seems fine. If it was going to go anywhere in the boiler I would have thought it would leak from the boiler as it's at a higher pressure.
Any help greatly appreciated,
Thanks Doug
