I have tried looking for the expansion vessel charging valve on my Vaillant turboMax 824 boiler but can't find it can anybody tell me what it looks like please?
The boiler pressure rises by half a bar when the heating is on, so i suspect that the expansion vessel needs recharging.
I have recently replaced the PRV which seems to have cured pressure loss.
Thanks
The boiler pressure rises by half a bar when the heating is on, so i suspect that the expansion vessel needs recharging.
I have recently replaced the PRV which seems to have cured pressure loss.
Thanks