I have a heat slave 15/19 oil fired combi boiler that is driving me and my plumber up the wall. It was losing pressure over the course of a couple of hours until it only held about 0.3 bar.
Plumber came out, couldnt find any leaks anywhere (walls and floors dry, valves etc around all rads dry, house generally dry) so focused attention on the boiler. Decided as the overflow was a damp along with the ground outisde that the PRV had gone. took it off an it was knackered so replaced it. Went away and started boiler as normal.
Came down the next morning with pressure at 4 bar! released pressure but slowly pressure would creep upwards whether boiler on or not. disconected filler hose just in case the valve was knackered but still rising slowly. Plumber called Worcester Bosch who decided it must be the heat exchanger. Got a new one fitted.
Woohoo! Pressure not rising, but now pressure is back to falling gradually over the course of a couple of hours. It seems to fall more quickly when the heating and water are OFF! i wonder if this is because the system cools and contracts and reopens any fault. I am really stuck, there is no sign of any water anywhere. What could be causing my slow pressure release? PLumber is at a loss!
HELP!![Eek! :eek: :eek:](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
Plumber came out, couldnt find any leaks anywhere (walls and floors dry, valves etc around all rads dry, house generally dry) so focused attention on the boiler. Decided as the overflow was a damp along with the ground outisde that the PRV had gone. took it off an it was knackered so replaced it. Went away and started boiler as normal.
Came down the next morning with pressure at 4 bar! released pressure but slowly pressure would creep upwards whether boiler on or not. disconected filler hose just in case the valve was knackered but still rising slowly. Plumber called Worcester Bosch who decided it must be the heat exchanger. Got a new one fitted.
Woohoo! Pressure not rising, but now pressure is back to falling gradually over the course of a couple of hours. It seems to fall more quickly when the heating and water are OFF! i wonder if this is because the system cools and contracts and reopens any fault. I am really stuck, there is no sign of any water anywhere. What could be causing my slow pressure release? PLumber is at a loss!
HELP!