Hi
I have a vaillant system bolier with a Unistor Cylinder.
Everything was working fine until the cold supply was turned off for a few hours due to a water main issue.
When the water came back there was some air in the boiler that my plumber took out by unscrewing the small cap. He left and that evening the pressure dropped on the boiler. I filled it again and pressure is now ok. The hot water temperature is not right as water is not getting hot and just staying lukewarm. I called him but he is not available to come back for a few days...
I will try to set the zone valve to manual to see if this is failing but I suspect there is still air. What else can I check? Could there be air in the cylinder or somewhere else?
Thanks.
ARH.
I have a vaillant system bolier with a Unistor Cylinder.
Everything was working fine until the cold supply was turned off for a few hours due to a water main issue.
When the water came back there was some air in the boiler that my plumber took out by unscrewing the small cap. He left and that evening the pressure dropped on the boiler. I filled it again and pressure is now ok. The hot water temperature is not right as water is not getting hot and just staying lukewarm. I called him but he is not available to come back for a few days...
I will try to set the zone valve to manual to see if this is failing but I suspect there is still air. What else can I check? Could there be air in the cylinder or somewhere else?
Thanks.
ARH.