First post on the forum so please be gentle.
Moved into a house a few months ago with said boiler. From cold it fires up fine and runs until the rads or HW is up to temperature, shuts off for a bit, then it goes into start/stop cycle every few seconds sometimes for up to a minute. Eventually stays on for a while, shuts off, then the cycling again.
Possibly related is that there is a sound like air going through the pump upstairs, again only when it is up to temperature.
Any ideas what the likely cause is?
Moved into a house a few months ago with said boiler. From cold it fires up fine and runs until the rads or HW is up to temperature, shuts off for a bit, then it goes into start/stop cycle every few seconds sometimes for up to a minute. Eventually stays on for a while, shuts off, then the cycling again.
Possibly related is that there is a sound like air going through the pump upstairs, again only when it is up to temperature.
Any ideas what the likely cause is?