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Hi,
I've got Baxi 552 backboiler. If I leave it on for say 2 hours or more, when I turn it off I get a lot of whooshing and bubbling running through the pipes. If I go in the airing cupboard then there's a cold pipe that goes to a t-joint, this pipe goes from ice cold to flipping hot, so I guess hot water is going up into the loft tank (I haven't been able to get up quickly enough to look). Previously it's done this and water came out of the overflow pipe...doesn't do that now though.
No banging though, just whooshing and bubbling.
The thermostat is on 3, if I turn it down to 2 then it stops doing this but then the radiators don't get hot enough.
Any ideas?
cheers
I've got Baxi 552 backboiler. If I leave it on for say 2 hours or more, when I turn it off I get a lot of whooshing and bubbling running through the pipes. If I go in the airing cupboard then there's a cold pipe that goes to a t-joint, this pipe goes from ice cold to flipping hot, so I guess hot water is going up into the loft tank (I haven't been able to get up quickly enough to look). Previously it's done this and water came out of the overflow pipe...doesn't do that now though.
No banging though, just whooshing and bubbling.
The thermostat is on 3, if I turn it down to 2 then it stops doing this but then the radiators don't get hot enough.
Any ideas?
cheers