Curo lifehacks: How to thaw a frozen condensate pipe on your boiler
If your gas boiler is making an unusual noise, it may have a frozen ‘condensate pipe’. If it’s a Valiant boiler, it may be showing an error code of F28 or F77. You may be able to thaw this frozen pipe yourself.
If you can, go outside and look for a white plastic pipe coming out of the wall. This may have frozen water in it.
Try to defrost this pipe by slowly pouring hot but not boiling water over it. If you have a hot water bottle, put this on the pipe.
This video from British Gas shows you how to do this – note that you may not have the same type of boiler and the condensate pipe may be larger.