Baxi Bahama makes loud whining noises towards the end of the heating sequence in CH mode only - hot water is fine. Found water in expansion vessel so replaced it and also the PRV but now venting(?) noise seems even louder 
I've also noticed that it takes a long time for the rads to heat up - the initial heating sequence only lasts a few seconds even when the system is cold. Is it possible that I'm getting either no or low flow through the rads - ?? If so, is it likely to be a pump problem?
Any other ideas??
Thanks!
I've also noticed that it takes a long time for the rads to heat up - the initial heating sequence only lasts a few seconds even when the system is cold. Is it possible that I'm getting either no or low flow through the rads - ?? If so, is it likely to be a pump problem?
Any other ideas??
Thanks!
