Baxi Duo-tec Combi HE A range condensing combi boiler Help and information on all topics relating to your central heating, air conditioning and ventilation issues.

[moggiethecat]

I have just had a new combi boiler fitted and I have noticed that every now and again it makes a sound as though someone had flushed the loo (like it's taking in water ) it only lasts for a few seconds - is this normal?