whistling

Hi, I have a baxi duo tec 24 and its started having some weird behaviour. When I run the hot tap the pressure drops and it making a really quiet high pitch whistling sound. The sort of sound that would drive teenagers and dogs mad. No error codes and all work fine. Just want to know what checks...

I had a new door fitted end of February. At first it was like opening and closing a air lock but over time it's opens and closes like a normal door. The trouble is whenever it's windy it's stats to make a noise. They guy who fitted it and another tradesman tighten the door but says there is no...

Hi there, Recently had engineer out to our 11 year old Oso direct immersion water heater as it was slow dripping through tundish. He drained and refilled/reinstated internal air gap and no dripping now, however, when turned on it immediately starts making a slight whistling/squeal type noise...

Hi folks, I have a Ravenheat RSF820/20 boiler in my flat. Recently it started making a whistling noise when it passes 2 on the pressure gauge. I bled the radiators until the pressure went back to 1. Immediality after opening the boiler, the pressure is past 2 again and is making the whistling...