they have been back but it only makes the noise at night when its been on most of the day
they tested it and said it working sound nothing wrong there might be a leek on the rads or pipe work but i can not see any apart from the leek from the air vent ??
there is a bubbling sound coming from the boiler and hot water coming from the auto air vent we had a new air vent fitted 1 week ago and it is happening again it starts when the heating go's off about 1 hour later it bubbles and hot water spits out from the air vent then we have to top up the...