ideal isar he30 condensing combi boiler

6 Apr 2008
Reaction score
United Kingdom
has anybody ever come across automatic air vent leaking water, on the ideal isar he30. at first i thought heat exchanger had give up the ghost but ive just stripped boiler and it looks like the water which is brown has come out of the air vent and leaked all over the boiler. any suggestions apart from scraping the boiler.
Sponsored Links
Another very common problem with the Isar. The older M30100 with the air vent at the front, would often take out the pcb when it leaked.

Absolute pain in the ar*e to change as flue etc has to be stripped out of boiler to get at it..

If brown water is from left side of HE then it will be the HE knackered. Had these go as soon as 18 months :rolleyes:
Sponsored Links
brown water is from right side of heat exchanger, definately looks like its come from air vent, taken vent out i shall fit new one before deciding on new boiler.

DIYnot Local

Staff member

If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.

Select the supplier or trade you require, enter your location to begin your search.

Are you a trade or supplier? You can create your listing free at DIYnot Local