Aga loud bang then yellow water

[Oliver]

Hi folks I have a gravity feed Aga twice in the last week a very loud bang came out of it, not from the fire box (its oil fired) but from the hot water side i immediately ran the hot tap and the water was yellow for a time then went clear, i am thinking a valve is sticking somewhere anyone had this problem and know which valve it could be or if its anything else
Olly

 

[oz-plumber]

Time for a service Pal.
Before any real big bangs happen!!!

 

[SJB060685]

So i assume its a gravity fed and feeding just hot water? No heating?
Where did the bangs originate from? In the burner chamber or the hot water cylinder?
For safety's sake I suggest turning the oil off at the OCV until someone can find and rectify the problem.

 

[SimonG]

Sounds like the water might be boiling or getting very close to it.

 

[Oliver]

Thanks for your replies. i did turn it off strait away and had a good look today it only heats water and the bang came from the water chamber the fact that the water then went yellow i agree would suggest it was boiling or very close i cant find a blow off valve or outlet pipe or anything to stop it exploding should get to hot as far as i can see its a completely sealed system this makes no sense to me as far as i am concerned its a time bomb so for the moment its staying off any more advice would be appreciated

 

[SJB060685]

So this is a vaporising sleeve burner on a completely sealed system? No header tanks in the loft? This is installed wrong and dangerous as you say.
Are you sure its not a primatic cylinder?

 

[king of pipes]

Thanks for your replies. i did turn it off strait away and had a good look today it only heats water and the bang came from the water chamber the fact that the water then went yellow i agree would suggest it was boiling or very close i cant find a blow off valve or outlet pipe or anything to stop it exploding should get to hot as far as i can see its a completely sealed system this makes no sense to me as far as i am concerned its a time bomb so for the moment its staying off any more advice would be appreciated

Get a professional in to take a look it sounds dangerous to to me . Kop