I have an old worchester bosch 230 combi gas boiler 11year old. Awoke thismorning to find lots of water dripping from under boiler. There was water over the electrics, most of boiler. After mopping up, it appears the water coming from aav. Black valve found in bits, at base of boiler housing. No water & no pressure in boiler. Tried to add water via loop, poured out of the small hole on side of aav.
Q1 What is possible cause of valve having blown?
Q2 Is it safe to go ahead & replace the aav?
Q3 New valve is different height from old one? The 3/8 thread hole is longer than excisting one. The valve is ontop of new one, not at side as excisting one. Book says part number is correct. But do u think i Have got wrong one?
Its starting to get a little cold around here............
Q1 What is possible cause of valve having blown?
Q2 Is it safe to go ahead & replace the aav?
Q3 New valve is different height from old one? The 3/8 thread hole is longer than excisting one. The valve is ontop of new one, not at side as excisting one. Book says part number is correct. But do u think i Have got wrong one?
Its starting to get a little cold around here............