thanks to all for prompt replies re- poss sticky aps - is there a correct method for testing aps ? as i have removed it , gently blown into it & can feel what i assume is a diaphragm moving in / out . and the best bit....... on refitting all seems ok ! too early to hang the flags out ??
hi there - would appreciate advice from anyone who can help
have vaillant turbomax 828 approx 5 yrs old
problem common to heating & hot water - burner seems only to ignite when it feels like it , fan starts- ignition process begins- sometimes ignites, sometimes will not ??
have replaced...