was previously so little it was evaporating when dripping onto boxing in access panel. now i have switched the heating on its is dripping every few seconds. can I just seal it or should i get a gas engineer out?
Blimey - the flue is leaking from its outside skin? The exhaust - and any condensate - is usually in the inner pipe section, so how the 'ell is that getting to the intake? Could it be driving rain hitting the flue? Whatever the cause, it's needs a GasSafe cove.
Its dripping from the join in the flue that takes the condensate out through the wall, directly above the access panel. The flue is boxed in.
Even more confused. What size is this flue - around 3" diameter or around 6" or even - dare I ask - around 1 "? Are there two separate flue pipes exiting your exterior wall? Or chust one 'normal' one which has a slightly longer pipe in t'middle (around 3" dia) surrounded by a larger pipe or about 6" dia?