Hi all, need to replace my fan, no worries there, 3 screw a little bit of jiggery pokery and bingo. However, can anyone tell me if I get paste/ cement with the new fan to, I think, seal the flu and the pipe that, I think, goes to the air flow pressure switch. Also can anyone confirm that without sealing the flu and pipe my boiler will take longer to fire up, if at all.

Thanks.

isimpso4, January 2010