Potterton profile 60e not firing-up?

Try a squirt of WD40 on the fan bearings - "humming" may mean a stalled fan- motor windings OK but bearings gummed up.

As far as I know it is not possible to replace just the fan motor.

If the fan is not running then the air pressure switch does not operate - you can therefore discount any air pressure switch problems until the fan is working correctly.

I am not qualified or experienced with respect to boilers - my advice is next to worthless - Gas Safe Engineers sneer at me and call me an unqualified muppet - take my advice with caution.

Peccavi
July 2010