Hi can anyone help with this? this seem to affect Ideal HE range of boilers, the boiler suddenly stops working going to lockout fault code F-L. after removing trap about 4Lts of water comes from within the boiler. the trap is full of gray coloured sludge (some form of aluminium oxide presumably). with trap removed condensate pipe check for blockages but is clear. boiler cover removed and burner/ heat exchanger sump cleaned out. after cleaning the trap the boiler works ok for about 3 month before locking out again has anyone else experienced this fault?