WHICH MODEL IS IT? IS IT THE 1 WHERE THE WIRES GO INTO A TERMINAL BLOCK ON TOP? IF SO, YOU REMOVE THE CASE, THEN COMBUSTION COVER AS YOU HAVE THEN JUST HOLD ON TO THE COVER/PLATE THE FAN SITS ON THEN SLIDE FORWARD.
I SHOULD INFORM YOU THAT BY REMOVING THE COVER YOU HAVE NOW CONTRAVENED GAS SAFETY REGS AS UNLESS YOU ARE CORGI REGISTERED YOU HAVE NO WAY OF TESTING THE CASE SEAL AND LEAVE YOURSELF OPEN TO THE PERILS OF CARBON MONOXIDE.
GAS IS NOT FOR D.I.Y BODGERS.
MIKE, November 2006