Set Appliance State:

Isolate Mains Power to appliance as per TOPs P4
G.C. Number 47 044 26
Removal of Front Case
Remove bottom hinge screw and pull lower door panel forward and down to release it from the top hinge pin.

Slide the top panel up to release retaining clips.
Lift off top panel.
Removal of Combustion Chamber Cover
Remove four screws securing combustion chamber front cover.
Lift combustion chamber clear of top retaining lugs and pull forward.
Remove combustion chamber cover by first bringing the left side forward to clear boiler casing.