Set Appliance State:
Gas Off
| Isolate Mains Power to appliance as per TOPs P4 |
Remove the gas valve from side of the fan by undoing the three retaining screws and the union nut below the valve
Observation:
Separate (push fit) silencer from the rear of the air intake and inspect the air intake for restrictions or blockages.
Isolate as per TOPs P4
and refit as necessary