Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Disconnect both air pressure switch tubes from the venturi and record the position of each tube
Remove the fan by removing the two fixing screws (as indicated by red arrows in the adjacent photograph) and lifting down and forward
Remove the fan by removing the two fixing screws (as indicated by red arrows in the adjacent photograph) and lifting down and forward
Observation:
Remove the venturi from the fan
and inspect for a blockage.
and inspect for a blockage.
Isolate as per TOPs P4
and refit as necessary