Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Remove the air intake from the fan
Disconnect wires from flow sensor
Disconnect wires from flow sensor
Measurement:
Measure the resistance across the flow sensor.
The resistance should conform approximately to the table below:
The resistance should conform approximately to the table below:

Isolate as per TOPs P4
and refit as necessary