Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Set Multimeter to Resistance 
CH Demand
Disconnect inline connector to flow switch
| WARNING! - Mains voltage is expected during test follow TOPs P4 live testing procedure |
Measurement:
Confirm pump is running.
Measure for resistance across the pins of inline connector which connects to the flow switch.
Expected resistance continuity (zero resistance).
Measure for resistance across the pins of inline connector which connects to the flow switch.
Expected resistance continuity (zero resistance).
Isolate as per TOPs P4
and refit as necessary