Set Appliance State:

Isolate Mains Power to appliance as per TOPs P4
Set Multimeter to Resistance Set meter to measure resistance
Remove the wires from terminals 3 and 4 on the integral timer
Timer set to ON

Measurement:

Measure the resistance between terminals 3 and 4 of the integral timer.
Expect continuity / zero resistance.
Is the resistance measured as expected?