Set Appliance State:

Mains Power Off
Set Multimeter to DC Volts Set meter to measure DC Volts
CH temperature control to max
Remove control box cover
ON/OFF switch in the ON position
WARNING! Mains voltage is expected during test, follow TOPs P4 live testing procedure
Mains Power On

Measurement:

Measure DC voltage across the terminals 3 and 5 on the Timer.
Expect approx. 0Vdc across the terminals.