Set Appliance State:

Mains Power Off
CH Demand
WARNING! - Mains voltage is expected during test follow
TOPs P4 live testing procedure
Mains Power On

Measurement:

Reset appliance as necessary and observe fan and "U” gauge.
Expect the following sequence of events:
After approx.12 seconds fan runs, after approx. 24 seconds sparking commences and gas valve opens, burner then ignites and establishes (remains alight).
Click on your observation:
1. FAN RUNS BURNER IGNITES AND ESTABLISHES

2. FAN DOES NOT RUN
3. FAN RUNS SPARKING DOES NOT OCCUR

4. FAN RUNS SPARKING OCCURS BURNER DOES NOT IGNITE
5. BURNER IGNITES BUT DOES NOT ESTABLISH

6. BURNER IGNITES BUT BAFFLES OUT OR FLAME LIFTS OFF