Select from the list below if you are confident that the appliance has reached up to that point in the sequence correctly.

Observation:

FAN DOES NOT RUN WITH DHW DEMAND
PUMP DOES NOT RUN - FAN RUNS OK
BURNER DOES NOT IGNITE AND/OR ESTABLISH - FAN & PUMP RUN
DHW OPERATION UNSATISFACTORY (BURNER IGNITES)
BOILER DOES NOT RESPOND TO CH DEMAND - DHW OK
CH OPERATION UNSATISFACTORY - DHW OK