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Problem
LED Flashing
Is Air-Proving
Switch Shorted?
(Check Continuity on
Air-Proving Switch in
Open and Closed
Positions).
Yes
Repair Air-Proving Switch
One TTime
Flash PPattern
Begins
Immediately
After CCondition
Occurs.
Is Air Proving Switch
Stuck Closed?
Check Continuity.
Is Airflow Switch
Binding?
Repair.
Yes
Yes
No
No
Replace Air-Proving Switch
No
Defective Wire or Loose Connection
to Air-Proving Switch
Repair Wire or Connection