WARM AIR FURNACE
TROUBLESHOOTING
SEQUENCE OF OPERATION: WHITE RODGERS INTEGRATED FURNACE CONTROL WITH WHITE RODGERS 36G22 GAS VALVE
APPLY POWER TO APPLIANCE
THERMOSTAT CALLS FOR HEAT
AIR PROVING SWITCH PROVED OPEN?
YES
COMBUSTION AIR BLOWER ON
AIR PROVING SWITCH PROVED CLOSED
YES
NO
NO
WAIT FOR AIR PROVING SWITCH TO OPEN
FIVE MINUTE WAIT PERIOD
COMBUSTION AIR BLOWER OFF
PREPURGE
HOT SURFACE IGNITER ON FOR
MAIN VALVE OPENS
HOT SURFACE IGNITER OFF
MAIN BURNER LIGHTS AND IS SENSED DURING TRIAL FOR IGNITION?
YES
CIRCULATING AIR FAN ON AFTER DELAY
FLAME SENSE LOST?
NO
THERMOSTAT CALL FOR HEAT ENDS
MAIN VALVE CLOSES
COMBUSTION AIR BLOWER OFF AFTER POST PURGE
NO
YES
BETWEEN TRIAL PURGE
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MAIN VALVE CLOSES |
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YES |
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| YES |
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TRIALS FOR IGNITION LESS THAN FOUR | COMBUSTION AIR BLOWER OFF | |||||||
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DURNG THIS IGNITION SEQUENCE? |
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NO |
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MAIN VALVE CLOSES |
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| NO |
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FLAME SENSE LOST MORE THAN FIVE |
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TIMES IN THIS CALL FOR HEAT? |
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| YES |
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CIRCULATING AIR FAN OFF AFTER DELAY
WAIT FOR NEXT CALL FOR HEAT
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