TROUBLE SHOOTING THE GAS CONTROL SYSTEM
HONEYWELL MILLIVOLT VALVE
START
¥ GAS SUPPLY ON
YES
PILOT LIGHTS WITH PIEZO IGNITOR
YES
PILOT STAYS LIT
YES
PILOT LIGHTS MAIN BURNER
YES
SYSTEM OK.
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| CHECK |
NO |
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| ¥ SUPPLY LINE HOOKED UP | |
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| ¥ SHUTOFF VALVE OPEN |
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| ¥ LOCKOUT HAS ENGAGED. WAIT |
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| 60 SECONDS AND TRY AGAIN. |
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| ¥ FOR SPARK AT ELECTRODE |
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| WHILE DEPRESSING PIEZO |
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| Ñ 1/8" GAP TO |
NO |
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| PILOT HOOD NEEDED. |
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¥ALL WIRING CONNECTIONS
¥REPLACE PIEZO IGNITOR
¥FOR AIR IN THE LINES
¥THERMOPILE NEEDS A MINIMUM 325mV. ADJUST PILOT FLAME HEIGHT.
¥ALL WIRING CONNECTIONS.
NO 
¥ REPLACE THERMOPILE
¥THERMOCOUPLE NEEDS A MINIMUM OF 14mV.
¥DEFECTIVE VALVE. TURN TO PILOT, METER SHOULD READ GREATER THAN 100 mV. IF NOT, REPLACE.
¥VALVE IS TURNED ON
¥ON/OFF SWITCH IS NOT
TURNED ON. WATCH
NO 
FOR GROUNDED WIRES!
¥THERMOPILE NEEDS A MINIMUM 325mV.
¥PLUGGED BURNER ORIFICE.
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