Solenoid Valve Troubleshooting

INPUT GAS LINE

IN BACK CENTER

RETAINING SCREW

Retaining screw

OUTPUT

GAS LINES

DOUBLE SOLENOID VALVE

Disconnect the electrical power and follow lockout / tagout procedures

SYMPTOM – NO GAS FLOW TO BURNER

1.Check terminals for loose or greasy/dirty connections

2.Check gas pressure – check for orifice obstructions.

3.With thermostat, indicator light and power switch on – check for 120 voltage between the two terminals on the solenoid.

A.On pilot solenoid if no voltage – check wiring and on/off power switch

B.On main burner solenoid if no voltage – check wiring, safety ignition module and thermostat

4.If you have 120 voltage between the two terminals after performing steps 1- 3, replace the solenoid valve.

5.Check for a shorted coil by checking resistance between the two terminals with the wires disconnected. Readings of 100 ohms or less would indicate a shorted coil, replace the solenoid.

SOLENOID VALVE REMOVAL

Shut off gas supply

1.Remove the control panel.

2.Label and disconnect the wires to the solenoid terminals.

3.Remove the two retaining screws that are holding the valve body in the bracket.

4.Disconnect the input compression fitting and the output compression fitting(s).

5.Remove the solenoid valve

6.Reverse the procedure to install. Be careful to attach the input lines to the ports on the valve body that are stamped IN

7.Verify gas pressure and check for proper operation.

All gas joints disturbed during servicing must be checked for leaks. Check with a soap and water solution. Do not use an open flame.

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