Burner Electrical Circuit Faulty - Travis Industries Spirit 300 GS Service Manual

Burner Electrical Circuit Faulty

The burner electrical circuit controls the main burner. If any item, including the wiring, is faulty, the
burner will not turn on. This also applies to any remote components (remote control, thermostat, wall
switch) used to operate the burner. Follow the steps below to diagnose the burner electrical circuit.
1 Make sure the pilot is burning and the gas control knob is turned to "ON". Remove the
brown and red wire connected to the top and bottom posts of the gas control valve.
Connect a jumper wire between the top and bottom posts. If the heaters turns on, the
burner electrical circuit is faulty - go to step 2 below. If the heater does not turn on (and
the thermocouple production is adequate) the head coil inside the gas control valve is
defective (replace the gas control valve).
2 Turn off the appliance and carefully inspect the burner electrical circuit wires for damage or
loose connections.
HINT: Keep in mind that millivolt circuits are very weak. Unlike 110 Volt circuits, a slightly loose
connection can interrupt the circuit and disable the burner. The most frequent cause for
faulty on/off circuits are connections that are loose or dirty. Remove, clean, and re-crimp
all connections before replacing components or wiring.
NOTE: If the wire insulation is melted and the wire contacts a metal surface, the on/off circuit will
ground out to the chassis of the heater and disable the main burner. Any wiring that is
exposed or severed should be replaced or properly insulated.
3 If no wiring is found damaged, turn on the pilot and trace the burner electrical circuit.
Keep one probe of the multimeter on the center post of the gas control valve while
systematically following the circuit. Start with the red wire leading to the on/off switch.
You should detect millivolts where it connects to the on/off switch. If it does not, replace
or re-connect the wire to fix the circuit. Repeat this process for the on/off switch, jumper
wire (or remote/thermostat), and brown wire until the bad connection is found.
Remedy
Replace or fix the faulty component.
Travis Industries
Troubleshooting Steps
1
Jumper Wire
PILOT ADJ
Gas Control Valve
Red
NOTE:
The switch may be connected to a
thermostat or remote control reciever.
Gas T-Shoot Guide
Brown
2
2
2 - 7
3
19203