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Gas does not ignite. No spark. No Ignition light is not ON.
1. Shorted electrode on igniter/flame sense.
2. Igniter cable (high voltage) OPEN.
3. Heat relay malfunction.
4. Centrifugal switch in blower motor inoperative.
5. Transformer inoperative.
6. High limit thermostat open.
7. Interconnecting wiring malfunction.
8. Ignition module malfunction.
Sparks but gas does not ignite.
1. Gas solenoid valve off or inoperative.
2. Manual gas valve closed.
3. Gas supply OFF or insufficient gas pressure.
4. Inerconnecting wiring malfunction.
5. Igniton module malfunction.
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