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Goodman GMS80905CN Ignition Control Board
The main reason to have an ignition control board is that it oversees the main gas intake valve, the ignition timing and the flame sensing circuits. It is an important safety device that some companies have moved to be a standard part of the main board for enhanced safety.
General indicators that your the major ignition board is dead
- The electrical signal from the main thermostat never gets to the main control board
- The ignition cycle is unwilling to activate no matter what
- Any other potential problem in the HVAC system is inspected and seems to be flawless
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