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Mitsubishi MUY-GE09NA Ignition Control Board
An ignition control board regulates the gas valve, the ignition timing and other safety devices built into the system. It is an important circuit board that is usually a major component of the main board instead of having two separate boards.
Subtle hints the ignition board is going to die
- The on-signal from the main thermostat never does reach the main control board
- Ignition sequence is unable to start even when the thermostat kicks it on
- Everything else throughout the system checks out all right
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