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Mitsubishi MSZ-GE12NA Ignition Control Board
An ignition control board checks out the natural gas, the ignition ignitor and the flame sensing circuits. It is an important device that some companies have moved to be a part of the main control board instead of its own individual board.
Symptoms your main ignition board will eventually need to be replaced
- The on-signal from the thermostat never turns up at the Mitsubishi control board
- HVAC ignition cycle does not kick in even when the thermostat kicks it on
- Every other problem in the HVAC system is looked at and turns out to be a-OK
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