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GREE MULTI18HP201 Ignition Control Board
The purpose of the ignition control board is that it manages the main gas intake valve, the ignition timing and all the flame sensing devices. It has always been a vital electronic safety board that some manufacturers have decided to blend to be a piece of the main circuit board instead of its own individual board.
Major indications of a weak main ignition board
- Communication from the home thermostat does not get to the main board
- Initial sequence is unable to fire up even when called upon
- Every other problem within the furnace checked out to be OK
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