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Mitsubishi MSZ-FD09NA Ignition Control Board
The main reason to have an ignition control board is that it manages the main gas intake valve, the igniter and other important devices. It has been a very important device that, over the years, has merged to become a standard part of the main board for safety reasons.
Symptoms of a deteriorating chief ignition control board
- Communication from the remote thermostat never does reach the control board
- HVAC ignition cycle refuses to begin when it receives a proper signal
- Every other problem in the heating and cooling system is inspected and turns out to be good
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