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Fujitsu AOU18CL Ignition Control Board
An ignition control board keeps an eye on gas flow, the ignition ignitor and some other sensors. It is an important safety device that, over the years, has merged to become a part of the main control board for enhanced safety.
Key clues of a barely functioning chief ignition control board
- Ignition sequence fails to activate even when the thermostat kicks it on
- Communication from the remote thermostat does not turn up at the Fujitsu control board
- Every other problem within the heating and AC system is looked at and turns out to be problem-free
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