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International Comfort Products PHAD42N1K4 Ignition Control Board
An ignition control board oversees gas intake, the ignition ignitor and some other sensors. The ignition control board was always an important circuit board that has now become a standard part of the main board instead of its own individual board.
What are the signs that the ignition board is on its last leg?
- Communication from the thermostat never gets to the control board
- Any other potential problem within the furnace is looked at and turns out to be a-OK
- Initial sequence does not fire up even when the thermostat kicks it on
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