Verify that the protective cover on Microboard connector U33 is secure and that the program jumpers (specifically JP6) are correctly configured per the York Service Manual for your specific chiller model

followed by a 60-minute retry logic if a flame is not sensed

What causes this igniter/flame rod to fail

if your current unit specifies part 1177609 or is a 3/4 HP variable speed motor with a 1/2" shaft and CCW rotation

this three-phase blower motor supports dual-voltage configurations of 208-230/460Vac

Williams 6912 Combustion Chamber Kit 318973-401 Verify that the protective coverThe Williams 6912 Combustion Chamber Kit is a critical replacement assembly designed for Williams Monterey top vent wall furnaces. This kit restores the integrity of the heat exchange process, ensuring safe venting of flue gases and optimal thermal transfer. Engineered for high temperature durability, the 6912 combustion chamber addresses common failure points such as stress cracks or burn through in aged wall furnace heat exchangers. As a direct OEM