What does the mid-point ground mean for my wiring

This kit is a direct fit for Sterling TF series heaters (including TF100 through TF400 models) manufactured before 2005

Common Questions: Is the 8402-096BX a resettable limit switch

it is commonly found in Lennox XP and HP series heat pumps using 24V control logic

York 031-09161-000 Control Board 30067439-890 What does the mid-point groundThe York 031 09161 000 replacement is a critical integrated ignition control (ICM) designed for precise management of furnace sequence operations in Luxaire, Coleman, and York gas fired systems. This ignition control module regulates the inducer motor, hot surface igniter (HSI), and gas valve while monitoring safety circuits including limit switches and flame sensors. When troubleshooting furnace control board wiring, technicians should note that this