This kit is specifically designed for Friedrich residential furnaces

normally closed (N/C) coil

Using the OEM S1-025-27727-003 ensures the system operates within the designed safety parameters of the control board

it features a 1/4" barbed connection for secure pneumatic tubing attachment

Johnson Controls S350AA-1 Module 30067439-890 This kit is specifically designedThe Johnson Controls S350AA 1 is a precision Temperature Stage Module engineered to expand the control capabilities of the System 350 modular architecture. This unit, which is functionally identical to the S350AA 1C, operates on the Fahrenheit scale and features SPDT enclosed relays for reliable switching in commercial HVACR applications. Power is supplied directly via the A350 Control Module, eliminating the need for independent external