Trane KIT17858 HSI Control 30067439-890 and 100170537

and 100170537

The Carrier HH84AA020 Control Board is a genuine factory-authorized HVAC replacement circuit board designed for precise sequence control in Carrier

Precise Freeze Protection: Features a 20' sensing element to detect localized "cold spots" that shorter capillaries might miss

Technician-Friendly Design: Features extended 1 1/8" sweat connections for easier brazing in tight mechanical spaces

Trane KIT17858 HSI Control 30067439-890 and 100170537The Trane KIT17858 is a critical 24V 2 stage HSI control board designed for high performance furnace platforms requiring precise ignition sequencing and blower motor management. This integrated furnace control manages the hot surface igniter, gas valve timing, and multi speed inducer motors to ensure optimal combustion efficiency. Engineered as a direct OEM replacement kit, it provides seamless compatibility for technicians sourcing a Trane ignition