and rooftop units under varied load conditions

Enhanced Durability: The integrated metal enclosure protects the sensitive bellows and electrical contacts from harsh mechanical room environments

A 3-flash sequence typically indicates an ignition lockout

By utilizing an authentic Trane replacement part

Rugged Construction: Built with high-grade materials to withstand the thermal cycling common in industrial HVAC high-temperature safety applications

Trane KIT17858 HSI Control Els PW 17895 and rooftop units under variedThe 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