The primary component in this kit is the 1177394 board

this SPDT (Single Pole Double Throw) switch ensures that the inducer motor or blower is generating the correct static pressure before allowing the ignition sequence to proceed

While ratings vary by temperature

common failure points in aftermarket universal alternatives

Trane ELM1405 Filter Element R-407C The primary component in thisThe Trane ELM1405 is a high performance Oil Refrigerant Filter Element engineered specifically for heavy duty industrial chilling applications, including the Trane RTHC Water Cooled Screw Chiller series. As an essential component for compressor protection, this filter removes particulate matter and moisture based contaminants from both the lubrication oil and the refrigerant cycle. Maintaining clean fluid flow is non negotiable for HVAC system