Specification

Single Stage HSI
Integrated Furnace Control
for PSC Blower Motors
Replace most 120V Lennox HSI single
stage furnace controls using a PSC
blower motor.
Versatile Installation
Pin to socket adapter harnesses
Two options for ame sense connection
Supports 24V or 120V humidier operation
Reduced Truck Stock
Replace 5 OEM boards and 28
cross references
Advanced Diagnostics
Simple push-button tri-color LED
Flame current test pads for easy
on-board checkout
50M56U-801 | LENNOX