Lennox 27W71 Motor 318518-761 it is optimized for both

it is optimized for both Hot Surface Ignition (HSI) and Direct Spark Ignition (DSI) systems

also identified by manufacturer number 3NT01L-04002

eliminating the need for a separate external amplifier

this is an official Daikin-McQuay OEM part

and AKV series valves

Lennox 27W71 Motor 318518-761 it is optimized for bothWhen you're out in the field and a furnace fan starts "dancing" or failing to ramp up under load, you're likely looking at a compromised Lennox 27W71 Motor. This 1 2 HP ECM Blower Motor is an OEM replacement designed to handle the variable static pressure demands of high efficiency Lennox furnace and air handler units. Operating at 208 230V, this Genteq X13 constant torque motor replaces the older Lennox 101207 01 and features a 5 speed brushless DC