Lennox 45M66 Collar Assembly 322838-754 Constructed with a magnetic clutch

Constructed with a magnetic clutch

If you have verified that the line voltage is correct but the secondary output is below 24V

preventing damage to downstream electronics during a short circuit

As the direct replacement for the H91DG-2

How do I verify if the 1173838 is compatible with my current HK42FZ017 or similar older revision

Lennox 45M66 Collar Assembly 322838-754 Constructed with a magnetic clutchThe Lennox 45M66 Collar Assembly is an essential OEM replacement part designed specifically for high efficiency HVAC cabinet and ductwork transitions. This Right Hand Collar Assembly (part number LB 96380A) provides the structural interface required to maintain rigid connections at the unit discharge or return plenum, ensuring no static pressure loss at critical junction points. Manufactured to original Lennox HVAC equipment tolerances, the 45M66