Normally Open/Normally Closed) is the direct cross-reference for Nordyne 621931

The A421AEC-01 automatically determines the mode based on the user-defined On and Off setpoints

the unit ensures constant run times regardless of load and incorporates electronic overload protection throughout its 95-degree rotation

engineered for 4-speed operation to provide versatile airflow control

the BFS series utilizes a knife edge to metal joint for a leak-proof seal

Trane BNR0970 Burner Assembly THPU32HP7Y Normally Open/Normally Closed) is theThe Trane BNR0970 Burner Assembly is a high performance SS 3 Burner Assembly engineered for HVAC gas furnace combustion in both residential and commercial applications. Constructed from premium grade stainless steel, this OEM Trane burner replacement is designed to provide superior corrosion resistance and longevity under high thermal stress. This 11 pound assembly features a 36 inch profile, housing three precision machined burners that ensure