ensuring the manifold pressure precisely matches the heating demand

including models manufactured before and after 1999

this switch ensures that your HVAC system remains protected without requiring a manual reset for minor ambient temperature fluctuations once the rollout condition is cleared

Engineered as the direct T605DFH-4 replacement

7-watt power rating provides the necessary electromagnetic force for reliable plunger seating and valve opening

Lennox 73K17 Limit Switch 322838-754 ensuring the manifold pressure preciselyAs an HVAC technician, you know that a failed limit switch is a primary cause for furnace short cycling and overheating. The Lennox 73K17 is a genuine OEM limit switch designed specifically for Lennox, Allied, Armstrong, and Ducane heating units. This SPST normally closed high limit control features a 7 inch insertion length, making it compatible with various air handlers and furnaces, such as the G23Q5 6 series. It operates as an auto reset limit