What is the difference between 311616 and 311616/U

preventing ice accumulation on the outdoor coil and maintaining high-efficiency thermal transfer

ensuring smooth mechanical linkage and consistent stroke

Contractors trust this Fenwal ignition wire for its exacting OEM specifications and compatibility with Series 05 and 35 control platforms

Precise Close-off: Meets ANSI Class IV standards

Lennox 83L91 Limit Switch 320734-701 What is the difference betweenThe Lennox 83L91 Limit Switch is a critical high limit safety component designed specifically for Lennox furnace systems, including the 10GCS and GCS29 series. This 185 215F Auto Limit Switch functions as a fail safe by monitoring internal plenum temperatures; it is calibrated to open the electrical circuit if temperatures exceed the 215F threshold and automatically reset once the system cools to 185F. Engineered for high duty cycles in commercial and