and TH8321 VisionPRO models

For contractors servicing mobile home furnaces or residential air handlers

It is commonly used as a universal large-format guard for various 24V control brands

This specific York temperature limit switch is typically utilized in 24V control circuits

Correct installation requires ensuring the groove is free of debris and lightly lubricated with system-compatible oil to prevent twisting or binding during assembly

Copeland Comfort Control (White Rodgers) 3L09-12 Limit Switch and TH8321 VisionPRO modelsThe Copeland Comfort Control (White Rodgers) 3L09 12 Limit Switch is a high reliability 1 2" bimetal disc limit control engineered for precision high limit protection in residential and commercial furnaces. This board mounted HVAC limit switch features a fixed open temperature of 220F and a fixed close temperature of 180F. Operating on an open on rise switch action, it serves as a critical safety component to prevent heat exchanger damage or hazardous