White-Rodgers 3L03-140 Heating Snap Disc Limit Control

The White-Rodgers 3L03-140 Heating Snap Disc Limit Control is a reliable SPDT snap-disc switch designed for furnace and blower safety.

This Therm-O-Disc style limit control (60T13, Type 611015) uses a 3/4 inch flanged airstream mounting for secure installation and accurate sensing. It offers 120/240 VAC full-load operation, with resistive/pilot duty ratings up to 277 VAC for versatility in heating systems.

Temperature sensing is precise: cut-in at 140/190°F and cut-out at 120/170°F, ensuring safe operation and equipment protection. Its robust electrical ratings support dependable performance in blower and high‑limit safety control duties.

• Type: Snap Disc Limit Control with SPDT switch
• Mounting: 3/4 inch flanged airstream mount
• Electrical: 120/240 VAC full-load; resistive/pilot duty up to 277 VAC
• Currents: current ratings suitable for common blower/heating circuits (up to 25 A resistive at 120/240 V)
• Temperature: cut-in 140/190°F; cut-out 120/170°F
• Applications: ideal for blower safety control and high-limit safety in HVAC heaters