Supco SHL524 Plenum Limit Thermostat 150-170°F L170-20F 7" Insertion

The Supco SHL524 is a high-quality plenum limit thermostat designed for gas furnace and HVAC applications requiring reliable temperature control. This compact bimetal temperature control features an L170-20F configuration, opening at 170°F and closing at 150°F with a 20-degree differential.

Key Features:

• Temperature Range: Opens at 170°F, closes at 150°F (20°F differential)
• Extended 7-inch insertion length for deep plenum applications
• Compact mounting footprint: 1.88" width x 2.80" height
• UL listed for safety and reliability
• Direct replacement for Rheem 47-21711-10
• SPST switching configuration for simple wiring

This plenum thermostat is commonly used as a safety limit switch in residential and light commercial HVAC systems to prevent overheating. The automatic reset design closes the circuit when temperature drops back below 150°F, allowing normal furnace operation to resume. Manufactured by Sealed Unit Parts Company (Supco), a trusted name in HVACR replacement components since 1945.