Supco SHL502 Gas Furnace Limit Thermostat L180-30F

The Supco SHL502 is a premium bimetal gas furnace limit thermostat designed to provide reliable overheat protection for residential and light commercial HVAC systems. This SPST (single-pole, single-throw) automatic reset limit switch features open-on-rise switching action that opens at 180°F and automatically closes at 150°F, providing a 30°F differential for optimal furnace safety control.

Key Specifications:

• Switch opens at 180°F, closes at 150°F (L180-30F rating)
• Automatic reset design for continuous protection
• 3.12-inch insertion length for proper plenum mounting
• Compact dimensions: 2.8" H x 1.88" W
• Multi-voltage rated: 120V/240V AC operation
• Resistive load capacity: 15A @ 120V, 10A @ 240V
• Inductive load capacity: 3A @ 120V, 1.5A @ 240V
• UL recognized and CSA certified

OEM Replacement Cross-References: This limit thermostat directly replaces Carrier B1370001, Bryant HH12ZA178A, and Goodman B1370001. It offers an economical, high-quality alternative to OEM parts while maintaining the same reliability and performance standards.

The SHL502 is part of Supco's proven SHL series of 1/2" bimetal temperature controls, engineered for versatile plenum-mount applications in gas furnaces. The insertion-type element ensures accurate temperature sensing, while the automatic reset feature eliminates the need for manual intervention after a limit trip event.