SUPCO SHL502 Thermostat,Limit & Plenum,Range 180-150F

Gas Limit Furnace Thermostat | SHL502 | L180-30F | Replaces Goodman, Carrier, Lennox

Ensure safe and efficient furnace operation with this brand-new SHL502 gas limit thermostat. Rated L180-30F, this high-limit switch is designed to open at 180°F and reset at 150°F, protecting your heating system from overheating. Compatible with select Goodman®, Carrier®, and Lennox® models, its a direct replacement for several OEM part numbers and ideal for residential and light commercial gas furnaces.

Features & Benefits:

• Opens at 180°F and resets at 150°F (30°F differential)


• Designed for use in gas furnaces and heating systems


• Durable construction for long-lasting performance


• Brand New Unused and ready to install


• Compact design for easy replacement and universal fit

Replaces Part Numbers:

B137001, HH12ZA178A, 26H6501, L39-180

Compatible Brands:

Goodman, Carrier, Lennox, and other OEM-branded gas furnaces. Please refer to your units service manual or model tag to confirm compatibility.

Installation Tips:

• Disconnect power and shut off gas supply before servicing


• Locate the existing limit thermostat on the furnace heat exchanger or plenum


• Remove mounting screws and disconnect wire terminals


• Install new thermostat in the same orientation and reconnect wires securely


• Restore power and gas, then test furnace operation and safety cutoff

Installation Disclaimer:

This furnace thermostat is intended for use by licensed HVAC technicians or individuals with proper heating system repair experience. Buyer is responsible for verifying compatibility and ensuring safe installation. Improper handling may result in equipment damage, fire hazard, or personal injury. Seller assumes no liability for misuse or incorrect application.

Reliable protection. OEM-grade safety. Restore your furnaces performance with this high-limit thermostat replacement.