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

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