Gas Limit Furnace Thermostat for Bryant, P331-2203, HH12ZA176A, HH12ZA174A

Gas Limit Furnace Thermostat | SHL501 L170-40F | Replaces Bryant P331-2203, HH12ZA176A, HH12ZA174A

Ensure safe and reliable furnace operation with this brand-new gas limit furnace thermostat. Designed to replace Bryant® part number P331-2203 and compatible with HH12ZA176A, HH12ZA174A, and other OEM references, this L170-40F thermostat helps regulate high-limit temperature cutoffs to prevent overheating. Ideal for residential and light commercial gas furnaces.

Features & Benefits:

• OEM-compatible replacement for L170-40F thermostats


• Opens at 170°F and resets at 130°F (40°F differential)


• Designed for use in gas furnaces and heating systems


• Durable construction for long-lasting performance


• Brand New – Unused and ready to install

Replaces Part Numbers:

P331-2203, HH12ZA176A, HH12ZA174A, L39-179

Fits Models:

Compatible with select Bryant and other OEM-branded gas furnaces. Please refer to your unit’s 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 furnace’s performance with this high-limit thermostat replacement.