Furnace Plenum Thermostat for Carrier, B1370012S

Gas Limit Furnace Thermostat | SHL518 | L250-40F | Replaces Carrier B1370012S, SWT1272, SWT1261, P331-2208, HH12ZA251, HH12ZB250

Ensure safe and efficient furnace operation with this brand-new SHL518 gas limit thermostat. Rated L250-40F, this high-limit switch opens at 250°F and resets at 210°F, helping prevent overheating in residential and light commercial gas furnaces. Designed to replace Carrier® part number B1370012S, it delivers dependable thermal protection and OEM-grade performance for consistent heating system safety.

⚙️ Features & Benefits:

• ✅ Opens at 250°F and resets at 210°F (40°F differential)
• Designed for use in gas furnaces and HVAC systems
• Durable construction with secure mounting tabs
• Brand New – Unused and ready to install
• Compact design for easy replacement and universal fit

Replaces Part Numbers:

B1370012S, L250-40F, SWT1272, SWT1261, P331-2208, HH12ZA251, HH12ZB250

✅ Fits Models:

Compatible with select Carrier gas furnace models. 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.