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

⚠️ 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 furnace’s performance with this high-limit thermostat replacement.