Furnace Plenum Thermostat for Lennox, Rheem, 47-21711-10, SHL524

Gas Limit Furnace Thermostat | SHL524 | Replaces Lennox 47-21711-10 | OEM-Compatible

Protect your furnace from overheating with this brand-new SHL524 gas limit thermostat. Engineered to replace Lennox® part number 47-21711-10, this high-limit switch interrupts burner operation when internal temperatures exceed safe thresholds. Built to OEM specifications, it ensures reliable thermal protection and consistent performance in residential and light commercial gas furnaces.

⚙️ Features & Benefits:

• ✅ OEM-compatible replacement for Lennox gas furnaces
• Opens at designated high-limit temperature to prevent overheating
• Durable construction with secure mounting tabs
• Brand New – Unused and ready to install
• Compact design for easy replacement and universal fit

Replaces Part Numbers:

47-21711-10

✅ Fits Models:

Compatible with select Lennox 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.