HH18HA416 Flame Rollout Limit Switch L215F Manual Reset Compatible with Carrier, Bryant Payne Furnaces

The HH18HA416 flame rollout limit switch is a safety-critical component designed to monitor temperatures surrounding furnace burners, preventing hazardous overheating in heating systems. As a normally closed SPST (Single Pole Single Throw) switch, it maintains a closed circuit under normal operating conditions. When burner zone temperatures rise to 215°F—typically caused by inducer fan failure, restricted exhaust vents, or insufficient airflow—the switch opens to interrupt the ignition sequence, shutting down the furnace to prevent damage or safety risks. Key Functionality： This L215F thermostat requires manual reset via its integrated button after temperatures cool, ensuring users inspect and resolve underlying issues (such as blocked vents or soot buildup) before restoring operation. This safety mechanism prevents automatic restarting of potentially hazardous systems. The switch features a ceramic body engineered to withstand high heat without degradation, enhancing long-term reliability in harsh furnace environments. Compatibility & Replacement： This switch directly replaces obsolete part numbers including 316418401, 318198932, AP4556791, and PS2581859. It is designed for use with specific furnace models from Carrier, Bryant Payne, and Electrolux-manufactured units (verify your furnace’s exact model against manufacturer specifications for compatibility). Technical Specifications： Temperature Activation: Opens on rise at 215°F Circuit Design: Normally closed SPST Reset Type: Manual button activation Installation Notes： 1. Always shut off furnace power before installation. 2. Disconnect wires from old switch and connect to new switch terminals. 3. Secure switch using existing mounting hardware, ensuring proper alignment with burner housing. 4. After installation, test operation and confirm switch resets correctly before full system use. Package includes 1 x HH18HA416 flame rollout limit switch

• Normally closed SPST design：Opens circuit at 215°F to halt ignition sequence during burner overheating from poor ventilation or blocked vents
• Manual reset mechanism：Requires physical button activation after cooling to ensure inspection of root overheating causes
• Direct replacement part：Compatible with 316418401, 318198932, AP4556791, PS2581859 for seamless part swap
• Draft safety switch function：Monitors airflow around burners to prevent flame rollout risks in heating systems
• Continuity-testable diagnosis：Checks for defects via multimeter (lack of continuity indicates the switch needs replacement)