Lennox 27H87 Limit Switch Ensure the flame rollout sensor

Ensure the flame rollout sensor is correctly positioned according to the manufacturer's layout

The York S1-024-18785-700 Control Relay is an OEM replacement part designed for precise electrical circuit management in commercial and residential HVAC systems

maintaining precise primary air-to-fuel ratios to prevent nuisance lockouts and sooting

Precision Thermal Calibration: Ensures the York S1-025-26392-002 reacts accurately at its 160-degree threshold for optimal safety

replacing the assembly is a common solution

Lennox 27H87 Limit Switch Ensure the flame rollout sensorThe Lennox 27H87 Limit Switch is a critical OEM safety component engineered for precise thermal management in high performance heating systems. This 120 160F auto limit switch is specifically designed to monitor furnace plenum temperatures, providing a fail safe against overheating by interrupting the burner circuit if thresholds exceed the factory calibrated 160F limit. As a veteran grade HVAC replacement part, the 27H87 ensures seamless integration