Lochinvar L100279407 Flame Sensor Rear with Gasket

Product Description

The LOCHINVAR L100279407 is a rear-mounted flame sensor supplied with a gasket and mounting screws. Flame sensors are safety components in gas-fired heating equipment that detect the presence of a burner flame through flame rectification. When the flame signal is verified, the control board allows gas flow to continue. If the sensor fails to detect a flame, the board locks out the burner to prevent unburned gas accumulation. This assembly includes the sensor rod, gasket, and hardware needed for a complete replacement. It is serviced by licensed HVAC technicians during routine maintenance or in response to nuisance lockouts and ignition fault codes.

The L100279407 is designed for use in LOCHINVAR gas-fired boilers and water heaters that use a rear flame sensor configuration. It is a direct replacement component intended to restore proper flame detection and restore normal ignition control operation. Technicians typically encounter this part when a unit displays a flame-proving fault or when measured microamp signal output from the existing sensor has degraded below acceptable thresholds.

Key Features

• Rear-mounted flame sensor configuration for compatible LOCHINVAR heating equipment
• Supplied with gasket and mounting screws for a complete, hardware-included replacement
• Flame rectification sensor type for reliable burner flame verification
• OEM part number L100279407 ensures direct fitment and correct signal output
• Helps resolve nuisance lockouts and flame-proving fault codes

Compatibility

Designed as an OEM-style replacement rear flame sensor for compatible LOCHINVAR gas-fired boilers and water heaters. Confirm application against the unit service manual and existing part number before installation.

Installation Notes

Installation should be performed by a licensed HVAC or gas appliance technician in accordance with local codes and the equipment manufacturer service documentation. Shut off gas supply and disconnect electrical power to the unit before beginning any service work. The existing gasket should be replaced with the included gasket to ensure a proper combustion-side seal. After installation, verify flame signal microamp output using a digital multimeter to confirm the sensor is operating within the control board specifications.

Technical Specifications

• Component Type: Flame Sensor
• Mounting Position: Rear
• Included Hardware: Gasket and mounting screws

Standard Information

• Brand: LOCHINVAR
• Manufacturer Part Number: L100279407