
Lochinvar & A.O. Smith 100278061 Wire
The Lochinvar & A.O. Smith 100278061 is a critical OEM replacement flame sensor wire harness engineered for precise signal transmission between the combustion chamber and the integrated control module. Designed specifically for high-efficiency hydronic systems, including the Lochinvar FTX400, FTX500, FTX600, and FTX725 series, this harness facilitates the microamp (µA) rectification signal necessary to prove flame presence. Proper flame sensing is the primary safety protocol that prevents the gas valve from remaining energized during a failed ignition sequence or flame dropout.
Built with high-temperature insulation to withstand the rigorous environment of a boiler's burner assembly, the 100278061 electrical wire ensures a low-resistance path to ground, eliminating nuisance lockouts caused by signal noise or electromagnetic interference. Utilizing this genuine Lochinvar flame sensor cable maintains the factory-specified sequence of operation and ensures compatibility with A.O. Smith commercial water heating platforms. For veteran contractors, this harness provides the reliable flame rectification connectivity required for long-term system stability and safety compliance.
Key Benefits for Technicians:
- Direct OEM Compatibility: Fits Lochinvar FTX models (400-725 L/N) and corresponding A.O. Smith commercial units without field modification.
- Enhanced Signal Integrity: Optimized for the 2.0 to 6.0 microamp range typical of Lochinvar flame sensor kits, reducing intermittent ignition failures.
- High-Heat Durability: The 100278061 wire harness features thermal-resistant jacketing to prevent insulation breakdown near the heat exchanger.
- Secure Connection: Precision-molded connectors ensure a tight fit at the sensor rod and the replacement control board terminal, preventing vibration-induced shorts.
Common Questions:
Will this harness fix a "No Flame Sensed" (Lockout) error?
If your multimeter shows correct microamps at the sensor but the signal isn't reaching the board, the 100278061 harness is likely the failure point due to internal resistance or a brittle connector.
Can I use this for both natural gas and propane (L/N) models?
Yes, this flame sensor electrode wire is compatible with both natural gas and liquid propane configurations for the listed FTX series.
Does this include the flame sensor rod?
This is the electrical wire harness only. If the ceramic insulator on your rod is cracked, you should purchase the Lochinvar 100165930 kit in addition to this harness.
This item is not eligible for free shipping.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
Original: $18.02
-65%$18.02
$6.31Lochinvar & A.O. Smith 100278061 Wire
The Lochinvar & A.O. Smith 100278061 is a critical OEM replacement flame sensor wire harness engineered for precise signal transmission between the combustion chamber and the integrated control module. Designed specifically for high-efficiency hydronic systems, including the Lochinvar FTX400, FTX500, FTX600, and FTX725 series, this harness facilitates the microamp (µA) rectification signal necessary to prove flame presence. Proper flame sensing is the primary safety protocol that prevents the gas valve from remaining energized during a failed ignition sequence or flame dropout.
Built with high-temperature insulation to withstand the rigorous environment of a boiler's burner assembly, the 100278061 electrical wire ensures a low-resistance path to ground, eliminating nuisance lockouts caused by signal noise or electromagnetic interference. Utilizing this genuine Lochinvar flame sensor cable maintains the factory-specified sequence of operation and ensures compatibility with A.O. Smith commercial water heating platforms. For veteran contractors, this harness provides the reliable flame rectification connectivity required for long-term system stability and safety compliance.
Key Benefits for Technicians:
- Direct OEM Compatibility: Fits Lochinvar FTX models (400-725 L/N) and corresponding A.O. Smith commercial units without field modification.
- Enhanced Signal Integrity: Optimized for the 2.0 to 6.0 microamp range typical of Lochinvar flame sensor kits, reducing intermittent ignition failures.
- High-Heat Durability: The 100278061 wire harness features thermal-resistant jacketing to prevent insulation breakdown near the heat exchanger.
- Secure Connection: Precision-molded connectors ensure a tight fit at the sensor rod and the replacement control board terminal, preventing vibration-induced shorts.
Common Questions:
Will this harness fix a "No Flame Sensed" (Lockout) error?
If your multimeter shows correct microamps at the sensor but the signal isn't reaching the board, the 100278061 harness is likely the failure point due to internal resistance or a brittle connector.
Can I use this for both natural gas and propane (L/N) models?
Yes, this flame sensor electrode wire is compatible with both natural gas and liquid propane configurations for the listed FTX series.
Does this include the flame sensor rod?
This is the electrical wire harness only. If the ceramic insulator on your rod is cracked, you should purchase the Lochinvar 100165930 kit in addition to this harness.
This item is not eligible for free shipping.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
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Description
The Lochinvar & A.O. Smith 100278061 is a critical OEM replacement flame sensor wire harness engineered for precise signal transmission between the combustion chamber and the integrated control module. Designed specifically for high-efficiency hydronic systems, including the Lochinvar FTX400, FTX500, FTX600, and FTX725 series, this harness facilitates the microamp (µA) rectification signal necessary to prove flame presence. Proper flame sensing is the primary safety protocol that prevents the gas valve from remaining energized during a failed ignition sequence or flame dropout.
Built with high-temperature insulation to withstand the rigorous environment of a boiler's burner assembly, the 100278061 electrical wire ensures a low-resistance path to ground, eliminating nuisance lockouts caused by signal noise or electromagnetic interference. Utilizing this genuine Lochinvar flame sensor cable maintains the factory-specified sequence of operation and ensures compatibility with A.O. Smith commercial water heating platforms. For veteran contractors, this harness provides the reliable flame rectification connectivity required for long-term system stability and safety compliance.
Key Benefits for Technicians:
- Direct OEM Compatibility: Fits Lochinvar FTX models (400-725 L/N) and corresponding A.O. Smith commercial units without field modification.
- Enhanced Signal Integrity: Optimized for the 2.0 to 6.0 microamp range typical of Lochinvar flame sensor kits, reducing intermittent ignition failures.
- High-Heat Durability: The 100278061 wire harness features thermal-resistant jacketing to prevent insulation breakdown near the heat exchanger.
- Secure Connection: Precision-molded connectors ensure a tight fit at the sensor rod and the replacement control board terminal, preventing vibration-induced shorts.
Common Questions:
Will this harness fix a "No Flame Sensed" (Lockout) error?
If your multimeter shows correct microamps at the sensor but the signal isn't reaching the board, the 100278061 harness is likely the failure point due to internal resistance or a brittle connector.
Can I use this for both natural gas and propane (L/N) models?
Yes, this flame sensor electrode wire is compatible with both natural gas and liquid propane configurations for the listed FTX series.
Does this include the flame sensor rod?
This is the electrical wire harness only. If the ceramic insulator on your rod is cracked, you should purchase the Lochinvar 100165930 kit in addition to this harness.
This item is not eligible for free shipping.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.












