
Lochinvar & A.O. Smith 100210041 Pilot Thermopile Assembly
Maintaining a reliable flame signal is critical for the safe and efficient operation of gas-fired water heaters and boilers. The Lochinvar & A.O. Smith 100210041 Pilot Thermopile Assembly is a genuine OEM replacement part engineered to convert thermal energy from the pilot flame into a DC millivolt signal. This high-output thermopile generator ensures the gas valve solenoid remains energized, preventing safety shutdowns and intermittent burner cycling. This assembly is a direct solution for water heater pilot light issues where the main burner fails to ignite despite a standing pilot. Designed for exact fitment, this pilot thermopile assembly features a robust lead wire construction and a high-sensitivity sensor tip optimized for millivolt gas valve systems. Whether you are performing a routine HVAC pilot replacement or troubleshooting a faulty thermopile on a Lochinvar or A.O. Smith unit, this OEM assembly provides the precise electrical output required to maintain system stability and safety compliance on the job site.
- OEM Reliability: Genuine Lochinvar and A.O. Smith parts ensure factory-spec millivolt output and terminal compatibility.
- Precise Signal Generation: The 750mV thermopile design provides a consistent voltage to keep the main gas valve operational under heavy demand.
- Direct Fit Installation: Eliminates the need for field modifications, reducing labor time for hot water heater repair.
- Enhanced Safety: Rapidly detects pilot outages to trigger immediate gas shutoff, protecting the equipment and the facility.
Common Questions
How do I know if the thermopile or the gas valve is failing?
Use a multimeter to check the DC millivolts at the gas valve terminals while the pilot is lit. If the thermopile voltage is consistently below 350mV under load, the assembly likely needs replacement.
Is this part compatible with both Natural Gas and Propane units?
Yes, this pilot assembly is designed to operate within the combustion chambers of both NG and LP models, provided the part number matches your specific water heater or boiler manifold requirements.
What causes a thermopile to stop working?
Soot buildup, oxidation on the sensor tip, or a cracked internal ceramic insulator are common causes. If cleaning the tip with fine steel wool does not restore the millivolt signal, the internal thermopile leads have likely degraded.
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.
Lochinvar & A.O. Smith 100210041 Pilot Thermopile Assembly
Maintaining a reliable flame signal is critical for the safe and efficient operation of gas-fired water heaters and boilers. The Lochinvar & A.O. Smith 100210041 Pilot Thermopile Assembly is a genuine OEM replacement part engineered to convert thermal energy from the pilot flame into a DC millivolt signal. This high-output thermopile generator ensures the gas valve solenoid remains energized, preventing safety shutdowns and intermittent burner cycling. This assembly is a direct solution for water heater pilot light issues where the main burner fails to ignite despite a standing pilot. Designed for exact fitment, this pilot thermopile assembly features a robust lead wire construction and a high-sensitivity sensor tip optimized for millivolt gas valve systems. Whether you are performing a routine HVAC pilot replacement or troubleshooting a faulty thermopile on a Lochinvar or A.O. Smith unit, this OEM assembly provides the precise electrical output required to maintain system stability and safety compliance on the job site.
- OEM Reliability: Genuine Lochinvar and A.O. Smith parts ensure factory-spec millivolt output and terminal compatibility.
- Precise Signal Generation: The 750mV thermopile design provides a consistent voltage to keep the main gas valve operational under heavy demand.
- Direct Fit Installation: Eliminates the need for field modifications, reducing labor time for hot water heater repair.
- Enhanced Safety: Rapidly detects pilot outages to trigger immediate gas shutoff, protecting the equipment and the facility.
Common Questions
How do I know if the thermopile or the gas valve is failing?
Use a multimeter to check the DC millivolts at the gas valve terminals while the pilot is lit. If the thermopile voltage is consistently below 350mV under load, the assembly likely needs replacement.
Is this part compatible with both Natural Gas and Propane units?
Yes, this pilot assembly is designed to operate within the combustion chambers of both NG and LP models, provided the part number matches your specific water heater or boiler manifold requirements.
What causes a thermopile to stop working?
Soot buildup, oxidation on the sensor tip, or a cracked internal ceramic insulator are common causes. If cleaning the tip with fine steel wool does not restore the millivolt signal, the internal thermopile leads have likely degraded.
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.
Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
Maintaining a reliable flame signal is critical for the safe and efficient operation of gas-fired water heaters and boilers. The Lochinvar & A.O. Smith 100210041 Pilot Thermopile Assembly is a genuine OEM replacement part engineered to convert thermal energy from the pilot flame into a DC millivolt signal. This high-output thermopile generator ensures the gas valve solenoid remains energized, preventing safety shutdowns and intermittent burner cycling. This assembly is a direct solution for water heater pilot light issues where the main burner fails to ignite despite a standing pilot. Designed for exact fitment, this pilot thermopile assembly features a robust lead wire construction and a high-sensitivity sensor tip optimized for millivolt gas valve systems. Whether you are performing a routine HVAC pilot replacement or troubleshooting a faulty thermopile on a Lochinvar or A.O. Smith unit, this OEM assembly provides the precise electrical output required to maintain system stability and safety compliance on the job site.
- OEM Reliability: Genuine Lochinvar and A.O. Smith parts ensure factory-spec millivolt output and terminal compatibility.
- Precise Signal Generation: The 750mV thermopile design provides a consistent voltage to keep the main gas valve operational under heavy demand.
- Direct Fit Installation: Eliminates the need for field modifications, reducing labor time for hot water heater repair.
- Enhanced Safety: Rapidly detects pilot outages to trigger immediate gas shutoff, protecting the equipment and the facility.
Common Questions
How do I know if the thermopile or the gas valve is failing?
Use a multimeter to check the DC millivolts at the gas valve terminals while the pilot is lit. If the thermopile voltage is consistently below 350mV under load, the assembly likely needs replacement.
Is this part compatible with both Natural Gas and Propane units?
Yes, this pilot assembly is designed to operate within the combustion chambers of both NG and LP models, provided the part number matches your specific water heater or boiler manifold requirements.
What causes a thermopile to stop working?
Soot buildup, oxidation on the sensor tip, or a cracked internal ceramic insulator are common causes. If cleaning the tip with fine steel wool does not restore the millivolt signal, the internal thermopile leads have likely degraded.
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.












