
Lochinvar & A.O. Smith 100112327 Thermopile
The Lochinvar & A.O. Smith 100112327 Thermopile is a critical 750-millivolt (mV) generator designed for high-performance gas-fired water heaters and boilers. Engineered to withstand the rigorous heat of a continuous pilot flame, this OEM replacement thermopile converts thermal energy into a stable electrical current to power the gas control valve without an external power source. This model is a direct successor to legacy part numbers including 9007872005, 100093986, and 316975-000, ensuring a precise fit in residential electric and gas series such as the Lochinvar MFN and A.O. Smith Energy Saver models. With a sensor length of 1.5 inches and lead lengths ranging from 15 to 25 inches, it provides the versatility needed for various combustion chamber configurations. For field technicians, this 750mV pilot generator is the standard for restoring reliable ignition and safety circuit integrity in millivolt systems, preventing nuisance shutdowns caused by weakened pilot signals.
Key Benefits- Direct OEM Compatibility: Engineered specifically for A.O. Smith, Lochinvar, State, and American Water Heater units to ensure proper voltage output.
- Broad Application Range: Replaces multiple legacy part numbers including 9007872005 and 100078036 for simplified inventory management.
- Stable 750mV Output: Delivers consistent millivoltage to operate main gas valves in standing pilot systems efficiently.
- Durable Construction: Built to endure the high-temperature environment of the pilot assembly, extending the service life of the water heater thermopile.
- Precision Lead Length: Includes flexible leads (15"–25") and a retainer clip for secure installation within the burner tray.
What are the symptoms of a failing 100112327 thermopile?
A failing unit typically results in the pilot light staying lit while the button is depressed but extinguishing immediately after release, or the main burner failing to ignite despite a healthy pilot flame. This usually indicates the 750mV generator is no longer producing the minimum required voltage to hold the gas valve open.
Is this part interchangeable with standard thermocouples?
No. While they look similar, a thermocouple produces approximately 30mV, whereas this 750mv thermopile is a thermopile generator designed for millivolt control systems. Always verify the voltage requirement of your gas control valve before installation.
Which specific models does this part fit?
This part is a confirmed fit for several series, including Lochinvar MFN03035, MFN04035, and the GS/GT 030-050 Energy Saver residential gas units. It is also found in many A.O. Smith manufactured home models.
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: $48.59
-65%$48.59
$17.01Lochinvar & A.O. Smith 100112327 Thermopile
The Lochinvar & A.O. Smith 100112327 Thermopile is a critical 750-millivolt (mV) generator designed for high-performance gas-fired water heaters and boilers. Engineered to withstand the rigorous heat of a continuous pilot flame, this OEM replacement thermopile converts thermal energy into a stable electrical current to power the gas control valve without an external power source. This model is a direct successor to legacy part numbers including 9007872005, 100093986, and 316975-000, ensuring a precise fit in residential electric and gas series such as the Lochinvar MFN and A.O. Smith Energy Saver models. With a sensor length of 1.5 inches and lead lengths ranging from 15 to 25 inches, it provides the versatility needed for various combustion chamber configurations. For field technicians, this 750mV pilot generator is the standard for restoring reliable ignition and safety circuit integrity in millivolt systems, preventing nuisance shutdowns caused by weakened pilot signals.
Key Benefits- Direct OEM Compatibility: Engineered specifically for A.O. Smith, Lochinvar, State, and American Water Heater units to ensure proper voltage output.
- Broad Application Range: Replaces multiple legacy part numbers including 9007872005 and 100078036 for simplified inventory management.
- Stable 750mV Output: Delivers consistent millivoltage to operate main gas valves in standing pilot systems efficiently.
- Durable Construction: Built to endure the high-temperature environment of the pilot assembly, extending the service life of the water heater thermopile.
- Precision Lead Length: Includes flexible leads (15"–25") and a retainer clip for secure installation within the burner tray.
What are the symptoms of a failing 100112327 thermopile?
A failing unit typically results in the pilot light staying lit while the button is depressed but extinguishing immediately after release, or the main burner failing to ignite despite a healthy pilot flame. This usually indicates the 750mV generator is no longer producing the minimum required voltage to hold the gas valve open.
Is this part interchangeable with standard thermocouples?
No. While they look similar, a thermocouple produces approximately 30mV, whereas this 750mv thermopile is a thermopile generator designed for millivolt control systems. Always verify the voltage requirement of your gas control valve before installation.
Which specific models does this part fit?
This part is a confirmed fit for several series, including Lochinvar MFN03035, MFN04035, and the GS/GT 030-050 Energy Saver residential gas units. It is also found in many A.O. Smith manufactured home models.
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 100112327 Thermopile is a critical 750-millivolt (mV) generator designed for high-performance gas-fired water heaters and boilers. Engineered to withstand the rigorous heat of a continuous pilot flame, this OEM replacement thermopile converts thermal energy into a stable electrical current to power the gas control valve without an external power source. This model is a direct successor to legacy part numbers including 9007872005, 100093986, and 316975-000, ensuring a precise fit in residential electric and gas series such as the Lochinvar MFN and A.O. Smith Energy Saver models. With a sensor length of 1.5 inches and lead lengths ranging from 15 to 25 inches, it provides the versatility needed for various combustion chamber configurations. For field technicians, this 750mV pilot generator is the standard for restoring reliable ignition and safety circuit integrity in millivolt systems, preventing nuisance shutdowns caused by weakened pilot signals.
Key Benefits- Direct OEM Compatibility: Engineered specifically for A.O. Smith, Lochinvar, State, and American Water Heater units to ensure proper voltage output.
- Broad Application Range: Replaces multiple legacy part numbers including 9007872005 and 100078036 for simplified inventory management.
- Stable 750mV Output: Delivers consistent millivoltage to operate main gas valves in standing pilot systems efficiently.
- Durable Construction: Built to endure the high-temperature environment of the pilot assembly, extending the service life of the water heater thermopile.
- Precision Lead Length: Includes flexible leads (15"–25") and a retainer clip for secure installation within the burner tray.
What are the symptoms of a failing 100112327 thermopile?
A failing unit typically results in the pilot light staying lit while the button is depressed but extinguishing immediately after release, or the main burner failing to ignite despite a healthy pilot flame. This usually indicates the 750mV generator is no longer producing the minimum required voltage to hold the gas valve open.
Is this part interchangeable with standard thermocouples?
No. While they look similar, a thermocouple produces approximately 30mV, whereas this 750mv thermopile is a thermopile generator designed for millivolt control systems. Always verify the voltage requirement of your gas control valve before installation.
Which specific models does this part fit?
This part is a confirmed fit for several series, including Lochinvar MFN03035, MFN04035, and the GS/GT 030-050 Energy Saver residential gas units. It is also found in many A.O. Smith manufactured home models.
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.












