Lochinvar & A.O. Smith 100208400 Pressure Switch
The Lochinvar & A.O. Smith 100208400 Pressure Switch is a critical OEM safety component engineered for high-efficiency condensing boilers and commercial water heaters. This low air pressure switch is factory-calibrated to a precise 3.20" WC (Water Column) set point, ensuring the inducer motor maintains proper static pressure before allowing the ignition sequence to proceed. Designed as a direct replacement for PRS2436 and 100166181, it integrates seamlessly with the control board to prevent hazardous operation during venting obstructions or inducer assembly failure. For technicians servicing Lochinvar Knight or A.O. Smith Cyclone series units, this genuine OEM part ensures internal logic compliance and maintains the specific pneumatic signaling required for HVAC combustion safety. Its robust diaphragm construction handles the rapid cycling demands of modern modulating heating systems while providing reliable electrical switching (SPST) to the 24V safety circuit.
Key Benefits:- Precise 3.20" WC Calibration: Ensures accurate air pressure sensing to prevent incomplete combustion or flue gas recirculation.
- OEM Compatibility: Exact fit for Lochinvar replacement parts across multiple models, including the PBN1002-F9 and various FB/FCB series boilers.
- Combustion Safety: Acts as a primary safety limit switch, cutting the gas valve circuit if the venting system fails to achieve sufficient vacuum.
- Durable Construction: Built to withstand the moisture and heat typical of high-efficiency condensing water heater environments.
- Will this fix a '3-flash' error code on my A.O. Smith water heater? A 3-flash code often indicates a 'Pressure Switch Failed Open' error. While a faulty 100208400 switch can cause this, technicians should also inspect the collector box tubing and inducer port for blockages before replacement.
- Can I use an adjustable universal switch instead? No. Heating systems requiring a 3.20" WC set point rely on precise millibar ratings for safe operation. Using a non-OEM or adjustable switch can lead to nuisance shutdowns or unsafe carbon monoxide levels.
- Is this switch compatible with LP and Natural Gas units? Yes, the 100208400 monitors air/flue pressure and is independent of the fuel type used by the burner.
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: $147.45
-65%$147.45
$51.61Lochinvar & A.O. Smith 100208400 Pressure Switch
The Lochinvar & A.O. Smith 100208400 Pressure Switch is a critical OEM safety component engineered for high-efficiency condensing boilers and commercial water heaters. This low air pressure switch is factory-calibrated to a precise 3.20" WC (Water Column) set point, ensuring the inducer motor maintains proper static pressure before allowing the ignition sequence to proceed. Designed as a direct replacement for PRS2436 and 100166181, it integrates seamlessly with the control board to prevent hazardous operation during venting obstructions or inducer assembly failure. For technicians servicing Lochinvar Knight or A.O. Smith Cyclone series units, this genuine OEM part ensures internal logic compliance and maintains the specific pneumatic signaling required for HVAC combustion safety. Its robust diaphragm construction handles the rapid cycling demands of modern modulating heating systems while providing reliable electrical switching (SPST) to the 24V safety circuit.
Key Benefits:- Precise 3.20" WC Calibration: Ensures accurate air pressure sensing to prevent incomplete combustion or flue gas recirculation.
- OEM Compatibility: Exact fit for Lochinvar replacement parts across multiple models, including the PBN1002-F9 and various FB/FCB series boilers.
- Combustion Safety: Acts as a primary safety limit switch, cutting the gas valve circuit if the venting system fails to achieve sufficient vacuum.
- Durable Construction: Built to withstand the moisture and heat typical of high-efficiency condensing water heater environments.
- Will this fix a '3-flash' error code on my A.O. Smith water heater? A 3-flash code often indicates a 'Pressure Switch Failed Open' error. While a faulty 100208400 switch can cause this, technicians should also inspect the collector box tubing and inducer port for blockages before replacement.
- Can I use an adjustable universal switch instead? No. Heating systems requiring a 3.20" WC set point rely on precise millibar ratings for safe operation. Using a non-OEM or adjustable switch can lead to nuisance shutdowns or unsafe carbon monoxide levels.
- Is this switch compatible with LP and Natural Gas units? Yes, the 100208400 monitors air/flue pressure and is independent of the fuel type used by the burner.
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 100208400 Pressure Switch is a critical OEM safety component engineered for high-efficiency condensing boilers and commercial water heaters. This low air pressure switch is factory-calibrated to a precise 3.20" WC (Water Column) set point, ensuring the inducer motor maintains proper static pressure before allowing the ignition sequence to proceed. Designed as a direct replacement for PRS2436 and 100166181, it integrates seamlessly with the control board to prevent hazardous operation during venting obstructions or inducer assembly failure. For technicians servicing Lochinvar Knight or A.O. Smith Cyclone series units, this genuine OEM part ensures internal logic compliance and maintains the specific pneumatic signaling required for HVAC combustion safety. Its robust diaphragm construction handles the rapid cycling demands of modern modulating heating systems while providing reliable electrical switching (SPST) to the 24V safety circuit.
Key Benefits:- Precise 3.20" WC Calibration: Ensures accurate air pressure sensing to prevent incomplete combustion or flue gas recirculation.
- OEM Compatibility: Exact fit for Lochinvar replacement parts across multiple models, including the PBN1002-F9 and various FB/FCB series boilers.
- Combustion Safety: Acts as a primary safety limit switch, cutting the gas valve circuit if the venting system fails to achieve sufficient vacuum.
- Durable Construction: Built to withstand the moisture and heat typical of high-efficiency condensing water heater environments.
- Will this fix a '3-flash' error code on my A.O. Smith water heater? A 3-flash code often indicates a 'Pressure Switch Failed Open' error. While a faulty 100208400 switch can cause this, technicians should also inspect the collector box tubing and inducer port for blockages before replacement.
- Can I use an adjustable universal switch instead? No. Heating systems requiring a 3.20" WC set point rely on precise millibar ratings for safe operation. Using a non-OEM or adjustable switch can lead to nuisance shutdowns or unsafe carbon monoxide levels.
- Is this switch compatible with LP and Natural Gas units? Yes, the 100208400 monitors air/flue pressure and is independent of the fuel type used by the burner.
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.
