Lochinvar & A.O. Smith 100276842 Pressure Switch
The Lochinvar & A.O. Smith 100276842 Pressure Switch is a critical safety component designed to monitor combustion blower performance and ensure proper venting pressure within high-efficiency commercial water heaters and boilers. This OEM air pressure switch acts as a fail-safe, preventing ignition if the inducer motor fails to establish the correct differential pressure. As the direct 100166151 replacement part, this switch is engineered for high-cycle reliability and precision calibration to meet factory-specified inch water column (WC) trip points. Utilizing a Lochinvar pressure switch ensures seamless integration with the existing control board, maintaining the appliance's UL certification and operational sequence. For technicians performing HVAC troubleshooting on Lochinvar Armor or Knight series and A.O. Smith Cyclone models, replacing a faulty pressure switch with this genuine 100276842 assembly is essential for resolving ignition failure codes and ensuring safe flue gas evacuation.
Key Benefits for the Contractor- Direct Replacement: Precisely replaces legacy part number 100166151 without requiring bracket modification.
- System Integrity: Calibrated to exact OEM tolerances for accurate draft sensing and safety circuit continuity.
- Durability: Constructed with high-grade diaphragms to resist fatigue from frequent cycling in commercial applications.
- Wide Compatibility: Optimized for use in various high-efficiency water heaters and boiler models.
Is the 100276842 compatible with older 100166151 installations?
Yes, this is the official updated part number and serves as a direct drop-in replacement for the 100166151 air pressure switch.
What causes this switch to fail?
Failure is often caused by moisture in the sensing tubes, a ruptured internal diaphragm, or carbon buildup in the venting system affecting the differential pressure.
Can I use a universal pressure switch instead?
It is not recommended. This OEM 100276842 switch features a specific fixed set point required for the safety sequence of Lochinvar and A.O. Smith units; universal switches may not trip at the correct pressure.
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 100276842 Pressure Switch
The Lochinvar & A.O. Smith 100276842 Pressure Switch is a critical safety component designed to monitor combustion blower performance and ensure proper venting pressure within high-efficiency commercial water heaters and boilers. This OEM air pressure switch acts as a fail-safe, preventing ignition if the inducer motor fails to establish the correct differential pressure. As the direct 100166151 replacement part, this switch is engineered for high-cycle reliability and precision calibration to meet factory-specified inch water column (WC) trip points. Utilizing a Lochinvar pressure switch ensures seamless integration with the existing control board, maintaining the appliance's UL certification and operational sequence. For technicians performing HVAC troubleshooting on Lochinvar Armor or Knight series and A.O. Smith Cyclone models, replacing a faulty pressure switch with this genuine 100276842 assembly is essential for resolving ignition failure codes and ensuring safe flue gas evacuation.
Key Benefits for the Contractor- Direct Replacement: Precisely replaces legacy part number 100166151 without requiring bracket modification.
- System Integrity: Calibrated to exact OEM tolerances for accurate draft sensing and safety circuit continuity.
- Durability: Constructed with high-grade diaphragms to resist fatigue from frequent cycling in commercial applications.
- Wide Compatibility: Optimized for use in various high-efficiency water heaters and boiler models.
Is the 100276842 compatible with older 100166151 installations?
Yes, this is the official updated part number and serves as a direct drop-in replacement for the 100166151 air pressure switch.
What causes this switch to fail?
Failure is often caused by moisture in the sensing tubes, a ruptured internal diaphragm, or carbon buildup in the venting system affecting the differential pressure.
Can I use a universal pressure switch instead?
It is not recommended. This OEM 100276842 switch features a specific fixed set point required for the safety sequence of Lochinvar and A.O. Smith units; universal switches may not trip at the correct pressure.
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
The Lochinvar & A.O. Smith 100276842 Pressure Switch is a critical safety component designed to monitor combustion blower performance and ensure proper venting pressure within high-efficiency commercial water heaters and boilers. This OEM air pressure switch acts as a fail-safe, preventing ignition if the inducer motor fails to establish the correct differential pressure. As the direct 100166151 replacement part, this switch is engineered for high-cycle reliability and precision calibration to meet factory-specified inch water column (WC) trip points. Utilizing a Lochinvar pressure switch ensures seamless integration with the existing control board, maintaining the appliance's UL certification and operational sequence. For technicians performing HVAC troubleshooting on Lochinvar Armor or Knight series and A.O. Smith Cyclone models, replacing a faulty pressure switch with this genuine 100276842 assembly is essential for resolving ignition failure codes and ensuring safe flue gas evacuation.
Key Benefits for the Contractor- Direct Replacement: Precisely replaces legacy part number 100166151 without requiring bracket modification.
- System Integrity: Calibrated to exact OEM tolerances for accurate draft sensing and safety circuit continuity.
- Durability: Constructed with high-grade diaphragms to resist fatigue from frequent cycling in commercial applications.
- Wide Compatibility: Optimized for use in various high-efficiency water heaters and boiler models.
Is the 100276842 compatible with older 100166151 installations?
Yes, this is the official updated part number and serves as a direct drop-in replacement for the 100166151 air pressure switch.
What causes this switch to fail?
Failure is often caused by moisture in the sensing tubes, a ruptured internal diaphragm, or carbon buildup in the venting system affecting the differential pressure.
Can I use a universal pressure switch instead?
It is not recommended. This OEM 100276842 switch features a specific fixed set point required for the safety sequence of Lochinvar and A.O. Smith units; universal switches may not trip at the correct pressure.
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.
