Lochinvar & A.O. Smith 100217965 Pressure Switch
The Lochinvar & A.O. Smith 100217965 Pressure Switch is a critical safety component designed for precise monitoring of the combustion air sequence in high-efficiency water heaters and boilers. This 2.3" WC blocked inlet pressure switch functions as a normally open contact that closes when the inducer fan generates the required negative pressure, ensuring the venting system is clear of obstructions before ignition. Engineered for compatibility with specific Lochinvar Knight and A.O. Smith Cyclone models, this HVAC differential pressure switch prevents hazardous operation during flue or intake blockages. As a direct OEM replacement pressure switch, the 100217965 (formerly part number 100161476) maintains the factory-calibrated setpoint essential for commercial water heater repair and equipment longevity. Reliability in the field is bolstered by its durable diaphragm construction, which resists fatigue even under high-cycle demand in demanding mechanical rooms.
Key Benefits for Technicians- Ensures safe boiler operation by detecting intake and exhaust line blockages immediately.
- Factory-calibrated 2.3" WC setpoint eliminates field adjustment errors and reduces callback rates.
- Direct OEM fitment for A.O. Smith, Lochinvar, and State Water Heater units ensures electrical and mounting compatibility.
- Rugged construction designed to withstand the thermal stresses of high-output condensing water heaters.
What are the symptoms of a failing blocked inlet pressure switch?
Failure typically results in an ignition lockout or a "Pressure Switch Stuck Open" error code. Technicians should use a manometer to verify if the 2.3" WC pressure is being reached before condemning the switch.
Can I substitute this switch with a universal adjustable model?
For Lochinvar and A.O. Smith equipment, it is critical to use the specific OEM 100217965 to match the original safety engineering and venting specifications of the appliance.
How do I test the 100217965 for continuity?
With the inducer running and the tube connected, the switch should show near-zero resistance across the terminals. If the vacuum pressure exceeds 2.3" WC and the circuit remains open, the internal diaphragm or contacts have failed.
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 100217965 Pressure Switch
The Lochinvar & A.O. Smith 100217965 Pressure Switch is a critical safety component designed for precise monitoring of the combustion air sequence in high-efficiency water heaters and boilers. This 2.3" WC blocked inlet pressure switch functions as a normally open contact that closes when the inducer fan generates the required negative pressure, ensuring the venting system is clear of obstructions before ignition. Engineered for compatibility with specific Lochinvar Knight and A.O. Smith Cyclone models, this HVAC differential pressure switch prevents hazardous operation during flue or intake blockages. As a direct OEM replacement pressure switch, the 100217965 (formerly part number 100161476) maintains the factory-calibrated setpoint essential for commercial water heater repair and equipment longevity. Reliability in the field is bolstered by its durable diaphragm construction, which resists fatigue even under high-cycle demand in demanding mechanical rooms.
Key Benefits for Technicians- Ensures safe boiler operation by detecting intake and exhaust line blockages immediately.
- Factory-calibrated 2.3" WC setpoint eliminates field adjustment errors and reduces callback rates.
- Direct OEM fitment for A.O. Smith, Lochinvar, and State Water Heater units ensures electrical and mounting compatibility.
- Rugged construction designed to withstand the thermal stresses of high-output condensing water heaters.
What are the symptoms of a failing blocked inlet pressure switch?
Failure typically results in an ignition lockout or a "Pressure Switch Stuck Open" error code. Technicians should use a manometer to verify if the 2.3" WC pressure is being reached before condemning the switch.
Can I substitute this switch with a universal adjustable model?
For Lochinvar and A.O. Smith equipment, it is critical to use the specific OEM 100217965 to match the original safety engineering and venting specifications of the appliance.
How do I test the 100217965 for continuity?
With the inducer running and the tube connected, the switch should show near-zero resistance across the terminals. If the vacuum pressure exceeds 2.3" WC and the circuit remains open, the internal diaphragm or contacts have failed.
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 100217965 Pressure Switch is a critical safety component designed for precise monitoring of the combustion air sequence in high-efficiency water heaters and boilers. This 2.3" WC blocked inlet pressure switch functions as a normally open contact that closes when the inducer fan generates the required negative pressure, ensuring the venting system is clear of obstructions before ignition. Engineered for compatibility with specific Lochinvar Knight and A.O. Smith Cyclone models, this HVAC differential pressure switch prevents hazardous operation during flue or intake blockages. As a direct OEM replacement pressure switch, the 100217965 (formerly part number 100161476) maintains the factory-calibrated setpoint essential for commercial water heater repair and equipment longevity. Reliability in the field is bolstered by its durable diaphragm construction, which resists fatigue even under high-cycle demand in demanding mechanical rooms.
Key Benefits for Technicians- Ensures safe boiler operation by detecting intake and exhaust line blockages immediately.
- Factory-calibrated 2.3" WC setpoint eliminates field adjustment errors and reduces callback rates.
- Direct OEM fitment for A.O. Smith, Lochinvar, and State Water Heater units ensures electrical and mounting compatibility.
- Rugged construction designed to withstand the thermal stresses of high-output condensing water heaters.
What are the symptoms of a failing blocked inlet pressure switch?
Failure typically results in an ignition lockout or a "Pressure Switch Stuck Open" error code. Technicians should use a manometer to verify if the 2.3" WC pressure is being reached before condemning the switch.
Can I substitute this switch with a universal adjustable model?
For Lochinvar and A.O. Smith equipment, it is critical to use the specific OEM 100217965 to match the original safety engineering and venting specifications of the appliance.
How do I test the 100217965 for continuity?
With the inducer running and the tube connected, the switch should show near-zero resistance across the terminals. If the vacuum pressure exceeds 2.3" WC and the circuit remains open, the internal diaphragm or contacts have failed.
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.
