Lochinvar & A.O. Smith 100111317 Pressure Switch
The Lochinvar & A.O. Smith 100111317 Pressure Switch is a critical OEM safety component engineered for precise airflow verification in high-efficiency water heaters and boilers. This normally open air pressure switch is calibrated to a fixed set point of 0.20" WC (Water Column), ensuring the combustion blower is generating sufficient negative pressure before the ignition sequence initiates. As a genuine 100111317 replacement part, it provides the exact electrical and pneumatic specifications required to maintain the system's UL-listed performance and safety standards.
Designed for durability in demanding mechanical rooms, the A.O. Smith draft pressure switch features a high-sensitivity diaphragm and robust electrical contacts to prevent nuisance tripping and premature failure. When troubleshooting a furnace pressure switch error or ignition failure, this 0.20" WC switch is the direct residential and commercial solution for compatible Lochinvar and A.O. Smith heating systems. Always verify the set point on your existing switch matches this HVAC pressure sensor to ensure proper inducer motor coordination and burner safety.
Key Benefits:- Exact OEM Calibration: Pre-set at 0.20" WC to ensure 100% compliance with factory air-proving specifications.
- Critical Safety Interface: Prevents gas valve activation if the venting system or inducer motor fails to provide adequate draft.
- Universal Brand Compatibility: Direct fit for numerous Lochinvar boilers and A.O. Smith water heaters requiring part number 100111317.
- Industrial Grade Build: Resistant to the heat and moisture typically found in high-efficiency combustion environments.
How do I check if my 100111317 pressure switch is bad?
Using a multimeter set to continuity, check the terminals while the system is off—it should be open. Once the inducer motor reaches full speed, use a manometer to verify the draft exceeds 0.20" WC. If the suction is adequate but the switch remains open, the diaphragm or internal contacts have likely failed.
What causes a draft pressure switch to trip besides a mechanical failure?
Common system issues include restricted flue piping, a clogged condensate drain, or cracked silicone tubing. Always inspect the collector box ports for debris before assuming the 100111317 part is defective.
Can I use an adjustable pressure switch to replace the 100111317?
In professional HVAC applications, it is highly recommended to use the fixed OEM 0.20" WC switch. Using a switch with an incorrect or drifting set point can lead to unsafe combustion conditions or frequent system lockouts.
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: $91.32
-65%$91.32
$31.96Product Information
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Description
The Lochinvar & A.O. Smith 100111317 Pressure Switch is a critical OEM safety component engineered for precise airflow verification in high-efficiency water heaters and boilers. This normally open air pressure switch is calibrated to a fixed set point of 0.20" WC (Water Column), ensuring the combustion blower is generating sufficient negative pressure before the ignition sequence initiates. As a genuine 100111317 replacement part, it provides the exact electrical and pneumatic specifications required to maintain the system's UL-listed performance and safety standards.
Designed for durability in demanding mechanical rooms, the A.O. Smith draft pressure switch features a high-sensitivity diaphragm and robust electrical contacts to prevent nuisance tripping and premature failure. When troubleshooting a furnace pressure switch error or ignition failure, this 0.20" WC switch is the direct residential and commercial solution for compatible Lochinvar and A.O. Smith heating systems. Always verify the set point on your existing switch matches this HVAC pressure sensor to ensure proper inducer motor coordination and burner safety.
Key Benefits:- Exact OEM Calibration: Pre-set at 0.20" WC to ensure 100% compliance with factory air-proving specifications.
- Critical Safety Interface: Prevents gas valve activation if the venting system or inducer motor fails to provide adequate draft.
- Universal Brand Compatibility: Direct fit for numerous Lochinvar boilers and A.O. Smith water heaters requiring part number 100111317.
- Industrial Grade Build: Resistant to the heat and moisture typically found in high-efficiency combustion environments.
How do I check if my 100111317 pressure switch is bad?
Using a multimeter set to continuity, check the terminals while the system is off—it should be open. Once the inducer motor reaches full speed, use a manometer to verify the draft exceeds 0.20" WC. If the suction is adequate but the switch remains open, the diaphragm or internal contacts have likely failed.
What causes a draft pressure switch to trip besides a mechanical failure?
Common system issues include restricted flue piping, a clogged condensate drain, or cracked silicone tubing. Always inspect the collector box ports for debris before assuming the 100111317 part is defective.
Can I use an adjustable pressure switch to replace the 100111317?
In professional HVAC applications, it is highly recommended to use the fixed OEM 0.20" WC switch. Using a switch with an incorrect or drifting set point can lead to unsafe combustion conditions or frequent system lockouts.
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.
