Lochinvar & A.O. Smith 100111033 Pressure Switch

The Lochinvar & A.O. Smith 100111033 Low Gas Pressure Switch is a critical safety component designed to monitor incoming line pressure and ensure the burner assembly operates within specific tolerances. This OEM replacement part serves as the direct updated version for the obsolete 9006256015, featuring improved set-point reliability and vibration resistance. Engineered for high-efficiency commercial boilers and water heaters, the 100111033 functions as a normally open switch that closes when gas pressure reaches the required threshold, completing the ignition safety string. For service technicians, this switch facilitates precise HVAC troubleshooting by preventing the combustion cycle if localized gas supply drops below safe operating levels. Its durable housing and gold-plated contacts provide low-resistance electrical signals, ensuring compatibility with advanced integrated control boards. Use this HVAC pressure switch to maintain compliance with manufacturer safety standards and prevent nuisance lockouts in high-demand hydronic heating systems.

Key Benefits:

• Direct OEM Compatibility: Engineered as the specific replacement for 9006256015, ensuring fitment in Lochinvar Power-Fin and Knight XL models.
• Critical Safety Logic: Prevents lean burn conditions by monitoring minimal gas pressure requirements before allowing the pilot or main burner to energize.
• Optimized Set-Points: Factory-calibrated for precise actuation, reducing callbacks related to fluctuating supply pressure or gas valve irregularities.
• Durable Construction: Built to withstand commercial mechanical room environments and repetitive cycling without losing calibration accuracy.

Common Questions:

Will the 100111033 fit my older A.O. Smith system?
Yes, if your service manual calls for part 9006256015, this current 100111033 is the authorized engineering update and carries the same electrical and pressure ratings.

How do I verify if this pressure switch is faulty?
Check for continuity across the terminals when the system is under proper gas pressure. If the boiler pressure switch remains open despite adequate line pressure, the internal diaphragm or contact set has likely failed.

Is this switch compatible with both Natural Gas and Propane?
This component is designed to monitor gas line pressure for safety sequences in both fuel types, provided the system is configured to the manufacturer's specific water heater pressure switch settings.

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.