Lochinvar & A.O. Smith 100208382 Pressure Switch

The Lochinvar & A.O. Smith 100208382 Pressure Switch is a critical safety and operational component designed for high-efficiency hydronic systems and commercial water heaters. This SPST (Single Pole Single Throw) pressure switch is factory-calibrated to a 6.20" WC (Water Column) set point, ensuring precise monitoring of combustion air or flue gas pressure. As a veteran technician knows, maintaining the correct pressure threshold is vital for the safe sequencing of the inducer fan and burner assembly. This OEM part is a direct replacement for legacy part numbers PRS20019 and PRS20019K, as well as 100166113, offering seamless HVACR compatibility with Lochinvar Knight XL, Aquas OXN models 601-801, and various A.O. Smith Cyclone commercial units.

When diagnosing pressure switch lockout or boiler ignition failure, installing an OEM Lochinvar 100208382 ensures the system returns to its original engineering specifications. Its robust diaphragm and contact design are engineered to withstand the demanding cycles of commercial pool packages and condensing boilers. Whether you are performing a pressure switch replacement during a routine service call or troubleshooting a specific 6.20" WC SPST requirement, this genuine Lochinvar boiler part provides the reliability needed to prevent nuisance shutdowns and ensure water heater performance.

Key Benefits:

• Broad Compatibility: Serves as a direct replacement for PRS20019, PRS20019K, and 100166113 across multiple Lochinvar and A.O. Smith platforms.
• Precision Calibration: Fixed at 6.20" WC to ensure the system operates within exact safety tolerances.
• OEM Reliability: Genuine Lochinvar & A.O. Smith part ensures proper SPST switch logic and electrical connectivity.
• System Safety: Essential for preventing combustion issues by verifying proper draft before the ignition sequence begins.

Common Questions:

What are the signs that my Lochinvar 100208382 pressure switch is failing?
Common indicators include the inducer motor running without the burner igniting, or the control board displaying a pressure switch stuck open or stuck closed error code. In consistent Knight XL or Cyclone models, this often points to a diaphragm failure or clogged pressure tubing.

Can I use this to replace a switch with a different Water Column rating?
Professional best practice dictates that you must match the 6.20" WC rating exactly. Using a switch with a different set point can lead to hazardous combustion conditions or frequent system lockouts.

Is 100208382 compatible with Outdoor Knight XL models?
Yes, this part is the designated pressure switch for Outdoor Knight XL and Aquas OXN models ranging from 601 to 801, specifically designed for these high-output commercial applications.

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.