When troubleshooting a furnace pressure switch stuck open or restricted flue code

Key Benefits: Optimized Thermal Accuracy: The remote mounted dial eliminates "false readings" caused by radiator heat pocketing

this component features a silicon nitride element known for superior thermal shock resistance compared to older silicon carbide versions

it ensures seamless integration and high-reliability performance within the liquid

This typically indicates a blockage in the venting

Lochinvar & A.O. Smith 100166220 Pressure Switch Els PW 17895 When troubleshooting a furnace pressureThe Lochinvar & A. O. Smith 100166220 is a high precision air pressure switch designed for critical safety monitoring in commercial and residential HVAC systems. Engineered to function as a Single Pole Single Throw (SPST) switch, this component features a fixed set point of . 10" WC (Water Column). It is essential for verifying proper induction draft and airflow before allowing the ignition sequence to proceed in high efficiency boilers and water