Siemens Building Technology QFA3212.EWNN Sensor 322838-754 Thermal Efficiency: Molded notches increase

Thermal Efficiency: Molded notches increase airflow and dissipate heat

making it highly versatile for LBP

Technicians should check for intermittent relay failure or "GV Relay Fail" error codes on the display

ensuring the correct thermistor resistance profile for the control board

Common Questions Is this sensor compatible with non-Laars control boards

Siemens Building Technology QFA3212.EWNN Sensor 322838-754 Thermal Efficiency: Molded notches increaseThe Siemens Building Technology QFA3212. EWNN Sensor is a precision engineered room relative humidity and temperature sensor designed for demanding commercial HVACR applications. Built for high traffic environments where tamper resistance is a priority, this no display (blank front) unit provides reliable environmental monitoring without the risk of unauthorized adjustments. It utilizes a capacitive polymer sensing element for humidity and a 1k Ohm