White-Rodgers F145-1378 Outdoor Sensor

The White-Rodgers F145-1378 is a high-precision outdoor remote sensor designed for seamless integration with Emerson Blue 12" and 6" digital thermostats, as well as the White-Rodgers 90 Series and 1F9X platforms. Engineered to provide real-time ambient data, this hardwired sensor enables advanced features like outdoor temperature display, dual-fuel heat pump logic, and auxiliary heat lockouts. It utilizes a digital signal output to eliminate the common issue of temperature variance caused by wire resistance, ensuring pinpoint accuracy even over maximum 300-foot wire runs from the subbase. The assembly includes a 12-foot probe lead, which allows the interior mounting base to remain protected within the building envelope while the probe provides a sensing range from -40°F to 140°F. For complex installs, this HVAC outdoor temperature sensor is essential for optimizing system balance points and increasing overall equipment efficiency. Professionals should utilize 18 or 20-gauge, 3-conductor shielded cable for the most reliable communication between the thermostat remote sensor and the control board.

• Enhanced Compatibility: Fully compatible with Emerson thermostat outdoor sensors and White-Rodgers 90 Series Staging models.
• Digital Signal Integrity: Prevents signal degradation and resistance-based errors over long residential or commercial cable distances.
• System Optimization: Unlocks critical heat pump lockout and auxiliary heat management settings within the 1F9X installer menu.
• Durable Construction: Rated for extreme environments ranging from -40°F to 140°F with a 90% non-condensing humidity tolerance.
• Flexible Installation: The 12-foot probe allows for strategic shaded placement to avoid solar gain bias without moving the interface base.

Is this sensor compatible with all Sensi Wi-Fi thermostats?
The F145-1378 is designed for traditional hardwired Emerson/White-Rodgers 90 Series and Blue Series controls. Many Sensi models use local weather data via Wi-Fi, so verify if your specific subbase includes the S1, S2, and S3 (or +, SA, -) terminals required for this 3-wire analog-to-digital sensor.

Can I extend the 12-foot probe lead if needed?
It is recommended not to cut or splice the factory 12-foot probe lead to maintain signal calibration. However, the 3-conductor run from the interior mounting base to the thermostat can be extended up to 300 feet using high-quality shielded thermostat wire.

What wire is recommended for the F145-1378?
For best results and to prevent electrical interference, technicians should use 18 or 20-gauge, 3-conductor shielded cable. Ensure the shield is grounded only at the thermostat subbase to prevent ground loops.

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.