Carrier 50HJ442730 Sensor

When you are troubleshooting a Carrier rooftop unit (RTU) or furnace showing a 6-flash code, the problem often traces back to a failed Carrier 50HJ442730 Hall Effect Sensor. This critical component serves as the electronic equivalent of a pressure switch, specifically designed to monitor the induced draft motor by detecting the magnetic field of the spinning impeller. Without a precise signal from this OEM replacement sensor, the control board cannot verify combustion blower operation, leading to immediate system lockout and no heat calls. This sensor is the direct, drop-in replacement for legacy part numbers 50HJ401-484 and 50HJ401484, ensuring you don't have to replace the entire inducer assembly when only the sensing element has failed.

This 3-wire sensor features a 60-inch lead with a factory-terminated plug for a secure, plug-and-play connection to the HVAC control board. Engineered to operate within a wide professional temperature range, it maintains stable 1.65V to 5.5V signal conversion even in high-heat environments. For the veteran tech, this magnetic field sensor provides a reliable way to restore safety circuit integrity in Carrier, Bryant, and Payne gas-fired equipment. Field testing typically requires checking for 6-10V DC at the harness to confirm the board is sending power before verifying the fluctuating signal as the motor rotates.

• Direct OEM Compatibility: Replaces 50HJ401484 and 50HJ401-484 without wiring modifications.
• Cost-Effective Recovery: Eliminates the need for full combustion motor replacement in systems where the motor is mechanically sound.
• High-Temperature Durability: Rated for extreme operational environments typical of industrial HVAC applications.
• Standardized 3-Wire Interface: Features a 60-inch lead for versatile routing across various cabinet sizes.
• Precision Diagnostics: Facilitates accurate draft inducer motor proving for Carrier RTU error code resolution.

How do I test if the 50HJ442730 sensor is faulty?
With power on and the inducer spinning, check the DC voltage between the signal and ground wires. You should see a pulsing or fluctuating voltage. If the voltage remains static or there is no output despite proper input power from the board, the sensor is likely defective.

Can this sensor replace a traditional mechanical pressure switch?
No. This Hall Effect Sensor is designed specifically for systems with control boards programmed to read magnetic pulses. It must only be used as a direct replacement sensor for the compatible Carrier models specified.

Does this part include the mounting screws?
This is the sensor and lead assembly. It is recommended to retain the original mounting hardware from the 50HJ401484 unit being replaced for installation onto the motor housing.

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.