Carrier 50HJ442730 Sensor A functional Reznor high limit

A functional Reznor high limit switch should show zero resistance (normally closed) at room temperature

The 30-inch lead allows for sufficient routing away from high-heat zones in larger combustion chambers

preserving the integrity of the heat exchanger by maintaining consistent internal temperatures

This manifold typically comes as a bare burner assembly

Carrier 50HJ442730 Sensor A functional Reznor high limitWhen 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