The 632484R Nordine Flame Sensor is a critical component in gas-fired heating systems, ensuring safe operation by detecting the presence of a flame. Below are the symptoms of a faulty sensor, troubleshooting steps, and installation instructions.

Symptoms of a Faulty Nordine Flame Sensor (632484R)

1. Furnace/Boiler Fails to Ignite – The system may start but shut down quickly if the flame sensor doesn’t detect a flame.

2. Short Cycling – The burner turns on but shuts off after a few seconds.

3. No Flame Signal – The control board may lock out or display an error code (e.g., "flame failure").

4. Soot or Corrosion on Sensor – Visible buildup can impair functionality.

5. Intermittent Operation – The system works sometimes but fails at other times.

Troubleshooting the 632484R Flame Sensor

1. Power Off – Turn off the gas and electricity to the unit before inspection.

2. Visual Inspection

   • Check for cracks, corrosion, or soot on the sensor rod.

   • Ensure the sensor is properly positioned in the flame path.

3. Cleaning the Sensor

   • Use fine steel wool or emery cloth to gently clean the rod.

   • Avoid abrasive materials that could damage the sensor.

4. Testing Continuity

   • Use a multimeter to check for continuity (should read 0-5 μA when exposed to flame).

   • No continuity indicates a faulty sensor.

5. Check Wiring & Connections

   • Ensure wires are securely connected to the sensor and control board.

   • Look for damaged or frayed wires.

6. Flame Rectification Test

   • A proper flame should produce a small DC current (microamps).

   • If the reading is below 1 μA, the sensor may be faulty.

Installation Instructions for 632484R Nordine Flame Sensor

1. Turn Off Power & Gas Supply – Ensure safety before proceeding.

2. Remove Old Sensor

   • Disconnect the wire from the sensor.

   • Unscrew the sensor from the burner assembly.

3. Install New Sensor

   • Insert the new sensor into the mounting hole and secure it with the appropriate screw.

   • Ensure the sensing rod is properly aligned in the flame path.

4. Reconnect Wiring

   • Attach the wire to the new sensor (ensure a tight connection).

5. Power On & Test

   • Restore power and gas supply.

   • Start the system and verify proper flame detection.

   • Check for error codes or lockouts.

Additional Tips

• Annual Maintenance – Clean the flame sensor during routine HVAC servicing.

• Avoid Oily Residues – Do not touch the sensor rod with bare hands (oil can interfere with detection).

• Use OEM Parts – Replace with genuine Nordine parts for reliability.

If issues persist after replacement, check the control board, gas pressure, or grounding issues.