Error Code HS

Humidity Sensor failure

Also displayed as: HS

How to Fix

1. 1

   Turn off the dryer and unplug.

2. 2

   Enter diagnostic mode and press START/PAUSE once to start tumbling without heat.

3. 3

   With door closed, open door — dryer stops; reach into drum and place fingers across moisture sensor bars while pressing door switch button.

4. 4

   Observe numerical display: value should be between 30–255 and should decrease as moisture from skin is sensed.

5. 5

   If values do not change or are abnormal, proceed to mechanical test.

6. 6

   Disconnect NA6 connector from main PCB. Measure resistance between NA6 GN pin and chassis ground — should be less than 1 Ω.

7. 7

   If not less than 1 Ω, check all wiring harness connections and ground screws.

8. 8

   If ground is correct, put a jumper between NA6 OR pin and NA6 BL pin to create a test circuit.

9. 9

   Measure resistance between the two moisture sensor bars inside the lint filter housing — should be less than 1 Ω.

10. 10

    If not less than 1 Ω, check all connections and wires between NA6 terminal at main PCB and sensor bars. Resistance of all wires should be less than 1 Ω.

11. 11

    Check all sensor harness connectors for corrosion, loose/bent pins, and broken wires.

12. 12

    If wiring and sensor bars are good, replace the main PCB.

This Error Applies To

LG DLEX4200B Series Dryers