Papa Ed for Model Number wed9050xe1 1. How does the moisture sensor work? 2. How do I check it? 3. When should I replace it? 4. Should I replace anything else? Recently dryer wouldn't run at all until a roller was replaced by repairman. A week later stopped heating. On diagnostic check have continuity across heating element, the high and low thermal cut off fuses, and the third thermal fuse. Got a 10k ohm resistance across the thermistor. Believe that is acceptable. Lastly, I checked the moisture sensor and it was an open circuit (by design?). Took one out and cleaned it and miraculously dryer now heating. Not sure why it's working. Should I replace the moisture sensors anyway?
Answer Ed, You shouldn't need to replace the sensor bars, unless they are missing, they can be cleaned occasionally with an alcohol pad. To test them. place the meter leads on the sensor bar terminals, there should be an "open" circuit, place something wet or metal across the two bars, and the circuit should "close", it is an open circuit by design. Basically, wet articles falling or touching the sensor bars divert the circuit to chassis ground (a closed circuit) once the articles are dry, the circuit "opens" and allows the circuit to flow to the triac on the control board, the triac develops a "charge", when the charge builds up enough it opens and caused the board to signal the control to shut off. We don't see a need to replace anything at this point, the sensor has little or no effect on the heat cycle. You may want to recheck and clean the wiring and connections to the sensor bars and heater components. Read More... Answered by AppliancePartsPros.com | Monday, August 19, 2019