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Re: Moisture sensor not working
No parts needed for this repair! Get a warm damp cloth and reach inside the rear of the dryer and clean the **** off the 2 strips of metal in the back called sensors. Next get the rear of the timer panel off and yank out the small computer board next to the timer. This is the moisture sensing board. Get some alcohol and clean the copper contacts. Shove the board back in and retry.
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The moisture sensor strips can become contaminated by residue from dryer sheets (and other things). It would be worth a try to clean the sensor strips with glass cleaner (ONLY!) before replacing the sensor.
You can go to www.repairclinic.com and enter the model number of your dryer to see an illustrated list of common replacement parts. You also may be able to view a video showing how to make repairs.
ELECTRIC Dryer no heat or little heat, or shuts down to fast:
Check your venting and lint basket. Check blower for lint build up and blower wheel obstruction., test by trying to turn the wheel manually by hand (should be easy) May have to remove cabinet or front/back plate to get to it)
Next check the heating element itself with a meter for continuity OHMS CLOSED CIRCUIT. If not its defective or has a short if its grounding out? Which in turns causes blown fuses or thermostats or overheating.
Check dryer Terminal block prongs both outside prongs should give combined 220, and 110 each if u check 1 outside & 1 center (ground) prong. Also check house electrical outlet for full voltage. 220 because if u only get half or 110 volts you will be able to run the machine which uses only 110 to run motor but not the heater which uses a full 220,
Check the thermal cut off, the cycling and the hi limit thermostats.
For continuity or OHMS. If no ohms or resistance they need replacement.
Lastly check your moister sensor. ( located inside the dryer door usually) Especially if machine seems to shut down early and clothes are still wet.
Test with a meter at room temperature and it should show continuity.
A failed moisture sensor will affect the dryer run time in the automatic moisture sensing cycle but it will not affect the heating of the dryer or the timed cycle. Which are reflected by the thermostats.
This sounds like it is on a permanent press cycle. When it says end the clothes are dry.
Having said that....... If it is NEW this is a warranty repair. The moisture sensor is most likely the culprit causing the end of cycle trigger pre-maturely. Check around the moisture sensor for anything like bobby pins, straight pins, toothpicks (i.e anything foreign. Check the 2 strips and along the edges thoroughly for any foreigen matter.
If it is 2nd hand the moisture sensor is probably bad and passing false dry signals to the control. Again check for foreign debris before even thinking about replacing parts.
If you find nothing then before you buy parts there is a test for the moisture sensor. Just respond here and we can go from there.
Dryers with electronic control and auto dry cycle indeed use moisture sensors for the auto drying to work. The problem is absolutely associated with the failure of the moisture sensors, especially when the timed dry cycle works fine. Either the connection of the sensors to the electronic control is loose or the sensors are covered with thin film that prevents it to sense the proper moisture content of the clothes.
Clean the moisture sensor bars thoroughly and make sure its connections are snug fit. Reseat the connections several times to clean off dirt and corrosion build up in the connectors and terminals. The last thing to look into is the electronic control if all resort fail to address the issue, that is, clean sensor bars and good terminal connections.
Indicate the exact model number of the dryer should you need further or more specific troubleshooting and repair advice.
The moisture sensor is shot and needs replacing
It works till it sees dry air going past it (As set by the maker)if it thinks the air is still moist it will keep on trying to dry it.
Call out a repairman or buy a sensor and fit it yourself
Once I discovered that the problem was not the dryer, I went into my crawl space and discovered the plastic duct was clogged with lint. Apparently the duct was not changed since the house was built over five years ago! The 4" duct was also duct taped to a 3" connector. Additionally the line ran into the crawl space at a 90 degree angle in a space that was only 2" wide! My husband adjusted the way the line ran into the crawl space and replaced it with a rigid aluminum duct. The auto sense works on my dryer and it takes only 30 min. to dry a load of laundry instead of 1-1/2 hours!
This may be a problem with your moisture sensor or the control that read the sensor. If it is under warranty have Samsung fix it for free. Make sure the cycle settings are correct before tinkering. First make sure the electronics are not too dusty. You could blow them off or vacuum them. Dirt particles can conduct electricity and make it read wrong. Next check the electrical connection for the moisture sensor. See if its location is in the manual. If it doesn't work after some tinkering asked the service for the dryer about possibly replacing the sensor but first try hard to get it to work.