Dryer Moisture Sensor Testing

Dryer taking too long to dry? The moisture sensor could be faulty. This video will show you how to test a sensor to see if it is causing your problem.

Other commonly replaced parts:

Thermal fuse
Gas solenoid valve
Dryer igniter
High limit thermostat
Cycling thermostat
Main control board
Timer

Click here to purchase the multimeter used in this part testing video:

How to disassemble your dryer:

For more DIY videos including part replacement and help finding your model visit the repair help section of our website:

All of the information provided in this part testing video is applicable to the following brands: Amana, Frigidaire, GE, Kenmore, LG, Maytag, Roper, Samsung and Whirlpool.

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[grinder]

Thank you for this DIY video. We have a 12 year old Samsung washer and dryer that have never given us any issues before today. I suspected the sensor was the issue but had not idea where to locate it or how to test it. When I stuck my head in the dryer I found an old dryer sheet had been caught behind the lint trap housing and was completely covering the sensors. I removed the sheet and ran the diagnostic test as described in the video. I am now confident the issue has been resolved.

[bills]

Another video said clean the sensor bars with sandpaper. Scratching the bars will allow buildup and render them useless. Use a Scotch Pad to remove dirt and soap buildup

[rlemoine]

A little bit of rubbing alcohol on the sensors and now I am getting the correct readings. Thanks!

[derpnerpwerp]

"If the meter shows ohms of resistance, you'll know the sensor has shorted".. this confused the hell out of me until I thought about what should actually be happening here.. I think whoever made this video thought a reading of 1 meant no resistance.. when actually it means the resistance is so high the multimeter can not measure it. So unless I am fundamentally misunderstanding something, the reading should be > max resistance of the multimeter (generally displayed as 1) when no wet cloth is applied

[ucdred]

Hey thanks alot, I have being trying to understand this for soooo long, NOW i GOT IT!!

[ranzhiq]

On my multimeter, the readings are correct with and without wet cloth, but when I switched the test leads, it read some unstable numbers without wet cloth, does this mean it is shortened and bad sensor bars or module? Thanks

[veronicastewart]

I have a 1996 Maytag Performa Gas dryer does my have those metal strips if where would they be ? I don’t see any .. Thanks

[JuanGomez-gbce]

Hi, I don’t have a way to test my sensors but I’m having an issue with my dryer stopping usually after 1-2 min of starting it for the first time. I then open and close the door and start it again and it runs the complete time for the cycle. Could it be my sensors?

[prabhjotwahla]

I am trying to take out the moisture heating sensor. I took out two screws from the front but I cant see any screw inside. How can I take it out. Any possibility there are snaps inside? I have GE dryer and the model number is PDVH515GF0WW. Please help me out

[lmb]

does the dryer have to be unplugged when testing?

[stevehall]

Lots of things I’d like to say to Johnwhatever … nothing good to say … carry on down the road

[johncasor]

you can also program the computer to a higher level of dry time there 4 levels you forgot to teach us that for some units... and you forgot to show us how to check board if it is getting a single from the bars with your DMM ... if your going to make a video on Moisture bar trouble shooting make a real video not some waste of time like this one man...