How to Troubleshoot & Replace Lg AP4438546 / 6631EL3003B Dryer Moisture Sensor Wire Harness

I spoke with the experts at parts pro and they suspected the main power board. I ordered the main power board along with the control panel. Since I was taking everything apart I decided to replace other components as well- thermostats, thermistor , sensor wire. When I was all done the old LG was back to working like new. Oh while I was at it I cleaned and vacuumed out the complete machine. Great factory parts, videos p, service and videos, the price of all the parts was less than a repair technician and easy to do. 

I removed the top and front and found a huge ball of lint and other things that slipped between the drum and bulkhead. With the lint catching fire by the heating element it burnt the wire to the moisture sensor. Found the drum seal to be missing. Bought drum seal, adhesive, and moisture sensor. Greased all drum wheels, removed and replaced drum seal, and replaced moisture sensor wire. Put dryer back together and it work as good as new. The videos you have posted helped tremendously when the drum seal. 

Watched the helpful videos that were displayed with each part. Took less time than they gap predicted 

Watched a YouTube video . Followed video. Works great with new parts. 

Thermistor, thermostat, moisture sensors replacement 

YouTube video from appliance part pros helped me buy the exact parts needed and complete the repair quickly. I can't image how much I saved by not having to call a repair person. Thank you! 

I replaced all four drum support roller assemblies, and the belt. I also cleaned more lint than I realized could accumulate in a dryer!! After that, the dryer then turned but would not heat. I found that weird because it was not part of my original issue. I purchased the moisture sensor and it's holder as well as a new wire harness because I thought I may have damaged it in the assembly or my cleaning. I also purchased the thermistor assembly because there were forums that said this might also be the cause and it was cheap. I replaced those parts and there was still no heat. After re-reading in forums I saw that there was the chance that the safety thermostat was tripped. I located that part on the dryer and sure enough, it was tripped. I am guessing when the drum stopped turning due to the roller assemblies, it got hot and tripped the safety switch. It runs like a dream now!! 

New motor, heater, thermostat and sensor. Working good now. Easy repair, if you take your time and follow the video