DLEX7880WE (00) LG Dryer - Instructions

The first thing I did was locate a copy of the Service Manual (not the User / Owner Manual). After looking at that and looking online I learned that there is no sensor for the Flow Sense feature itself. The Flow Sense doesn't detect a blockage. It detects excessive heat and the manufacturer has simply concluded that too much heat is most likely caused by a blocked duct and then it activates the Flow Sense safety feature: cutting off the heat source. Since I knew it was a heat problem I figured I'd get inside and check the two thermostats and the igniter. Igniter was fine, one thermostat was fine, the other one - the High Limit Thermostat - was giving inconsistent readings. I replaced it. Here's how: First I took the dryer apart. This is a little time consuming. There are a lot of parts that need to come out. I recommend that you put the screws in small baggies with a note as to where you took them out of so that you know where they go when you put it back together. You need to remove part of the back, the top and the front. I removed the electrical box because that is what is shown in the manual but I'm not convinced that I needed to. See if you can get the rest of the dryer apart without removing it but if you have to remove it it's not that big of a deal. It's a little tricky to detach the wire harnesses is all. And extra steps, of course. I did not remove the drum. Instead I just reached inside with the front off and pulled the wires off the thermostats to test them for resistance with a multimeter. It was kind of a pain and a little awkward but I did not want to mess with the drum tensioner. Once I figured out that the High Limit Thermostat was the likely culprit I removed it - which required a very short Phillips head screw driver and some patience since I could not actually see one of the screws. But all good. Just remember which wire goes on which terminal. Make a note for yourself: gray back / red front - something like that. Then I ordered the part and installed the new one and rebuilt the dryer in reverse from what I did.

Now, here's the thing: I actually did two things: aside from changing the thermostat I also thoroughly cleaned out the dryer. Somehow a lot of lint built up in there - no idea how since it all appeared to leave the dryer through the vent. but there must be some small gap somewhere. I cleaned everything including the flame detector. When I put it all back together it worked but I'm not 100% sure that the thermostat was bad. It's at least possible that all the lint and dirt was messing with the way the thermostats behaved. So what I would recommend, if you have this problem, is to clean it out first and then put it back together enough to run it and see of the heat comes on. It will take maybe 30-60 seconds for the heat to come on while the igniter lights. If not, go ahead and replace whichever thermostats or other parts you think are broken.

Called Parts Select and assisted me in proper parts needed. Drier works as new.

Took out drum. Found all parts easy to locate. Found defective part and replaced with new one.

Thank you Parts Select for your assistance.

Pull off the top and front of the dryer and reached in and replaced the part it was easy. Had to clean all the dryer out real good with from the lint

Initially replaced igniter. Didn't think it was bad though. Read other suggestions on another website. None were the correct diagnosis for my situation. And when I figured it out they did not offer correct part. The dryer thermistor temp sensor (probe sensor) is what I replaced. Found it on Parts Select. I did replace other parts also. But that's the one that ultimately was the issue.
Was not hard at all if one is even a little handy.

With a thin flat screwdriver I was able to pry out the old door switch, I replaced it with the new door switch, pushed back in dryer and so far is working since I installed a month ago.

Called LG on the phone and they gave the button presses for diagnostics, which then gave the HST code, saying the Humidity sensor was bad.
The part was described as the Humidity sensor module. Actually it's just the wire leads for the sensor which must be electronic and only accessible by disassembling the dryer. There were descriptions about cleaning the wires, perhaps because some people use dryer sheets which cause a buildup on the wires and prevent them from doing their job. I use wool balls and have no buildup on my wires and replacing them did not fix the sensor, because the module accessible inside the dryer is not the moisture sensor, but only the wire leads.

watched the video on line then did the repair, very easy to replace

Removed the old vent trap 3 screws total and replaced the new very quick and easy.

I did as I was told (by my wife). Bought the machine from Home Depot - no side vent kit - had them complete the installation today when the kit came.

Easy repair, more time spent de-linting the inside of the machine and the duct system.

Found YouTube video followed it closely and did extensive cleaning. The lint on the felt of the drum was causing a rough rotation as well.

First the delivery time was incredible, I ordered the part at 2pm on Mnday and recieved the drum Tuesday afternoon. I'm not sure how this was accomplished as I can't even mail a letter across town and receive the next day. Reoved front of dryer removed old drum and slid in new drum. only difficulty was the wiring disconnect on the control board, didn't want to come off. took 5 minutes to work loose.