79679272012 LG Dryer - Instructions

We replaced the drum belt and the rollers. Everything was very easy and straightforward but took a fair bit of time due to the extensive disassembly required. We followed the video available on the website for the belt replacement, which was very clear and accurate. Unfortunately, the rollers we received used a different attachment method than the OEM rollers which are depicted in the video provided. Instead of attaching from the front with a triangular plastic lock washer, they had to be attached via a nut on the back side of the roller. This required some improvisation and was a little more involved. For the rear rollers, we actually had to remove another panel to access the nuts, which was not described in the video. Nevertheless, we managed to get everything replaced and the dryer is working like it was the day we bought it.

Followed the repair video provided in the order confirmation email. Was easy.

First of all, I watched the videos provided by this site. I am not a professional appliance technician.

My dryer is mounted on top of my LG washer.
I ordered appliance moving leg pads. And I ordered a small but effective jack to raise up both units to insert pads under the feet.
Now I could slide the stacking unit away from the wall.

I set out my drill, Phillips head bits, pliers, a socket set, a small crescent wrench, and my phone with videos.
I also used a short ladder to get up to the top of the dryer.
Having the dryer mounted on top of the washer was actually perfect for working from the front of the dryer cabinet.
Watch out for very sharp edges. You can wear gloves. But I found gloves to be an impediment to feeling the parts.

My replacement parts:
1) four drum support rollers with shafts. I replaced the roller and shafts together. The new rollers would not fit on the old shafts.
2) drive belt
3) two moisture sensors. Located on the lint filter housing.

Here is how it went:

I spent six hours in one day to disassemble, vacuum, reinstall parts, and reassemble. My dryer is a steam unit, so the control panel electronics are on the right side rather than on the front panel as in the video I watched. In order to replace the drum rollers and their mounting shafts I just needed to pull the drum rear mounting bracket forward just enough to get the small crescent wrench on the nut behind the roller and my socket wrench on the top of the roller shaft. And off they came.

I tested the dryer with a load of damp bath towels. The motor ran but the drum did not turn. It was then that I realized that I had the drum drive belt on with the wrong side facing the drum. One side of the drive belt is smooth. And the opposite side has parallel grooves. The parallel grooves side needs to contact both the drum as well as the motor pulley. The grooves face away from the tensioner pulley.

So, the next day I spent 90 minutes partially disassembling the dryer enough to get to the drum belt once again. I pulled out the drum again to wrap the drive belt over it in the correct orientation. It is not easy to see the motor drive pulley or the belt tensioner pulley. I did it by feel and watching the videos again. I hooked up the drive belt mostly by feel this time. And I got it done. Now the drier runs very quietly. By the way. No need to remove anything on the back of the dryer.

Pretty satisfying overall.

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.

One of the roller assembly froze up & had a flat spot on it. There for causing the drum not to rotate. Pulled it out replaced the roller & up & running.

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

Watched a You Tube video

I assumed this was a belt problem. Ordered the belt and followed the excellent screw by screw instructional YouTube provided by PartSelect. In fact, I probably would not have attempted the repair, until I watched the video and was reassured that I could do it. When I got the front panel off, the problem was obvious. There was a dishrag stuck in the blower. Didn't need the belt, but the video was sure worth the price of the part (~$17). Mr. Appliance charges $109 to DIAGNOSE the problem! This was way easier than dealing with them, especially during a pandemic near the holidays.

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.

There’s all sorts of videos on it I watched. It was actually very simple

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

This was all pretty straightforward with the helpful video hosted on this site. The only issues I ran into was I had a seized screw that stripped and I had to drill it out and replace it. Also, I had to disassemble the front and rear a little bit further than what is shown in order to install the new roller axles. I was pleasantly surprised that I did not have to worry about the triangular retainers, because the replacement rollers/axles use an improved metal retaining pin. Overall, I'm very happy and the dryer is nearly silent now. It was a bit of a challenge but I took my time and gave myself breaks throughout the morning rather than banging my head against the wall.

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

An appliance repairman determined the problem which was that it needed new pulleys and thankfully PartSelect carried them. He installed them in an hour and my dryer runs fine now.