78543 (AST1SER) LG Refrigerator - Instructions

Turn off power, remove upper and lower drawers (may need to open upper refrigerator doors to remove large freezer bin,) remove drawer supports (upper and lower), remove rear freezer panel (trick is to loosen 4 screws on fan bumpout to get the panel to come free from the freezer side wall), test thermistor with multimeter (should have continuity or near zero resistance across 2 orange fuse wires) before cutting zip ties, cut zip ties holding Thermistor in place, remove old Thermistor, install new Thermistor, install new zip ties, replace rear freezer panel, install upper and lower drawer supports, install drawers, turn on power, should be fixed if error code doesn't return after 6 hours.

Shut off water supply. Disconnect main supply line. Remove rear lower panel on back of refrigerator. Remove all tubing clamps on back. Disconnect leaking tubing from water supply valve. Remove water filter and unscrew/remove water filter housing. Replace tubing - connect to water filter housing then to water supply valve. Reconnect filter housing and filter. Reinstall lower panel, then main water supply line, then all tubing clamps. Turn water back on and check for leaks after discarding several glasses of water to fill filter. Job complete!

As per utube

1) Remove three drawers and items sitting on glass shelf.
2) Remove glass shelf
3) Remove entire crisper plastic unit from refrig.
4) Unscrew 6 screws holding uprights with a philips head screwdriver.
5) Remove top frame and replace with new frame.
6) Replace 6 screws and tighten them.
7) Replace entire frame in refrig and replace 3 drawers and glass shelf.
8) Done

Remove 2 screws and then disconnect wires to the bulb sockets. Reconnect the wires Reinstalled lamp case , tab end first then replaced the 2 screws and the Lens cover. In addition, I changed out the incandescent bulbs to a much cooler LED bulb.

The heavy work is moving the fridge, then take off the lower plans. Use a bowel or cup for screws and the water line connector spacers so you don't loos them.
undo connections holding water line, including the bottom brakes for the solenoid. Reuse the spring around the lower waterline to prevent external wear on the line.

NOTE: remove the waterline connector spacers and save!
NOTE: you must compress (not pull) the connect to then pull the waterline out of the connectors.
NOTE: You must also remove the water filter and housing inside the fridge but this is easy.
MOTE: Test the line for leaks by turning on the water and then using the door water. The filter will need to refill so it may take a minute before water comes up. This line only have pressure when the door water is used or the ice maker needs to make ice.


After replacing the line, test the line for leaks by using the door water so the solenoid fills the lines

An easy way to get a refrigerator out from the wall is to use a tow strap or 1/2 to 3/4 in. rope. Throw a loop behind refer while keeping both ends in your hands. Let it settle down to the lower half of unit and pull using both hands. Comes right out.
Remove lower panel. Unscrew water valve from cabinet. Remove all tube holders Lay some rags down to catch a little water drainage.
Turn off water supply valve at wall. Unplug Power. Remove filter and filter holder. (one screw).
remove tube from valve by removing plastic C clip. Push plastic ring towards the valve and pull out tube at same time.
With the tube free, remove filter, then mount screw to remove the inside filter holder. When it is out, pull the tube doing the same process as the lower end. Pull tube out and replace with new one putting everything back in reverse order.
Before placing tube holders back on, turn on water to check for leaks.
After turning water back on and plugging in power, push refer back into place.
While I was there, I also replaced the hose from the wall to the refer.

This is bottom drawer type frige. Icemaker is inside (not in the door) and hard to reach. I first tested the solenoids by disconnecting them and using a test cord, energized them independent of the frige wiring. They worked ok. Note: this frige has (2) solenoids going to the icemaker. And it has (3) solenoids serving the water dispenser. The icemaker solenoids are wired in parallel. I removed the icemaker by removing (1) screw from the bottom and loosening (2) on the top. Then removed icemaker as a complete unit disconnecting the wire connector at the same time. On the bench I tested the icemaker to verify it was defective. The wire harness has a 10 amp fuse in the black wire (hot wire). `The fuse was blown. This was sufficient to indicate the icemaker is shot. I did however, do some other tests. Cold resistance of the mold heater was 72 ohms. The timer motor was 4000 ohms. These measurements should be ok. I then activated the icemaker with a test cord, bypassing the blown fuse. The unit cycled one complete rotation then stopped. The mold heater worked. I tested the amp draw on the mold heater and it was only .1 amps. I should be a about .8 amps. I then cycled it again and then the timer motor began to sizzle and smell. Then it smoked and stopped mid-rotation. I then purchased a new icemaker. I believe the mold heater was going bad over time as this unit made ice but very slowly. This put extra strain on the motor as the mold was not releasing quickly. This damaged the motor causing it to fail.

Replaced old hose and installed the new one. Was very simple with the instructions in your email..... step by step, could not of been any similar.... you guys rock

After noting frost in freezer Right rail started to jam. Noted freezer door was closing crooked. Rail replacement resolved issue. It had been frosting up for some time so Rail must have been broken for a while. Check door seals they were not closing flush.

Removed old rails and tapped new rails in place. The big problem was finding how to fix the drawer. After searching many online websites, It was my good fortune to find Partselect and a one of their service representatives who
knew how to fix my drawer
and they had the part.

I found a crack in the pex line from the valve up the back of the refrigerator to the water filter. I could not find the correct 5/16" size line locally to replace it. A guy in plumbing at Home Depot said he always repaired them by cutting out the crack and finding a piece of clear vinyl line that would fit tightly over the cracked pex to splice in a fix with hose clamps. I did that and it was a really bad idea. The line was obviously fatigued and failing because it just cracked further up and leaked again. I then looked up and ordered the correct line (actually both the supply and return since they were available). Installing the new lines was a breeze. The pex connectors are simple to disconnect and reconnect. Wish I had done that to start with. I looked for a youtube video for the proper replacement steps but all I found was a video of a guy who cut out a crack and stuck a pex connector in to replace the cracked section. By doing that he pulled slack from the valve end of the line which didn't exist and cracked the line again. I don't know why anyone would mess with patching one of these lines. The correct parts are available, cut to the right length, and removing and replacing them at the valve and the filter is dead simple.

Ordered part from part select. Received part with out instructions. It took only one screwdriver for 1 screw removal and then removing cover to replace switch. Pretty simple

Took out tray , removed 2 screws, removed old rail and installed new one.

removed old handle

Installed new handle with hex wrench used to tighten up