How to Troubleshoot & Replace Frigidaire AP3891780 / 134743500 Washer Motor Control Board

Googled common problems checked what I could, decided to get the motor control board,works nice 

Watched your video on how to replace the motor control board and ordered the part from you. Everything went great and the washer was back in service that day. 

Since this machine is 15 years old, I replaced the main control board, the motor control board and the motor. Diagnostics pointed to an issue with either the motor or the control board. The machine itself is still in excellent condition so I decided to repair it after seeing new machine prices. I've been doing this kind of repair work for over 30 years. 

I was told by two repair techs that our washer was too old and parts were not available. I opted to fix myself. Finding the model number was the hardest part. The tags wkj model number had worn off long ago. I took a gamble on a model I found a pic of online that looked like ours. It paid off. The motor and controller fit and the video walked me through the installation. Took about 1/2 hour from start to finish. The washer runs like new. Thank you! 

The "Washer Tech Data Sheet" is inside the cabinet; once you remove the top the sheet is taped to the drum housing. The error code indicated a communication problem and that the control board needed to be replaced. I first made sure the water supply and the solenoids were functioning; they checked out okay. Purchased the main control board (great video by Appliance Parts Pros and advice by previous purchasers) but the problem continued with the same error. The "Data Sheet" shows how to do a diagnostic test where the program knob tests the function of the various part of the washer. Any function that required the motor to spin the drum failed. Did the motor tests found in the Data Sheet and the motor tested good. Replaced the Motor Control Board. The washer is up and running. In hindsight I should have ran the diagnostic test from the start since that is what pointed to the motor. The Motor Control Board had a burned spot where it had shorted. My advice; try running the diagnostic to see what it reveals. 

After checking to make sure the drum and motor spun freely, I decided to change the motor control board. It was fairly easy, after unplugging the washer and turning off and disconnecting the water supply, I removed a few screws to take off the back of the washer. On my model it wasn't the whole back panel, but a large hatch opening with RAZOR SHARP EDGES that cut my hands and wrists like a razor blade. I didn't even know I was cut until I saw the blood, so be sure to DUCT TAPE THE EDGES before reaching in to work. I located the motor control board, which on my model was on the lower right side. After removing one screw and disconnecting four groups of wires, I realized it wasn't going to come out without removing the motor, which was just three screws and the belt. After that I just attached the four groups of wires, screwed it back in place and reattached the motor, belt and back cover. After cleaning up the blood I reconnected the water and power, did a test load and it worked perfectly. 

From the Appliance Parts Pros website and YouTube videos, I started with the most common problem these washers have, the Door Latch. The Door Latch replacement didn’t fix the problem, so I then went to the next most common problem, the Motor Control Board. Sounded pretty intimidating but after watching the videos, it looked doable. I had to remove the motor to get the control board in place, but that didn’t wind up being a big deal. I got all the wire connectors plugged back in and the washer is now working again. The repair video from Appliance Parts Pros was very thorough and well done and made the repair pretty simple. When they warn you that edges may be sharp you should believe them. I wound up covering the edges with duct tape after getting a small slice. 

Checked the ohms for the motor. Controller failure on 12 year old Galaxy. Easy to replace. Heads up the motor is heavier than it looks. 

I watched the video on how to replace the motor control board and it went smoothly. Washer works great!! 

Replaced the motor control. While at it, I changed the shock absorbers.