How to Troubleshoot & Replace Lg AP4997248 / MFZ32863101 Pump Gasket

I remove the dishwasher laid it on it's backside, took off the bottom panel everything was easy to access. while I had the dishwasher out I just decided to replace the motor as well, I've noticed in the past the motor had been making some abnormal noises.Only reason I knew it was the motor making noise is because I own the same dishwasher, the repairs I just made were on my moms dishwasher, she's owns the same exact dishwasher as I do. After three years of owning my LG I had to replace the motor because it completely went out and it sounded like hers was doing the same. But as for why the drain hose cracked in half that's still a mystery... All in all it has been a decent dishwasher but for the price and the repairs that had to be made on both I won't be purchasing anymore LG dishwashers, but at least LG has made them easy to work on...!! I thank Appliance Parts Pros for offering these parts that were very reasonable priced, the availability, and the shipping options. I will definitely be using Appliance Parts Pros for all my appliance needs and I highly recommend them to anyone. 

I replaced the upper nozzle guide, nozzle shaft and upper spray arm. I also replaced the pump gasket for good measure. Top rack dishes had not been cleaning properly. I first removed the filter assembly to inspect the main pump from above. It was clogged but after cleaning and reassembly I observed that while middle and bottom spray arms were changing position, the upper spray arm was not. I confirmed that water was flowing through the upper spray arm by placing some empty yogurt pots on a baking tray on the top rack. The ones underneath the spray arm filled up. I tried cleaning the spray arm by removing it and flushing it with water but that didn't help. When spinning the upper arm by hand it tended to stop after a few turns so I wondered if the shaft had worn down and was creating too much friction for the nozzle to turn. So I ordered replacement upper nozzle guide, shaft and spray arm and tried them out. On the same order, I took the opportunity to replace the filter assembly (still a little clogged), the pump gasket (showing signs of wear) and some broken dish rack rollers. After replacing all those parts, the upper spray arm was back to working order. 

Replaced the circulation pump and related rubber gaskets, seal and the rubber check valve. Didn't realize how noisy the unit had become until after I replaced the pump. Now we don't even hear it when it's running! Was easy to replace with basic tools, just like the videos. RM 

As usual the replacement parts were spot on the repair video was accurate. The hardest thing was getting on my knees as being labeled a senior citizen still better than paying 5 times more for an easy fix. Don’t get me wrong I still don’t mind paying a professional for their work when it’s beyond my skill set and abilities 

I am not very handy at all, but with the video help and the parts I ordered from ApplicancePartsPros.com, it was a very smooth experience. Thank you for showing a non-fixe,r how to do replace the filter so that I didn't have to call the repairman. Thank you! 

I looked at the parts list and figured that it could only be the circulation motor because it was draining and filling just fine. Actually aside from the noise, it was working just fine. So to be sure someone else agreed with my assessment I called APP's and spoke to Garret. After a few questions, we agreed it was either the impeller or the motor. So we ordered a new motor, impeller and pump gasket. I was surprised to learn it would be delivered so quickly, So I set out to watch the repair video on the Appliance PartsPros website a couple of times and gathered the few tools recommended for the repair. The parts came in a couple of days and I started to do the repair using the sequence from the video. I was amazed at how accurate the video was at what I was doing. Total time to test run? Under 2 hours... that’s it and a lot of that was getting the cabinet empty before I started. After watching the video I felt like I had done it 50 times before. The only thing the video didn’t address was the leftover water in the sump. I used an old Turkey blaster to suck it out and that worked fine. 

Machine: LG dishwasher LDS5540ST Symptom: During wash cycle, dishwasher sounded like a bumblebee driving backwards in an old stick shift car with worn out reverse gears. Zwrrrrrr. This condition started suddenly one day, and persisted. Initial inspection: Removed components from inside, to check for any foreign matter, and found none. Noticed at this time that the pump gasket was limp and loose, so made sure to order a new gasket together with new circulation motor. Special tools: From prior repair work, I had a 16 mm crowfoot wrench, ideal for removing my inlet hose in the cramped lower front area. Would recommend that people either buy or cobble together some sort of extra-short stubby hand tool for this, and test it while waiting for the replacement motor to be delivered. Also had necessary hose plugs for the inlet hose end, and the disposal hose end. Makes the job tidier. Procedure: Some online videos showed detailed steps for removing inside components (e.g., turning the reverse-threaded screw on the circulation motor shaft), tilting the dishwasher onto its back, and replacing the motor. The videos were very thorough, but I would add my own caution: the plastic wire harness that plugs into the motor's connector has delicate side locking tabs. See these, and press them with respect, to avoid snapping plastic. If they snap, the fit is still snug anyway, but best to keep everything in one piece. Outcome: The new motor and gasket have been performing great. 

I watched a suggested video about my model and was able to easily take apart the filter unit and access the drainage area. I found a worn out "Float" Valve. In the process of replacing the float valve I went ahead and replaced a gasket and the Valve, Check. Repairs went great. Parts were a perfect fit. This is the second time I used AplliancePartsPros. 

I ended up with two sets of orders. The lower housing was cracked and I replaced that but it did not fix the issue, only a slight improvement. Through the diagnostics menu I figured out the diverter motor was defective and not switching to clean the upper rack. After changing this everything is working great. 

I went on you tube with the noisy motor issue and this site gave me the answer, so it was an easy fix. I just watched it a couple of times, no real tools involved, screwdriver, I just unplugged washer, no need to unhook water, I did buy the extra washers / gaskets recommended and you will need them so that was good. Took my time all in 45 minutes and it works great like a new machine. This would have been a $500 repair if I called someone. Thanks guys, I have now repaired my fridge, oven, and dishwasher with you and they're not that old. The new stuff today just does not last and I didn't buy the cheap ones. Dave O.