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LG Dishwasher - new drain issue. Advice needed please.

I'm sorry if this sort of issues has been done to death, but I can't find ant suggestions that relate to my specific problem. My LD1452 dishwasher displayed the OE error, and so I've checked all the drain hoses and internals for blockages etc. I've also fitted a new pump but the issue still remains. I'm doubting the old pump was faulty.

When the cycle starts there's a 3 second whirl of the new pump and then it fills with wash water and goes through the wash cycle, but won't pump the wash water out before it goes into the rinse cycle. At the end of the rinse cycle the dishwasher quits and displays the OE code.

By pressing three buttons on the door panel I can get the pump to pump out, although not consistently, and I can get a new cycle to start again, but with the same issues.

Could the circuit board be faulty?

Also, I've read confusing statements about the water level sensor that seems to be called a "turbidity" sensor. Can someone please clarify.

Finally, if the water level sensor/turbidity sensor is faulty could the drain pump be getting a signal that it's not needed??

Any help would be appreciated.

Thanks,

Répondre à cette question J'ai le même problème

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8 solutions

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Take a look at this:

https://removeandreplace.com/2017/03/15/...

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Thanks Sam.

I've been right through all the items in that link. Still nothing seems to work!

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johng, I had a similar issue with an an LG dishwasher. Mine turned out to be a little flap of rubber that is supposed to prevent the waste water from coming back into the bottom of the dishwasher. When I took the bottom of the dishwasher apart that little flapper was in two pieces. After replacing that my dishwasher drains as it is supposed to. Hope this helps.

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Thanks for the tip. I've noted comments on that rubber flapper. It was fine. I'm pleased your issue was solved.

Thanks.

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Well, I have an admission or two to make.

I've had the dishwasher outside for dismantling and installing a new drain pump and/or running through its cycles, and I noticed by chance that if the drain hose was at a certain height, the washer ran through a full cycle OK. As I've read somewhere, the pump needs a certain amount of back pressure to operate correctly.

My admission is that I didn't take the hose height and air gap requirement seriously.

I've also had an extension on the drain hose of about 750mm for 5 years without apparent problem.

When I originally pulled the drain pump out, there was an olive pip inside. But with the olive pip removed, even with a new pump installed, I had continuing drain issues, probably because of the drain hose location and height.

So I reinstalled the original pump, and with drain hose at the correct height, ran through several cycles without a glitch.

Over the last few years there has been several OE drain issues, that I now think could be related to the fact that when the sink is in use, there is no air gap, and so if the dishwasher is running, the drain pump has to push water past the S trap to drain away. I've now installed a stand pipe that drains directly to the drainage system without going via the sink S trap. I presume sink's with a built-in overflow provide the air gap, but otherwise many drain hoses could be installed incorrectly if connected to a conventional sink S trap.

So thanks for taking the time to consider the problem. Maybe had I stepped through Sam's link with more care I might have arrived at the solution more quickly. But I've learned quite a bit in the process!

Thanks again.

John

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I don’t believe that air gap can make problem dishwasher not pushing water it is drain pretty slow and water go it self under gravity. Your drain hose 3/4 sink dray1.5 inch. Cheery

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John, I am having a similar issue with my LG dishwasher giving an OE error. I went through a lot of diagnostics and all plumbing looks good. I concluded that the height position of the drain pipe/air gap assembly is the issue. But this dishwasher has been installed for 5 years without a problem. Sink has a p trap (no s trap). But somehow now it gives the OE error. But if I drop down the air gap/drain pipe from the sink counter to under the sink then no problem.

I did take the dishwasher out and by moving the drain hose higher and lower I can see a big difference in the amount that drains. So my conclusion at this time is the pump is not working 100% and cannot push enough water through with the hose is in the higher position. I cannot change the hose position/air gap at the counter level. So seems like the pump performance must have changed.

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Sounds similar to my issue. Have you checked inside the pump to make sure there's nothing stuck in there? Also are you aware that if you hold down two control panel buttons at the same time you can operate the pump manually?

Like mine if it's worked ok for 5 years then it can't be the drain hose height issue. But the only thing I really did with mine was remove the olive pip from the pump and modify the drain. I'm still not 100% sure what the actual issue was but it's worked flawlessly ever since.

Good luck.

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Good answer That happened to me too.

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Thanks Johng. I did check the pump and didn’t find anything inside it. The rotor moves freely. Yes, I’m aware of the two buttons to run the drain pump. I have used this to drain the tub in the dishwasher. It’s interesting that on the LG dishwasher the pump works on cycles - it runs for a few seconds, then stops, runs a few seconds…. So it doesn’t do a complete drain in one shot. I happen to have another LG dishwasher same model and it does the same thing when running and draining (and it works fine). So I think at this stage I will try a new pump and see what happens.

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Replaced the pump and all ok now. So bad pump was the reason for the OE error. I hope this is not a general problem with LG dishwashers.

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Hey Ambrose, was reading about your issue and the solution in installing a new pump. Would you say this is easy enough to do yourself? Did you hire someone? Just curious because I need a new pump but want to save money on replacing it.

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These LG dishwasher drain pumps suck!!!

I’ve been through 2 in about 7 years now and I just had yet another one fail on my LDF7551BB.

This pump is a little 3-phase AC motor driven by a small inverter on the control board. The inverter also monitors the 3-phase current draw to determine a “acceptable load range” of the pump’s impeller.

The pump impeller and its supporting bearings are completely mechanically isolated from the “electrical” side (3-phase windings) of the pump assembly so as to prevent leakage into the wining section of the pump assembly.

It seems that the bearings on the mechanical-side go bad and allow too much radial runout and/or thrust free play. The motor/inverter then go into a “tizzy” and the impeller then starts to either work only “sometimes”, work poorly, or in another case, not spin at all.

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Hi guys, I have trouble for a while with my dishwasher D1484CF, which two buttons I will need to press to operate pump manually? I did try all combinations and I cant get that working. I did change 2 new pumps, moves drainage house, checked ohms on pumps, all good in range, voltage looks fine coming from main board etc and I still cant get that working. Last engineer came and replaced main board but that didn’t solve the Problem. One or two cycles will run ok and than again OE error. I hate that sound now. 4 times engineer appointment was cancelled On that day, so keep calling LG about new appointment date. Its been two and half months now and still not working. I did try everything and i am at the stage probably buy new dishwasher. Any other suggestion what to try before I will …

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johng sera éternellement reconnaissant.
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