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My matsui mtt4w dishwasher is leaking water and displaying error E1. Any ideas?

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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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  • 1 Answer

SOURCE: E1 Error Message

Just had the same problem.It is a common defect of the standard pump motor assembly and LG recognises it and sells the whole assembly for $38. They changed the type of motor and now is 120W instead of the original 45W. They also supply a modified bracket to fit the new motor.

Posted on Jul 30, 2007

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SOURCE: E1 error on LG - LD-4120M

E1 is a common error in the LG Dishwasher range and is usually caused by the failure of the circulation pump and/or the impeller.

The motor and impeller are a complete unit.

Often what happens is the impeller breaks on the motor shaft and doesn't spin, therefore doesn't pump water.

There is a pressure sensor which indicates the lack of pressure and shuts the machine down with the E1 error being displayed.

The lack of pressure can also be from a water leak (as the owners manual suggests) also a controller PCB fault may produce an E1 error, however, the pump problem is extremely common.

Unfortunately, I have had 5 pumps die in 4 years and my dishwasher is only used about 4 times a week.

Posted on Dec 27, 2007

SOURCE: E1 Error on LG Dishwasher (LD-2040WH)

Maybe the blockage is somewhere else. How about removing all the trays from the dishwasher, in other words, empty it from all racks and dishes and try it again

Posted on Aug 13, 2008

  • 1 Answer

SOURCE: Lamona dishwasher from Howdens. E1 code

I had the same problem with my dishwasher. I ended up pulling it out and i noticed that the hose that feeds it water had been folded. I then restarted it and it worked fine but juse to test I turned off the water supply and there it was E1.
So in short, E1 is no water feed.....

Posted on Aug 14, 2010

  • 3 Answers

SOURCE: LG dishwasher LD-2120WHU I get the

This happens to my LG dishwasher every 6 months or so. It also makes a groaning sound as if the system is starved for water. The resolve the problem by removing the dishwasher and laying it over on it's right side. I then remove the two plastic assemblies that are on the left side and I remove them from the dishwasher (you will need a vice grips to remove the hose clamps from behind them, you will also need to remove the round circular water intake plastic disk that is on the inside of your dishwasher on the left hand side right in the middle of the left wall) and clean them. Once the water can run freely through these plastic parts you will get a good water flow and you should be fine. Until you have time to do this I recommend putting a few quarts of hot water into your dishwasher once you start to hear the groaning problem. This solution should be very easy for anyone who is comfortable doing their own oil change. Oh, and turn off the power supply first.

Posted on Nov 07, 2010

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Hi Chaz,

The impeller breaks on the motor shaft. The motor still turns, but the impeller doesn't, so it doesn't pump water. Because the machine senses there is no water pressure from the pump, it shuts down & displays E1 (it thinks there's a water leak, due to no pressure)
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The impeller breaks away from the motor shaft and doesn't spin, therefore, it doesn't pump water.

There is a sensor that activates with low pump pressure, which shuts down the machine and displays the error, E1.

The only other causes (that I'm aware of) are leaking water supply hoses, or pump blockage, but the motor fault is by far the most common.

Hope this helps.

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E1 is a common error in the LG Dishwasher range and is usually caused by the failure of the circulation pump and/or the impeller.

The motor and impeller are a complete unit.

Often what happens is the impeller breaks on the motor shaft and doesn't spin, therefore doesn't pump water.

There is a pressure sensor which indicates the lack of pressure and shuts the machine down with the E1 error being displayed.

The lack of pressure can also be from a water leak (as the owners manual suggests) also a controller PCB fault may produce an E1 error, however, the pump problem is extremely common.

Unfortunately, I have had 5 pumps die in 4 years and my dishwasher is only used about 4 times a week.

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