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Re: beeping and red light stating U3
Hi and welcome. You posted your question in the DD/DS603 series section, but code U3 is usually seen on a DD/DS601 or DD602 series. When this code appears, most comon cause is that the machine is set in LP or LOW PRESSURE mode and needs to be set to HP or HIGH PRESSURE. The fault is sensing water level too high in the drawer, which can also be caused by a blocked drain or inoperative pump. I can tell you exactly how to tell if the machine in in the wrong mode if you can tell us the correct model number. The machine's pump/drain system can easily be checked by putting the machine in diagnostic mode and running the drain pump.
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One that is most common is due to water not filling in time before the wash cycle commences. This can be due to water pressure setting not being consistent with the mains water pressure. Check this by confirming if you are in low water pressure or normal pressure area. The dishwasher should be set at LP or HP accordingly. Refer to the manual for the procedure.
I realize the above question is almost 4 years old, but I am sure others are still having this problem. My Danby was behaving the same way: drying cycle light would flash like it was having a myocardial infarction, and the cycle would stop. I could only get the light to stop flashing by turning the unit off. What you didn\'t say above is what happens then: everything most likely returns to normal-- or at least, so it seems. I have now had this happen to me two times in a row with my Danby 1899WP. Each time the machine has started up just fine, drains water out, loads in fresh water, and begins the wash cycle, only to freeze up with that damn flashing red light on the dry cycle and the dishes not clean. I have owned it for about two months, and so far this is my only complaint. I am running it again right now, for the third time, and we shall see what that light does now.... Will report back afterward!
U3 means the tub filled to quickly or the water failed to drain. Do you have very high water pressure? are you using the wrong detergent? eg you can't use tablets (powerballs) etc in the unit. Try putting half a cup of white vinegar in the tub to kill any foam. Check there isn't anything stuck under the motor rotor inside the tub and the there's no signs of damage. Put the drain hose in a bucket and see if the water drains ok when the unit starts? If everything seems ok I'd suspect the main motor controller module but it may be worth getting an appliance tech to inspect unit first as it's hard without seeing this unit. feel free to ask any questions. Cheers
That's a "Low Pressure" fault and it's possible you may only need to reset the mode. This question is posted under DD603 but a U3 code is usually associated with the 602 models. I am including an instruction for you on how to check the setting. Start with that first, it is easy to do. Let me know if you are not able to read the text.
According to the GE repairman who visited, the solution is to close the machine (with the lights flashing). The machine starts and goes through the cycles, which it does rapidly and then all the lights turn off and the machine becomes silent after 1-1/2 to 2 minutes. Then the machine has been reset to normal. During this reseting period nothing happens inside the machine, although you may hear a running sound.
Thus, the solution is to run the machine in this flashing light state for the 1-2 minutes it takes to go raipdly through each cycle and then reset.