Question about Maytag Neptune FAV6800AW Top Load Washer
My washer began to take UC and dc errors to the console board during a wash cycle. I first verified the tub displacement sensor which read 2.7 VDC at all times regardless of the position of the sensor. I ran the TDS diagnostic test in service mode which began with it telling me it was UC. Obviously the sensor is bad, so i replaced with a 1.5 VDC battery. (Not sure if the output from this sensor was a square wave though, which could be causing me issues, also one of my questions?) But regardless the diagnostic tests now begins by telling me its "in". So I ran all the other tests in service mode, the washer passed ALL tests with the exception of the quick service cycle, which gave a dc error. I also tried to wash clothes with a normal cycle and it fails once in the wash cycle with a UC and then after pressing play it fails again in the spin cycle after it begins spinning and pumps all the water out. I cannot get passed this point in the cycle. I can, however, then quit the normal cycle and run a spin cycle only and it will complete (odd to me). I read various posts on the site which indicated this may be a clutch issue. So, I removed the clutch and relubed, everything tested out ok, both prior to the relube and after, i.e. spring in tact, no slipping. But now when I reinstalll the clutch and reseat as required the pulley will not spin in one direction. It will spin the tub but when the motor or hand tries to turn the pulley in the opposite direction the belt slips and starts to screech. My clutch has the green top clutch roller bearings along with the white bottom clutch roller bearings with the coupler between them. Please help me with any explanations....
You’re a owner/DIY’er type I enjoy working with I'm a technicial owner also not a repair person. Warning my post are long but with no BS or WAG's.
Good job troubleshooting except for the external 1.5VDC battery. I understand what you tried to do The TDS takes +12VDC into it and signals +3.0VDC to 0.0VDC for the full range of motion of the TDS and as you are aware approximately +1.5VDC for center position. So the Control Board sees analog DC swings from the TDS not a digital 1 or a 0.
Was your washer banging around during the start of a Spin Cycle of a wash Cycle or a Spin Only Cycle causing the original dC/uC unbalance errors? If not the TDS may have been bad from the get go. You will have to explain to me how you clip leaded in that 1.5VDC cell I’m curious. Keep in mind the +12.0VDC power supply on the Control board is referenced to the control board not machine Chassis ground. Here is a pic of me measuring +12.0VDC indicating that the lid latch is closed. I pick up Control Board Common from the lead on the cap I show on the board.
OK knowing that is this how you measured the +2.7VDC referenced to Control Board Common and Conn P3 Pin 11 the TDS Sensor input to the Control Board? Some Pics to help.
Also Check for corrosion at the 3 pin plug of the TDS.
You are performing your measurements at Conn P3 pin 11 TDS input and Control Board Common correct?
Let me know what you find. This BS board has message limits so I will post on Clutch issue in the next comment.....Rich
Posted on Apr 23, 2010
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Posted on Jan 02, 2017
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Aug 20, 2011 | Maytag Neptune FAV6800AW Top Load Washer
Google this Neptune TL Washer FAV6800AWW 5 post down.
Here ya go.....in this post I discuss the issue related to unbalance error codes DC and UC;
Your FAV6800A or FAV9800A is going off balance with DC or UC unbalance error codes during spin cycle and you see/hear the wash tub banging around at the start of Spin Cycle of the wash cycle or a Spin Only cycle. If this is the condition the TDS (Tub Displacement Sensor) is working as designed and signaling the Control Board properly of an unbalance wash load condition.
The Control Board receives a varying D.C . Voltage from the TDS sensor and if the out of range D.C. Voltage limit continues the Control Board will halt the Spin Cycle and try to redistribute the wash load. If you are interested I will show you how to monitor the TDS input to the Control Board with a DVM.
The Control Board then starts the Spin Cycle again. If the wash tub/basket out of balance condition continues the Control Board will attempt another redistribute of the wash load. After several attempts (4 to 5 I believe) the Control Board will shut down the Spin Cycle and send a error code DC or UC to the LED display of the FAV6800A, my machine type. And I believe a text statement to the LCD screen of the FAV9800A machine i.e. something like "Unbalance Condition" I'm not sure what the text message is.
If you need help open a post in that repair forum and I will try help you through your issue.
The forum is free and my time is free I just don
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