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LG LDS5811WW Diswasher problem but not throwing codes  Rating:  Rating
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 Posted: Sat Feb 14th, 2009 05:48 pm
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domer2k9
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I did get 120v between org. and brn. wires....I can run diag. but I'm not really sure what I should be looking for or at.  The table has a lot of info and frankly I'm a lil confused.

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 Posted: Sat Feb 14th, 2009 09:30 pm
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denrayr
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the board is good. your next step is to check for voltage from orange to the brown and black wire connection at the door switch. if you have voltage here you will need to check for voltage at the heater. if you have voltage at the heater then the heater is bad. the diagram says there are 2 fuses but doesnt show where they are. it seems like they are part of the heater. when you are down in that area trace the brown and orange wires to see if there are any fuses.



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 Posted: Sun Feb 15th, 2009 05:16 am
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domer2k9
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good to hear the board is good....I'll get on that stuff tomorrow

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 Posted: Sun Feb 15th, 2009 02:40 pm
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domer2k9
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Voltage at brown and black at door switch = 120V....(my unit actually has black and orange at the door switch, not brown and orange... with two orange wires going to heater)
Voltage at heater = 120V
No inline fuses found
When I run diag. I get a reading of 20/21 Celcius for temp (68 Faranheit)   What is that taking temp of?

 I ran diagnostic for heater with the door open and door and heater switches jumped out.  Heater does get warm with an electronic human thermometer....about 107 degrees F for the 10 second test.....So the heater looks good

Last edited on Sun Feb 15th, 2009 04:14 pm by domer2k9

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 Posted: Sun Feb 15th, 2009 05:23 pm
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domer2k9
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After viewing another post I tried running quick cycle........
Pumps out
fills
timer starts at 117 and pretty much hits a crawl at 115
at that point I added about 6 cups water and closed door
DW pumped out excess
timer at 114
motor runs for  several seconds and stops for several more seconds
motor runs for several seconds and stops for several more seconds
this happens about 6 times and then motor will run for about 30-40 seconds then goes back into short cycles......
At that point I had to see what was going on inside so I jumped the door switches and let her go with the door open......
bottom sprayer barely spins and very low pressure for the short bursts as mentioned above.....I let it happen about 3 times and then stopped it.
Only the bottom sprayer moved(barely) and had water coming out
through all this the timer never got below 113

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 Posted: Tue Feb 17th, 2009 12:04 am
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domer2k9
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Does anyone know what should happen during the diagnostics for the lower nozzle and upper nozzle vario tests (3A & 3b on the top display)?  I'm getting nothing at all...Anyone ever have problems with Vario system?  Plese stay with me here....I realize that I'm not the most talented troubleshooter...
Thanks

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 Posted: Tue Feb 17th, 2009 02:25 am
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denrayr
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the vario system wont cause your issue. can you run the diagnostics test again and report the amp reading on the heater during the heater test? you verified 120v but i didnt see an amp reading.



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 Posted: Tue Feb 17th, 2009 11:08 am
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domer2k9
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will do...but during diag. I did get 120V at the heater and it did heat up according to my digital thermometer.  If that indicates anything.  I'll get amp clamp from work today and report findings later.

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 Posted: Tue Feb 17th, 2009 03:38 pm
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denrayr
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do you think it heats during diagnostic but not during the cycle? At this point the heater test should be done when the dishwasher is stalled during the cycle.



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 Posted: Wed Feb 18th, 2009 12:51 am
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domer2k9
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Couldn't get the amp clamp today..I'll try again tomorrow

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 Posted: Thu Feb 19th, 2009 12:15 am
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domer2k9
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Current through orange wire going to heater during diag. = 10.21A
Current through orange wire going to heater during cycle never gets above 4.84A and that at the beginning after the fill....later on during the short bursts it never really went much higher than 4.5A.....

Last edited on Thu Feb 19th, 2009 12:27 am by domer2k9

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 Posted: Thu Feb 19th, 2009 12:15 am
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telefunkenu47

 

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anyone think to question the motor? Have seen some fail in similar way.



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 Posted: Thu Feb 19th, 2009 12:29 am
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domer2k9
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Basically focusing on the heater.  Any quick checks you recommend for the motor?

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 Posted: Thu Feb 19th, 2009 03:08 am
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I have this exact same model dishwasher I have to practically rebuild at LG's expense tomorrow. The wiring harness is broken down at the bottom of the door, the inner door liner is warped and the pump leaks. I can't wait. NOT!



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 Posted: Thu Feb 19th, 2009 05:54 am
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denrayr
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domer2k9 wrote: Current through orange wire going to heater during diag. = 10.21A
Current through orange wire going to heater during cycle never gets above 4.84A and that at the beginning after the fill....later on during the short bursts it never really went much higher than 4.5A.....


that is really strange, when you say short bursts how long are these short bursts

 



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 Posted: Thu Feb 19th, 2009 11:09 am
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domer2k9
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:(Nice to hear that Scott!  Good luck!!
The short bursts are about 2 seconds....with the door open the water comes out of the bottom sprayer with the pressure of say a water fountain.  Thats why I questioned that vario system which alternates water from bottom sprayer to top sprayer.  It seems water is routed through some type of manifold like tray and it has a vario motor to do whatever the heck it does.

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 Posted: Thu Feb 19th, 2009 04:17 pm
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  My 1 1/2 cents worth ( inflation )............... Remove the lower spray arm and look into the lower wash tower, the  little passages, are they clean/clear? Look at the pictures of a DW20  3251  ( on feb. 13 )...(I do not have your model number available)......the ports/ passages regulate the water levels...When i replaced the diverter valve, I was sent a new lower wash tower.....have you looked at the control board for any bad areas in the section of the board marked 5 dv..             Scottthewolf...................Keep us posted of the repair  (inquiring minds want to know).....

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 Posted: Thu Feb 19th, 2009 04:34 pm
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RegUS_PatOff
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certified tech group 51 wrote: ... Look at the pictures of a DW20  3251  ( on feb. 13 )...(I do not have your model number available)...LG  LDS5811WW Service Manual link on page :ooo:



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 Posted: Thu Feb 19th, 2009 10:26 pm
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denrayr
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domer2k9 wrote: :(Nice to hear that Scott!  Good luck!!
The short bursts are about 2 seconds....with the door open the water comes out of the bottom sprayer with the pressure of say a water fountain.  Thats why I questioned that vario system which alternates water from bottom sprayer to top sprayer.  It seems water is routed through some type of manifold like tray and it has a vario motor to do whatever the heck it does.


So the heat only stays on 2 seconds at a time during the cycle but stays on during the diagnostic test?

 

the vario system doesnt have anything to do witht he heat circuit. im leaning towards a control board issue at this point assuming it only cycles the heater for 2 seconds at a time.

Last edited on Thu Feb 19th, 2009 10:35 pm by denrayr



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 Posted: Fri Feb 20th, 2009 04:43 pm
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Thanks RegU.S.   Never keep your service manuals in the same color folders with out labeling them.........Makes one look foolish... ( and humble, I will bow out of this repair, who will listen to me now?)

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