Author Topic: LG W/D Combo leaves clothes wet  (Read 4716 times)

Offline Los

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LG W/D Combo leaves clothes wet
« on: June 03, 2012, 09:15:24 PM »
LG W/D combo goes through entire cycle like normal but clothes end up hot, wet and steamed.  No error codes.  Any ideas as to what might be the problem would be much appreciated!

Offline AJ

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Re: LG W/D Combo leaves clothes wet
« Reply #1 on: June 03, 2012, 09:20:36 PM »
Hi,

It would be helpful if you could post the model number for us, thanks.
Hope you find our site helpful.

Offline Los

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Re: LG W/D Combo leaves clothes wet
« Reply #2 on: June 03, 2012, 09:30:39 PM »
My mistake, wm3677hw.

Offline AJ

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Re: LG W/D Combo leaves clothes wet
« Reply #3 on: June 03, 2012, 09:53:46 PM »
I have never worked on one of these, but maybe another tech will have some advice on it.

Here is the service manual for it.

WM3677 WD-12270 LG Washer & Dryer Combo Repair Service Manual

About how old is it?
Hope you find our site helpful.

Offline Los

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Re: LG W/D Combo leaves clothes wet
« Reply #4 on: June 03, 2012, 10:47:49 PM »
bought in 2005.

Offline clman

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Re: LG W/D Combo leaves clothes wet
« Reply #5 on: June 03, 2012, 10:55:27 PM »
Is there any water being left in the drum at the end of the cycle? When you say wet do you mean damp, soaking or inbetween? What do you mean by steamed?

Offline Los

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Re: LG W/D Combo leaves clothes wet
« Reply #6 on: June 04, 2012, 10:56:28 AM »
The clothes is not soaked but beyond damp where you can squeeze water from them, the heat is very high causing steam from the moisture on the clothes when you open the door.

Offline clman

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Re: LG W/D Combo leaves clothes wet
« Reply #7 on: June 04, 2012, 11:35:55 AM »
Sounds like the blower in the drying mode may not be running. The first thing I'd do is check and clean the plastic exhaust duct in the inside right rear below the blower. This duct commonly gets clogged up. It needs to be removed and rinsed out. That's a maintenance item anyway. Take the top off and go through the test mode to make sure the blower is coming on. If it is clean the duct and try it in a regular cycle. If it's not check for voltage to it at the point that the test mode chart indicates it should be running. Have voltage - no run = bad motor. No voltage - bad m.pcb or wiring issue.

Check those things and post a result.

Offline Los

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Re: LG W/D Combo leaves clothes wet
« Reply #8 on: June 07, 2012, 08:46:52 PM »
Cleaned condensing duct - was heavily clogged.  Put everything back together and went into QC test mode, on 13 don't think I heard the blower motor come on and got a DHE error - which apparently could mean three things -
The Dry Heater is out of order.
- Replace the Dry Heater
The connector of the Dry Heater is not connected
properly to the connector in the main PWB ASSEMBLY.
- Reconnect or repair the connector.
The Dry Fan Motor is out of order.
-Replace the fan motor.

Not sure what the dry heater is - is the the heater coil?

Thanks

Offline clman

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Re: LG W/D Combo leaves clothes wet
« Reply #9 on: June 08, 2012, 02:17:52 AM »
The dryer heater is the heating element. But you said the clothes were hot so that would mean the heater should be working. The dhe code should have shown up in a non test mode cycle but sometime the pcb fails to show codes when it should. Recheck your heater and thermostat wiring and when in test mode make sure the heater gets hot at position 10 ( for 3 seconds - as the serv manual says ). And then that the blower is running at position 13. LG does not describe what the readings should be at the multiple pins of the blower connector and I have never had to go that far in diagnosing a blower failure. For now you have to assume that the blower motor is bad if it does not run when in test mode 13. The other possibilities are the main pcb is not turning on the blower or that there is a wiring fault between the m.pcb and the blower. Those other possibilities would be very rare. I can try to get more detailed info on the specs of the blower connectors but honestly don't count on me getting any good quality info on it any time soon.

Offline Los

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Re: LG W/D Combo leaves clothes wet
« Reply #10 on: June 13, 2012, 10:19:58 PM »
replaced the blower motor assembly.  clothes still hot but wet during drying.  could the dry duct thermistor be the culprit?

Offline Los

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Re: LG W/D Combo leaves clothes wet
« Reply #11 on: June 13, 2012, 10:24:45 PM »
haven't sat and looked at it but if the machine isn't spinning enough water away - what should I start checking?

Offline clman

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Re: LG W/D Combo leaves clothes wet
« Reply #12 on: June 14, 2012, 12:13:42 AM »
Did you verify that the blower was or was not running in test mode prior to replacing it?

Are you getting the dhe code, either in or out of test mode?

The heater is controlled by a high limit cut out t-stat (thermal fuse), a high cycling t-stat and the low limit thermistor. The high cycle t-stat and thermistor tell the pcb if the heater needs to be on or off. To test the high cycle t-stat check for continuity at it's closed and open temperature ranges. You'll need to put it in an oven set for the open temperature. Take it out once the oven has reach the set point and check for a lack of continuity. Then as it cools off expect it to click and show continuity. It'll be hard to determine exactly what temperature it's cycling at but this will let you know it's working to some degree.

The spin speed can be determined in test mode. Refer to the test mode chart. Since it does not tell you what the rpm should be I have to guess. I've been doing it so long that I just listen to the pitch of the machine and can tell if it's off or not. Besides I've come to kinda distrust the info the pcb displays to me. I've seen it be incorrect to many times. All that being said, and based on another machines specs, I would expect to see the rpm read out at 125 - 155.

I have had to change the stator and rotor to solve a clothes too wet problem in wash only models before.

Offline Los

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Re: LG W/D Combo leaves clothes wet
« Reply #13 on: June 14, 2012, 02:35:43 PM »
blower was not running and triggered dhe error in test mode before new blower install.  as for the thermistor, your saying I have to check continuity while it is hot?

I seem to be getting good spin speeds in test mode >120rpm.

by the way thanks for your help, much appreciated!

Offline clman

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Re: LG W/D Combo leaves clothes wet
« Reply #14 on: June 14, 2012, 03:01:16 PM »
Just to be clear - did you see the blower not run, hear the blower not run or assume it wasn't because of the error code?

If the blower is not running in test mode and is new, either the new motor is bad, the m.pcb is defective or you have a wiring fault. The m.pcb ignores all imputs to run the blower in test mode.

 

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