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LG Combo Washer/dryer model WM3677HW not drying

31 posts in this topic

Hello!

I am having a similar problem to a post noted in 2011, but I'm not sure what he did to fix it. So this is what I have. I have a WM3677HW LG combo washer/dryer that is not drying. It is washing fine. It then takes forever to run through the dry cycle only to give us soaking wet laundry and sitting water in the bottom. We have extensive work done on it without results. Here is what has been done. The filter board was replaced because it had at some point overheated apparently early in it's lifecycle according to my repairman. He has serviced it frequently and said it "always looked that way." The second repair man saw it and replaced an filter board. He replaced a main board. He then replace the valve assembly. He then replaced thermistors. He then replaced the main board, valve assembly and thermistors all at the same time. Each time it has been worked on. It seems to work completely one time before reverting back to its old pattern of soaking wet clothes. From the forum, we tried something today. We checked the resistance of each solenoid on valve assembly. Each was around 500 ohms. Then we ran a load of clothes through with the dryer valve assembly "unplugged." Wellah! Dry clothes. However, it took three times as long to dry than usual What do you make of this crazy thing? We would definitely appreciate some help with it. We purchased it originally because venting and the 220V on a conventional machine is not a real viable option. I hate to throw in the towel, but I cannot keep paying for service bills that don't fix it. Thanks!

Edited by DurhamAppliance

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When you disconnected the valve and ran it were you backed up on laundry and did a full load? Remember, when using a combo washer-dryer you can only do half loads. If you fill it up for the wash cycle there isn't enough room for air flow during the dry cycle.

You may have nailed the problem but tested with an oversized load.

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Thank you for the suggestion. I don't think it was overloaded, but who knows. We have used the machine for a few years now and have done ok until this last bout. Any clue what it could be? Why does it work right once and then revert after part has been replaced? Not sure what to do with this new knowledge. Thanks again. Grasshopper

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Provided the dryer element, thermostat and fan are good, it almost sounds like an intermittent draining problem.  Lint filter clear of restriction and drain pump running ok?

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The water seems to drain fine during the wash cycle.   We are not sure about the dry cycle draining.  There may be an issue.   Here is what happened...we "unplugged" the valve assembly plug that adds water during the dry cycle.  Wellah, the dryer works fine, but it dries hot because there is no water being added.  It seemed that the pump did pump, but maybe not as well when we did plug it back in?   All of the lint filters have been professionally cleaned.  It would leave the drain pump suspect? 

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Taken from the training manual, pretty basic operation.

The dryer portion of the COMBO is a condenser type dryer. It works on the

principal that water condenses on a cool surface, similar to moisture collecting on

a cold drink on a hot and humid summer day. A fan circulates air through the

warming duct, drum, and condenser and over and over. The air is warmed

because warmer air holds more moisture than cooler air and the heat causes

more of the water to be evaporated form the laundry. The warm, moist air is

directed through the condensing duct, which is cooled by a spray of cold water.

This difference in temperature causes the moisture to precipitate in the

condenser, where it and the cooling water are exhausted by the drain pump. The

air, now dry, is passed over the warming element and through the laundry again

as the process repeats itself. Because the air is recycled instead of exhausted, a

vent and lint filter are not necessary for this type dryer.

Heater malfunction check

post-83029-0-77640700-1375815974_thumb.j

Fan malfunction check

post-83029-0-14553600-1375816037_thumb.j

All of the parts in this image need to be cleaned.

post-83029-0-06710200-1375816199_thumb.j

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<<<It is washing fine.>>>

<<<It then takes forever to run through the dry cycle only to give us soaking wet laundry and sitting water in the bottom.>>>

<<<We have extensive work done on it without results. Here is what has been done.>>>

<<<The filter board was replaced because it had at some point overheated>>>

********

Not necessary to replace if---the plastic appears distorted/warped (not defective).

********

<<<He replaced a main board.>>>

********

Not necessary. A wild guess that did not pan out.

********

<<<He then replace the valve assembly.>>>

********

If the COLD WATER VALVE ASSY was replaced---the ***correct*** part number should be: 5220FR2008E

********

<<<He then replaced thermistors>>>

********

Pointless. Thermistors virtually *never* fail in the LG combo.

********

<<<He then replaced the main board, valve assembly and thermistors all at the same time.>>>

********

Time for a straight-jacket---and a trip to the psych ward.

Plan of attack as follows...

1) Remove the DUCT from the tub. Pay particular attention to the area of the duct---where it connects
to the bottom of the tub. Clean the duct system thoroughly.

2) Replace the DRAIN MOTOR (4681EA2001T)

3) Verify that the COLD WATER VALVE ASSY is the ***correct*** one. If not---replace it (5220FR2008E)

Repeat the above steps---every 3 years.

Laundry can be loaded into the tub---3/4s full.

When the laundry becomes wet during the *wash* cycle---the laundry will *sag* within the tub---to approximately 1/2 or less of the tub opening.

This will permit faster drying---than an overloaded combo unit.


Oops. Have to be careful not to be a bully with my knowledge---nor to overly favor the LG brand in particular...Good luck:)

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:woohoo:

 

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Mucho domos for the excellent assist on this one, Brother John! How I've missed your parsing prose patiently stepping us through the problem and to the solution.

And welcome back, I hope!

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Thank you John63 and all others for your thoughts!!   The funny thing about the repair history is he was talking to LG when he replaced all three.  I do need a straight jacket at this point, but the repair may be coming more obvious.    The duct that you are referring to, is that the one on top of the unit?  If so that has been cleaned multiple times.  We did a little further testing today.  We ran the unit plugged back in (valve assembly) and it sounds like it is pumping out water on the wash cycle, but we don't think it goes as well as it used to.   The stumper is why does it not pump out water when it dries.  It sounds like it is trying.  Clog or bad pump?  Also, could this be why is seemed that there was water sitting in the drum. 

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... he was talking to LG when he replaced all three.

and I got a bridge for sale to you .

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Ocean Front Property in Arizona?

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Ok, ok! No bridges or waterfront property in Arizona. Any other helpful advice?

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<<<The duct that you are referring to, is that the one on top of the unit?>>>

**************

Not so much the top portion of the duct---but the bottom---where the duct attaches to the rear of the tub. If the combo is used heavily (8 or more loads of laundry per week)---a large blob of lint can accumulate. This obstruction would restrict airflow during the dry cycle.

**************

<<<We ran the unit plugged back in (valve assembly) and it sounds like it is pumping out water on the wash cycle, but we don't think it goes as well as it used to.>>>

**************

Drain Motors can fail---but still operate/run.

A "tired/slow" Drain Motor will cause damp-to-wet laundry at the end of the dry cycle.

Typically---an LG washer (not a combo) Drain Motor has an average service-life of about 5 years.

An LG Combo (washer & dryer) Drain Motor can wear-out or fail in as few as 2 years---with heavy use.

This is due to the increased run-time of the Drain Motor---in a combo.

The COLD WATER VALVE ASSY in the combo is unique in that one of the valves has an orifice within it---to restrict the amount of water entering the Duct Assy during the dry cycle.

The failure rate of a Cold Water Valve is also higher in the combo unit.

It is also not uncommon to find that an incorrect Water Valve has been installed. An incorrect valve will allow *full/wide-open throttle* water to enter the Duct Assy during the dry cycle.

If this is the case (incorrect valve)---the laundry will *never* dry.

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John63 and Dean of Appliantology... Thank you for your help and additional clarifications. All helps! Found the service manual online so with that and your help I'm sure we will get it figured out! Many thanks!

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Domo for the update!

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Ok I'm back!  This time I haven't had the repairman here to fix the combo.  We all know what happened the last time!   I think the current problem has something to do with all the parts that were removed, replaced and messed with from the last debacle.   So, I'm asking you the guys who know what you think.  The appliance shuts off during any/all cycles at any time about once a day sometimes on a consecutive load and sometimes not.  It gives the error code "PE."   Go!  Thanks in advance for your ideas! 

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"PE" error:

 

Water Level Pressure Sensor Error.

 

 

1) Verify that the black tube is still connected to the Water Level Sensor at the top of the washer---and to the Air Bell at the bottom of the tub.

 

2) Remove the black tube from the Water Level Sensor---and blow into tube---to clear a possible blockage. Reconnect and test washer.

 

3) Water Level Pressure Sensors (6601ER1006E) *rarely* fail.

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Will do! Thanks!

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All of the things suggested above are checked and appear ok.  Occasionally, it leaks water out of the right front corner... may be a completely separate issue from the filter basket.  The PE problem occurs so randomly, but often that with the afore mentioned things checked, it does seem like electronic.  Any other things that we could check to narrow it down to the water pressure sensor or what the other symptoms might look like?  Thanks again.

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<<<Occasionally, it leaks water out of the right front corner...>>>

<<<The PE problem occurs so randomly>>>

**********

Try removing the Water Level Sensor hose---and blow into it (toward the tub/not the Water Level Sensor)

Test/Run a few laundry loads.

If the "PE" error returns---replace the Pressure Sensor (Part number: 6601ER1006E

Part number: 6601ER1006E

 ) and the Hose (Part number: 5214FR4125N

Part number: 5214FR4125N
 )
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Unfortunately, we are still messing with this appliance.  We tried the above things.  We are still getting the PE error.  Should we order this part?  The drying portion seems to get hot and it seems to be leaking quite a bit sporadically from the bottom left corner.   Thanks for your input.

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<<<We tried the above things>>>

 

**********

 

What things?

 

**********

 

<<<Should we order this part?>>>

 

**********

 

 

Which part? The Water Level Sensor?

 

**********

 

<<<The drying portion seems to get hot>>>

 

<<<it seems to be leaking quite a bit sporadically from the bottom left corner.>>>

 

**********

 

Resolve the "PE" error first---then determine if there are secondary failures/faults.

 

The Drain Hose on the LG combo is---however---known for developing a "split" near the Drain Motor (where the hose turns/bends at the point where it is connected to the Pump Assy).

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Ok, I know I should probably give up on this machine... but I cannot.  So... I'm hoping you will help me out again.  The thing has been giving the PE error again in both the wash and dry cycles.  It gets really hot.  It has helped if I run a fan in the room while it's on, but it seems to be failing to help anymore.   All of the above were done.  Is it possible the thermistors are bad?  I know that they were replaced by the repair guy in the last year or so by the guy who failed to fix the original pump problem.   Or should we try the water level pressure sensor again? 

 

Appreciate your thoughts!  Thanks!

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