[Desertrat28]

Duet Sport Elec Dryer (not a steam model) produces about 1oz.(measured) of water in the vent hose for every hour of run time. Previous repairs done, troubleshooting for Error Code F-02, tested everything out to the point of needing to replace the Console Control Panel, did so, which fixed the display and selection of cycles issues. Runs normally except for water in vent hose bend. Cleaned vent, from dryer exhaust to roof top vent, still collects water in vent hose. Followed Tech sheet diagnostics on pg.7 for Test #3a Exhaust Thermistor, (exhaust temps check out ok). Did Test#4 on pg. 8, Moisture Sensor, checked out ok. I've upped the drying mode(Test #4a, pg.9) in hopes of drying more efficiently (unit has always been overly optimistic regarding est. dry times), but still have the water in the vent hose issue. One note: whenever entering the diagnostic test mode, the Error Code F-02 still appears and won't let me make any changes until I press the +/- buttons a few times to display the normal 88 code, then everything else works as advertised. Any ideas on how to fix the water accumulation issue would be appreciated.

[denman]

Do you live in an area where the temperature gets below freezing?

Does the vent go to the hose bend and then straight up through the roof?

It could be that the vent pipe is not insulated up in the attic. Since it gets cold moisture condenses on the inside of the pipe and then melts and runs down the pipe to collect in the bend.

One way to check this out is if there is a coupler after the bend but before it leaves the dryer room. Disconnect it here and run a cycle to see if you still get water. If you want to keep lint out of the house take a pair of panty hose, put one leg into the other and then put this over the and of the vent pipe so it can blow out like a windsock.

I am assuming that the clothes are not overly wet when you take them out of the washer.

[Desertrat28]

Originally Posted by denman

Do you live in an area where the temperature gets below freezing? No, not normally.

Does the vent go to the hose bend and then straight up through the roof? Yes.

It could be that the vent pipe is not insulated up in the attic. Since it gets cold moisture condenses on the inside of the pipe and then melts and runs down the pipe to collect in the bend.

One way to check this out is if there is a coupler after the bend but before it leaves the dryer room. Disconnect it here and run a cycle to see if you still get water. If you want to keep lint out of the house take a pair of panty hose, put one leg into the other and then put this over the and of the vent pipe so it can blow out like a windsock. Alumflex hose from dryer exhaust to metal pipe elbow in wall then straight up to roof. Have not had moisture before, this issue just started within the last few months when the console panel went on the fritz. I'll try the pantyhose method to see if we still get water when disconnected from the wall.

I am assuming that the clothes are not overly wet when you take them out of the washer.

Nope, the washer is the matching duet sport and does a pretty good job of spinning out moisture.

Thanks for the tip, will give your suggestion a try. Any other ideas would be welcome.

[Desertrat28]

Tried the disconnected vent hose and pantyhose idea. Blew out like a windsock and spit moisture all over the utility floor so the moisture doesn't appear to be from a cold vent pipe in the attic. I'm no expert, but I'd guess that a dryer that puts out an oz or two of water via the exhaust pipe per load isn't working properly. Another issue is the moisture sensor must be wonky as the dry time is much longer than it should be. Any ideas as what is going on?

[denman]

I do not think it is a moisture sensor problem. Since you are getting liquid water out of the unit I would expect the dry times to be longer.

Did you try more than one load?
My thoughts here is that there may have been water pooled in the dryer from previous loads and it spit out when you did the disconnected test.

[Desertrat28]

Originally Posted by denman

I do not think it is a moisture sensor problem. Since you are getting liquid water out of the unit I would expect the dry times to be longer.

Did you try more than one load?
My thoughts here is that there may have been water pooled in the dryer from previous loads and it spit out when you did the disconnected test.

Yes, multiple loads have been run with the same results. Closer inspection shows some moisture damage to the sheetrock behind the dryer so this problem apparently is not new. The longer dry times have been dogging us for awhile and guess the moisture in the hose is why. Any thoughts as to which test I should do next before throwing parts at it? I'm not even sure which parts to throw?

[denman]

Any thoughts as to which test I should do next before throwing parts at it?
I cannot think of any additional tests.
You have checked the units temperatures and air flow and both are OK.
You have also said that the clothes are not wet when put in the dryer.
I am stumped!!

I'm not even sure which parts to throw?
Everything checks out OK so I do not know.
The F-02 is a electronic communication problem but the cycles run OK other than being too long so it does not seem to effect the units operation.

In my opinion the clothes must be too wet and the unit is spinning out the water. Perhaps try a load of wash that was washed in a different washing machine.

Only other thing I can think of is that the vent pipe where the unit is located is so cold that the moisture in the warm air is condensing out as soon as it leaves the drum but you have not mentioned this so it is a long shot.

Since I am stumped I am going to ask for help from other techs on the forum in the Tech Talk section.
Hopefully someone else has seen this and will help.

[richappy]

There is a possability you have turbulence someplace in the venting and like a stream with a rock,the air will just be turbulent at that spot, and moisture will precipitate out of the air. I use a pro air velocity gauge ( just a calibrated manometer) to check air flow.

[Desertrat28]

Thanks for both the replies. I'm not convinced the problem is in the vent piping as I did the disconnected test that Denman suggested with the same results, about one oz. of water in the alum flex hose. I'm (fairly) confident that the clothes taken from the matching washer are not overly moisture laden and even lighter loads (t shirts and such, not heavy towels) still cause the moisture in the flex hose. Grasping at straws here.......

[richappy]

If you can get an airflow meter, check the velocity out of the dryer. You may have something stuck in the dryer, or a dirty lint screen.I use a Dwyer air meter model 460 available on Amazon $37