Found a piece of the duplex in the box.don;t know where the part goes.need a diagram of the printer parts

Have you setted up in the printer driver to print on label? the printer will automatically adjust the internal parts for printing on a higher density paper!
If you done it gently remove the Duplexer unit from the behind of the printer and chech for pieces of paper or everything could cause the paper jam!
Hope you found it useful, for futher questions i'm here :)

remove the small, or scratch into pieces inside the duplex to clear the paper jam.

I don't know the final solution but do want to brainstorm with you so you are not alone in the fixing process....

White Westinghouse Dehumidifier - Model Number >>> ????

http://www.searspartsdirect.com/partsdirect/brands-products/White-westinghouse-Parts/Dehumidifier-Parts

Sears is your friend here. They often have blow-up diagrams of how these units work. Just find your model number and look at the parts diagram if you can find it. 9/10 Sears has given me the answer through their online manuals.

Post your answer if you've figured it out.

I found that one of the papers i was trying to print was set for double sided printing, well i don't have the duplex part of it. So I kept getting the error. You have to cancel all the print jobs thru the buttons on the printer. Doing it in your computer did not help and turning off the printer did not help me. So after I cancelled all docs from printing and turned off double sided printing it was fixed.

it`s a factory plug from factory to plug dip stick hole till they install dip stick tube down the line

this will be an issue with the duplex rollers check where it is jamming is it in the duplex unit if yes then check the duplex rollers for wear worn rollers will cause scews also check there is no torn pieces of paper stuck in the guides of the duplex
a good thing to do is to get a thin piece of card stock slide it into the duplex manually and frred it where the paper path goes on the duplex from beginning to end and it will push out any thing in the path

I have not used that specific printer, but from all I can determine, it is not a duplex printer. However hp offers these suggestions on how to determing if your printer is duplex: <br /> "To find out if your printer supports duplex printing, refer to your printer manual or look for the <b>Two-sided (Duplex printing)</b> or <b>Print on both sides</b> drop-down menu in the <b>Printer Properties</b> dialog box on your PC (sometimes found in the <b>Printer Shortcuts</b> tab).<br /> If you can

Don,

Yes, this printer has a duplex option. It is an assembly that mounts under the printer.

However, given the age of the printer, you may not be able to purchase one.

Check the Lexmark website, www.lexmark.com and see if you can purchase the option there. Next best solution is to call the Lexmark Parts Center and see if you can purchase the complete assembly.

Don

The duplex unit is an OPTIONAL component on that printer.

no you have to clean it the sensor, or you have to check the briege unit