Brand new Kenmore washing has burning plastic smell
We are on our third washing machine in one week. The last one was completely ruined upon delivery - from ApplianceSmart. Needed new transmission, stuff was jammed, apparently dropped, etc. We returned it and went to Sears to buy a Kenmore.
They delivered and installed it today, and I am again smelling that burning or hot plastic smell when the cycle goes from rinse to spin.
How can the same thing be happening to a brand new washer the day I get it? This is my third washing machine in one week that hasn't worked from the start......
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We had this same issue. I noticed it smells like burning plastic. I took it apart and did not find any fundamental problems. Ball bearings on motor are fine, no play.
What I did find was that the motor construction contains lots of plastic. It's made in China. Even the brush holder is plastic. Now, this is unusual to me, as brushes get very hot. However, I did not find any issues of melted or softening plastic when running. I used a laser-guided thermometer and measured about 170 degrees F on the metal portion of the brush holder. Nothing unusual. Some parts reached above 200 degrees F. Again, nothing unusual. The only unusual issue is that many of the parts are mated with plastic parts. That's where I believe the problem lies.
When the motor is new, the brushes don't make full contact. Therefore, full power draw is not achieve until these brushes wear down a bit. After this point, the brushes reach maximum power delivery and reach maximum temperatures. This is why I believe the vacuum didn't exibit any smell until a few months later, at least, for us.
In conclusion, I didn't find anything wrong, except that the motor is cheaply constructed. It isn't going bad and well likely last quite a while, IMHO.
Considering the info you`ve provided, specific to the history of replacing the drive coupling. You stated that right after replacing the coupling it started to smoke or as you said "I started to smell a burning smell". Can you identify if it was electrical, or was it rubber/plastic ?
I`ve seen these coupling`s when not put on correctly start to rub against the motor or the transmission, you might want to double check your work with installing the coupling.
Aside from that it could possibly be the motor, but if it agitates and manages to advance through the wash & rinse cycle up to the spin, I`d be skeptical of a motor problem. You should check to make sure the lid switch is being fully closed, in the event it isn`t closed properly the unit will do everything except spin.
Go to the sub section with the brake/clutch/motor/gearcase and item # 13 is the motor coupler between the motor and transmission.
It has three parts. 1. A plastic piece with three prongs fits on the transmission input shaft. 2. A plastic piece with three prongs fits on the motor output shaft and 2. a RUBBER grommet with 6 holes fits between them.
Over time, the rubber piece can wear and the two plastic pieces can rub against it at speed causing a rubber burning smell.
Replacing one is easy.
Remove the cabinet, the pump (2 clips) the motor (two screws and clips) and the motor mounting bracket (two 1/2: bolts).
Remove the rubber piece and pry off the two plastic pieces. Fit the new plastic pieces on the transmission and motor shafts. Replace the mounting plate. Carefully line up the six holes as you put the motor back on.
Replace the motor mounting clips, the pump and clips and cabinet.
i would let it sit for an hour. more than likley what happened was the motor overheated a little because it was trying to spin in an off balance situation. give it a break for a while the next load that you do keep an eye on it and see if you smell anything if you do then you have a problem. But 99% it is ok.
it sounds like he did not install the new coupler correctly. if it is not installed correctly it will rub on itself and burn some of the rubber. it will also make the part fail sooner. the part looks like this.
the rubber piece between the 2 plastic pieces is what is being pinched. the "professional" should redo the job. the coupler only costs him about $5.00 and it only takes 10 minutes to change.