Every time I run the sweeper there is a funny smell, like hot plastic, too much friction somewhere. The smell leaves you thinking that something isn't right-you better stop the sweeper and check it out.
At one point we thought there seemed to be a suction problem, we checked the hoses, took off the floor metal part & took out the beater bar and cut off the yuk swirled around it (hair, thread, etc).Did NOT identify "THE PROBLEM" but the suction was fine. I think the smell may have been there before that, but definitely after that. The filter in the center of the canister and the HEPA filter a clean. The beater bar works fine.
Thanks for any help!!
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If you can notice a smell of burned rubber near the sweeper, then you most likely have a slightly stretched belt. The belt would be spinning against the beater brush, causing the squeaking noise -- as it heats up, the belt will begin to smoke, or at least give off the smell of burned rubber. This will be the most noticeable if you use the vacuum for a few minutes and then turn it off -- most times the suction from the vacuum will pull the smell into the vacuum and keep you from noticing it until it has been going on for quite some time. Replacing the belt should fix the problem.
Before going out and buying the belt, you might want to check between the belt and the beater brush -- if there is a lot of debris between the belt and the beater brush, it will cause the same type of slipping as a stretched belt, and could also be the cause of your problem. Either way, to fix the issue, you have to open the bottom of the vacuum and take a look at the belt -- if it looks to be in good shape, move it around a little. If it has a lot of room to move, it's probably stretched. If you notice a big hair clog under the belt, this is most likely to be your problem -- clean that out and you should be good to go.
What does the smell seem to be? If rubber, check the belt and brushroll for free rotation. If a musty smell, check the bag, it may need replaced with a new paper bag. If it has an electrical smell, like hot insulation, then the motor needs checked.
The belt looses it tensile strength (tightness) over time. But it's the part about funny sounds and shutting down that concerns me. If it smells like a tire fire then it's the belt if it smells like plastic and burned hair then the motor has a bad field or armature. Probably one of the carbon brushes got hung up and burned a segment in the armature.
Unlock the sweeper brushes and take them out. on each end is a cup bearing and should be free of debris. then check around and under the belt and likely there is debris wrapped around it. the post is getting hot as your pulling too much of a load. though if it continues the motor may have a bad set of motor brushes (inside the motor) or bad wiring (kinda unlikely).