The handle for my Eureka 5893 AVZ was getting very hot. Finally, the wires around the switch melted and the vacuum will not work. What is wrong? Is the switch bad? Nothing else appears to be wrong.

Well documented issue, overheating, melted cheap wiring, cheap burned out switches made in China, a Dyson, it is not!

Had exactly the same problem with my upright Eureka Model 5893 bagless. Eventually, the handle would get hot, and finally it just quit. When handle was disassembled, the wires were melted and it was toast. Ordered a switch after talking to several repair men. Talked to Eureka, too, and they were absolutely no help. Cheap wiring and switch made in China. Good luck trying to find a switch. vacuum-depot.com has switches, so you might try there, but make sure you get the 3-prong switch (same switch used on Eureka's Genesis). It is Part #27871.

And lots more

https://www.google.com/search?q=Eureka+vacuum+model%232961+Won%27t+start

Had exactly the same problem with my upright Eureka Model 5893 bagless. Eventually, the handle would get hot, and finally it just quit. When handle was disassembled, the wires were melted and it was toast. Ordered a switch after talking to several repair men. Talked to Eureka, too, and they were absolutely no help. Cheap wiring and switch made in China. Good luck trying to find a switch. vacuum-depot.com has switches, so you might try there, but make sure you get the 3-prong switch (same switch used on Eureka's Genesis). It is Part #27871.

try cleaning all...
if have sam paoblem need replaced main motor....

If you got the handle apart, Id say you can probably fix it yourself. You might be able to patch it but I would say to maximize your effortrs please visit RepairClinic.com to find the exact replacement parts you need. They also have expert advice and guidance available.

I hope this works for you.

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i have a 1998 chrysler sebring convertible stop starting by the ignition switch,we changed starter,ignition switch been changed,changed starter relay,trace the wire haven't found a broke are burned place in it,checked igniton fuse its good,didn't see a linkable fuse

Had exactly the same problem with my upright Eureka Model 5893 bagless. Eventually, the handle would get hot, and finally it just quit. When handle was disassembled, the wires were melted and it was toast. Ordered a switch after talking to several repair men. Talked to Eureka, too, and they were absolutely no help. Cheap wiring and switch made in China. Good luck trying to find a switch. vacuum-depot.com has switches, so you might try there, but make sure you get the 3-prong switch (same switch used on Eureka's Genesis). It is Part #27871.

The wires leading to the switch inside my Eureka 4870 are fried...black and melted. Don't know why that happened, but it may be what is happening to the others listed on this site as well.

I have the same vacuum and the on/off switch wasn't working any longer so I took the cover off to find out that the wiring got so hot that it melted through the wire coating and plastic frame.

Had exactly the same problem with my upright Eureka Model 5893 bagless. Eventually, the handle would get hot, and finally it just quit. When handle was disassembled, the wires were melted and it was toast. Ordered a switch after talking to several repair men. Talked to Eureka, too, and they were absolutely no help. Cheap wiring and switch made in China. Good luck trying to find a switch. vacuum-depot.com has switches, so you might try there, but make sure you get the 3-prong switch (same switch used on Eureka's Genesis. It is Part #27871.

COUNT ME IN ON A CLASS ACTION IF ANYONE KNOWS A GOOD LAWYER.
Here's my story, posted on other solutions here, especially on the Model 5893; many people with burned wiring and switches. Major fire hazard imo! Okay, here's the skinny on my upright Eureka POS vacuum:
Had a problem with my upright Eureka Model 5893 bagless kinda starting and stopping. Eventually, the handle would get hot, and finally it just quit. When handle was disassembled, the wires were melted and it was toast. Ordered a switch after talking to several repair men. Talked to Eureka, too, and they were absolutely no help. Cheap wiring and switch made in China. Good luck trying to find a switch. vacuum-depot.com has switches, so you might try there, but make sure you get the 3-prong switch (same switch used on Eureka's Genesis). It is Part #27871.