Vacuum plugs getting so hot they’re warping/melting! **HELP**

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aeruslux99

Member
Joined
Mar 19, 2024
Messages
7
Location
New Brunswick, Canada
Hi guys. I have 7 vacuums, 4 are Dirt Devil. I need to preface by saying Dirt Devil since those are the only vacuums I’m having the issue with. Two models in particular…

The issue is with the newest model bagged Dirt Devil FeatherLite’s, right before they were discontinued in the mid-2010’s. One is a 2009 model in black & one is a 2012 model in red. Both are bypass-air as all Dirt Devil uprights had been bypass-air for some time starting around 2005/6…

Anyways onto the issue. Most vacuums I’ve had, if you run them long enough, the cords & plugs will get warm. But only warm. Not hot. This has happened at a brand new house I lived in, houses built in the 70’s, etc. so I don’t think the wiring or fuse boxes have anything to do with the issues. The current house I’m living in was built in 1994 & having the house fully inspected before I moved in by an electrician, again I highly doubt a wiring issue.

The problem is when I run these vacuums (bypass air bagged FeatherLite’s) if I'm doing multiple rooms, regardless of using on bare floor or carpeting, the plugs will get so hot by about 15 minutes of use that the plastic part of the plugs are actually able to be stretched around like rubber in your hands as they’re THAT HOT. So I find myself always giving the vacuums 5-10 minute breaks with large cleaning jobs which gets annoying. I rarely vacuum the entire house for hours or do a “deep clean” but sometimes it must be done.

I’ll also note that these vacuums are pretty much brand new. This has also happened at more than one outlet, on more than one circuit. I’ve only used them maybe 10 times each so far, and this happens almost every time. Both were sold to me new-in-box. The black model had been sitting in an old man’s basement unused in the box until the family was cleaning & sold it.
I know these Dirt Devil FeatherLite’s have 12 AMP motors but the only conclusion I can come to is that they, for some reason, are drawing more than 12 amps. I know they sometimes struggle on carpets because of the non-existent height adjustment. So the motor works harder then. But on bare floors, the plugs still get crazy hot after 15-20 minutes.

The part that’s even more concerning to me is that the heavy-duty extension cord I use to plug into the wall so that I can go farther without having to keep unplugging & re-plugging the vacuum cord, is getting just as melting hot as the vacuum plug itself on the end where the vacuum cord plugs into the extension. The wall outlet also gets quite hot but not nearly as hot as the plugs.

What makes this so odd is that my sage-green direct-air Dirt Devil FeatherLite (also 12 AMPS) doesn’t get nearly this hot, under any circumstances. And the plug appears to be exactly the same type used on the other newer models. It’s only the newer bypass-air models that have this overheating at the plug issue. My Aerus/Electrolux vacuums don’t do this, they do get warm at the plug, but nothing alarming, and the canister is 11.5 AMPS I believe.

So my question is, why would they be doing this? Are they drawing more power than they should be as I suspect? & why? Is the load too much for the OEM cords? Would cutting off the original plugs & re-wiring them with heavy-duty hard plastic plugs possibly solve the problem?
To clarify I have checked for clogs, bad brush-roll bearings, etc. & nothing is adding extra strain to the motors.
All the old FeatherLite uprights do naturally work a bit harder on carpeting due to the lack of height adjustment but as I said, the overheating is an issue on both carpet & bare floors. Maybe it heats up faster on carpets but either way, my earlier model sage green direct-air FeatherLite has the same slight struggle on certain carpeting but does not get the plug anywhere near as hot as these otherwise identical models, even after several minutes of use on carpet. I can’t for the life of me understand why the bypass-air models would be generating this much extra heat at the plug, when they’re 12 AMP just like the older sage green model. Possibly bypass-air vacuum motors require more power than direct-air? If you didn’t look closely at the hoses, you wouldn’t even know they were any different aside from one being black & one being green! But the overheating issue certainly is exclusive to my bypass-air’s. Both the black 2009 model & the red 2012 model. Exact same motors on both. IMG_1941.jpeg
 
The vacuums have to be drawing more than 12 amps to get the outlet and extension cord as hot as you describe. If it was just the vacuum cord getting hot I would be tempted to write it off to an inadequately speced cord by a cost cutting manufacturer. But if you are also overheating an extension cord, assuming it is rated for 15 amps because you say it is heavy duty and not a 10 amp cord, I have to suspect the vacuum itself is pulling too many amps. Strange it doesn't trip the breaker though. I am trying to think how you can get a volt-ohm meter between the wall outlet and plug to measure the current draw while the vacuum is running.
 
Obtw, I think you mean these newer Dirt Devil's have through flow motors. Bypass motors are what you find on shop vacs or carpet shampooers. The suction air is either blown out ports on the upper fan housing, peripheral bypass, or like you see on central vacuums the suction air is expelled out a big round hole on the side, called tangential bypass. The salient feature is suction air never touches the electrical parts. They have a separate cooling fan on top. A through flow motor, what is in pretty much all "Clean Air" uprights blows the suction air through the motor to cool it. Acceptable as long as the air is dry and filtered.
 
Well, I found an old review page for the black model (M085570) with two people stating that their plugs caught on fire *clenched teeth*… so maybe there should have been a recall on these vacuums.
I know the motors in all hard-shell bagged Dirt Devil FeatherLite’s (1999-2015?) like to spark out rather dramatically if people continue to use them with bad motor bearings or if something jams the brush roll & isn’t removed promptly. Never had it happen to one of mine as I’ve always taken good care of them though.
However I was unaware the plugs themselves could start a fire under normal use. Up until now I’ve only had the older direct/dirty-air models & the plugs don’t heat up like that.
Both reviews I read for the black model say the plugs sparked & were “melted”. One saying it ruined the entire outlet. Couldn’t find any reviews for the red model but since it has the same motor, I’m assuming it’s happened to people with that model as well. I think I’ll be cutting the OEM plugs off & re-wiring them to a heavy-duty 15 AMP plug. Or something.
& yes thats what I meant. I had always heard people refer to them as “bypass air” or “clean air”. The design is superior for reducing risk of fan damage but in this case, it seems Dirt Devil replaced risk of a shattered fan with risk of electrical fire.
 
Well, I found an old review page for the black model (M085570) with two people stating that their plugs caught on fire *clenched teeth*… so maybe there should have been a recall on these vacuums.
I know the motors in all hard-shell bagged Dirt Devil FeatherLite’s (1999-2015?) like to spark out rather dramatically if people continue to use them with bad motor bearings or if something jams the brush roll & isn’t removed promptly. Never had it happen to one of mine as I’ve always taken good care of them though.
However I was unaware the plugs themselves could start a fire under normal use. Up until now I’ve only had the older direct/dirty-air models & the plugs don’t heat up like that.
Both reviews I read for the black model say the plugs sparked & were “melted”. One saying it ruined the entire outlet. Couldn’t find any reviews for the red model but since it has the same motor, I’m assuming it’s happened to people with that model as well. I think I’ll be cutting the OEM plugs off & re-wiring them to a heavy-duty 15 AMP plug. Or something.
& yes thats what I meant. I had always heard people refer to them as “bypass air” or “clean air”. The design is superior for reducing risk of fan damage but in this case, it seems Dirt Devil replaced risk of a shattered fan with risk of electrical fire.
I would investigate a way to measure the amp draw of these vacuums before wasting money on a new cord. They might just be pulling too many amps. The reason I say that it the vacuum heated up your heavy duty extension cord. That tends to indicate it is pulling a lot of amps. There are plug in amp meters at Walmart for around $12. You plug the meter into the outlet and then plug your appliance into the meter.

https://www.walmart.com/ip/HBN-Elec...UUos9qpT7gW9dpBH8LLIncF5ewBBbXahoCleQQAvD_BwE
 
I guess nobody on here is electricians? You mentioned you are using an extension cord. Stop doing that. That is the source of your problem. You are exceeding the power limits of the extension cord and drawing more power than it is rated for. You are creating your own fire hazard.

You never use a vacuum cleaner on an extension cord to begin with. You plug the vacuum in to each room you are working in, that is how you use a vacuum cleaner and how everyone has used them for over 100 years. There is no need for this nonsense.
 
I guess nobody on here is electricians? You mentioned you are using an extension cord. Stop doing that. That is the source of your problem. You are exceeding the power limits of the extension cord and drawing more power than it is rated for. You are creating your own fire hazard.

You never use a vacuum cleaner on an extension cord to begin with. You plug the vacuum in to each room you are working in, that is how you use a vacuum cleaner and how everyone has used them for over 100 years. There is no need for this nonsense.
No. That's not true. You should be able to safely plug any 12 amp power tool into a properly rated extension cord plugged into a 15 amp outlet. Contractors plug big concrete saws and compressors into extension cords and run these to a generator or to an outlet on the side of the house.

I use an 11.5 amp vacuum on a 50 foot long extension cord all the time to clean cars in our driveway. The cord on the vacuum isn't even close to being long enough to reach an outlet in the garage. Neither the extension cord nor the vacuum's own cord ever get hot. At our offices the custodial crew always runs their Windsors on extension cords because we don't have nearly enough outlets in our cubicles ( there is kind of a built in power strip for your computer and monitors and that's it ) and there aren't may outlets on the walls of the office space. So they have to use long extension cords.
 
Hi:
The plug getting very hot may be due to a less than ideal connection of the plug prongs into the wall socket. The plug should fit very snugly. And the plug prongs should be clean and slightly shiny. The prongs can be cleaned up with light sandpaper or a 3M green abrasive scouring pad.

If the above is not the fault, then I would replace the plug with a type whereas the bare wires from the cord wrap around screws to insure a good connection. It is possible that the wires inside the present plug are loose and not making a good connection inside the plug. Might be the result of a faulty proceess when it was manufactured or damage caused by pulling the cord from the wall socket instead of gripping the plug itself to remove from the socket.

Also, the copper wire inside the vacuum cord should be at least size #16. Nowadays cords are marked with English (AWG) and Metric sizes. Inspect for markings on the vacuum cord. Look carefully as often the markings are quite faint. So for #16 size you should see AWG 16 and 1.5mm2 (the 2 will be smaller and raised to indicate "squared". If you see #18 and 0.075mm2, the wire size is insufficient as it is rated for 10 amps (1200 watts) at the max.

What does the vacuum nameplate specify in terms of amperes (Amps) or watts? #16 wire is rated for a maximum of 12 amps or approx. 1440 watts) while a larger wire #14 is good for 15 amps or 1800 watts.

So check the above to see if anyof the suggestions steps will reveal the fault. Your situation is a hazard that must be remedied. If your home is wired for a desired 20 amperage rating, then the circuit breaker would not trip unless the current draw exceeds 20 amps or 2400 watts, so if the vacuum is using more than what is shown on the nameplate, but less that the circuit breaker rating, it will not trip.

A partially shorted motor in the vacuum cleaner will cause it to draw more amps that that on nameplate. Is there any "burning odor from the vacuum?

A $12.00 wattmeter from Walmart would be a good investment. Here is a link: https://www.walmart.com/ip/HBN-Elec...RRiZN6puBf01aqGyjeJbugOX8nMqGGvxoCZMwQAvD_BwE

A preferred size extension cord is #14 but they are more costly than the more common #16, so more #16 are sold and used. The #16 cord may not always overheat, but there is a loss of power along its length so the device being used may run at less than optimal deign.

#12 extension cord is often required for devices that use between 15 and 20 amps, but most homeowners will get along with a #14 size very well.

Again do not fail to resolve the cord or plug overheating fault. Please inspect the vacuum nameplate and post your findings on this Forum thread. Let us know about the plug and wall socket as outlined above. And purchase the Walmart wattmeter to resovle the fault.

Ron Reeland
 

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