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Old 08-11-2016, 11:12 AM   #1
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USB port: Burning smell, hot to touch

The other day there was a burning wire/plastic smell in our 2015 FC 25 (front bedroom with inverter and converter both under the queen bed). I followed my nose, so to speak, and discovered that one of the dual USB ports by the bed was hot to the touch.

I pulled a fuse which I thought powered the USB ports (but didn't) and flipped off the circuit breakers that supply the bedroom lights, etc (which also didn't turn off the USB port). We then flipped the "use/store" button to "store", waited ten seconds, and flipped it back to "use". This took care of the problem and the USB port cooled down in a few minutes to be cold to the touch. By the way, we were plugged into shore power but had flipped off the campground pedestal circuit breaker before bed because our Airstream supplied converter makes a humming noise that bothers me when going to sleep.

I have an appointment with our dealer's service center for Tuesday as we head out on another trip on Thursday but I was curious if anyone had experienced this.

Thanks!
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Old 08-11-2016, 11:15 AM   #2
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Wires too small for the load or load to big for the wires. Usual causes for hot wiring/plugs. ???
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Old 08-11-2016, 11:17 AM   #3
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I haven't experienced the hot USB port problem, but I did have the noisy converter problem until I replaced the original with a Progressive Dynamics (PD4655V) 55 Amp Converter/Charger with Built-In Charge Wizard.

It sounds like replacing yours might resolve a couple of problems.
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Old 08-11-2016, 11:39 AM   #4
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Quote:
Originally Posted by Meeks View Post
The other day there was a burning wire/plastic smell in our 2015 FC 25 (front bedroom with inverter and converter both under the queen bed). I followed my nose, so to speak, and discovered that one of the dual USB ports by the bed was hot to the touch.

I pulled a fuse which I thought powered the USB ports (but didn't) and flipped off the circuit breakers that supply the bedroom lights, etc (which also didn't turn off the USB port). We then flipped the "use/store" button to "store", waited ten seconds, and flipped it back to "use". This took care of the problem and the USB port cooled down in a few minutes to be cold to the touch. By the way, we were plugged into shore power but had flipped off the campground pedestal circuit breaker before bed because our Airstream supplied converter makes a humming noise that bothers me when going to sleep.

I have an appointment with our dealer's service center for Tuesday as we head out on another trip on Thursday but I was curious if anyone had experienced this.

Thanks!
Was anything plugged into the USB ports at the time? Have you ever used the ports, and did they work OK?

If you are interested in knowing more about what went wrong, you can ask the service person to give you the failed unit when they replace it. I don't have USB ports in my trailer, but many people do, so if you can post a picture I'm sure some others here will appreciate it.
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Old 08-12-2016, 07:57 AM   #5
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The USB ports in the twin beds are between the beds on either side of the nightstand pointing towards the beds. In a very short time both dual-ports died from pillows and body parts hitting them while being used for charging phones while sleeping. They started off getting very loose which caused a bad connection which can cause the connector to get hot. I had them replaced by dealer but then ended up changing the entire setup to eliminate future problems.

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Old 08-12-2016, 11:47 AM   #6
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From experience with USB burning:

1. Metal shavings may have gotten into the port.
2. Moisture or water may have gotten into the port.
3. The device you are connecting to it is damage: crossed wired.


USB jacks that you see is like an extension cord to the motherboard or circuit board. Unless you have messed with the connection between the MB and CB (not saying I did that, and crossed the wires) it is very RARE for that to malfunction without external forces. How does an extension cord break? Very rare on its own unless outside forces are acting on it.

Once your USB is toast, the MB and CB are more likely to be toast as well. Get it under warranty if you still have it.
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Old 08-12-2016, 01:01 PM   #7
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I replaced them with Blue Sea Systems USB plugs. It was a perfect fit in the existing hole. These are marine-certified and have a cover over the hole. It also has a very small light to let you know if the socket is energized.

Took me 10 minutes to replace.

You can find these on Amazon.
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Old 08-12-2016, 01:12 PM   #8
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Quote:
Originally Posted by cazual6 View Post
From experience with USB burning:

1. Metal shavings may have gotten into the port.
2. Moisture or water may have gotten into the port.
3. The device you are connecting to it is damage: crossed wired.


USB jacks that you see is like an extension cord to the motherboard or circuit board. Unless you have messed with the connection between the MB and CB (not saying I did that, and crossed the wires) it is very RARE for that to malfunction without external forces. How does an extension cord break? Very rare on its own unless outside forces are acting on it.

Once your USB is toast, the MB and CB are more likely to be toast as well. Get it under warranty if you still have it.
These ports are wired for power only - they do not connect to anything other than power. Like glcmranger said they can be easily replaced - although I am not a fan of a light right next to my head while sleeping. I would agree that the dealer installed ports are piles of poo and if you plan to use them you may want to replace them with something better.
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Old 08-13-2016, 12:09 PM   #9
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Wow, thanks for all of your great replies and ideas! I will check them all out when I drop the trailer to the dealer on Monday morning (and yes, still under warranty for another eight months).

Thank you all so very much!
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Old 06-06-2017, 06:42 PM   #10
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Wow, thanks for all of your great replies and ideas! I will check them all out when I drop the trailer to the dealer on Monday morning (and yes, still under warranty for another eight months).

Thank you all so very much!
I had the same issue yesterday while dry camping. I pulled the fuse for the 12v sockets (USB ports) and Radio/DVD player.

I put the fuse back in this afternoon and everything seems normal on both 12volt and on AC shore power. I plugged my iPhone in both receptacle on the dual USB port next to the DVD/Radio and no heat or smell.

So....I was curious about what your dealer diagnosed with you trailer.
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Old 06-12-2017, 01:17 PM   #11
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I had the same issue yesterday while dry camping. I pulled the fuse for the 12v sockets (USB ports) and Radio/DVD player.

I put the fuse back in this afternoon and everything seems normal on both 12volt and on AC shore power. I plugged my iPhone in both receptacle on the dual USB port next to the DVD/Radio and no heat or smell.

So....I was curious about what your dealer diagnosed with you trailer.

Well, the dealer never found anything amiss, hence, didn't replace the USB ports. I have used them ever since without experiencing the problem again. Same cord, same phone being used in the same port. I reckon' I will never know what the issue was . If it happens again in the future I will simply replace the ports as others have suggested.

Good luck!
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Old 06-12-2017, 02:09 PM   #12
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Well, the dealer never found anything amiss, hence, didn't replace the USB ports. I have used them ever since without experiencing the problem again. Same cord, same phone being used in the same port. I reckon' I will never know what the issue was . If it happens again in the future I will simply replace the ports as others have suggested.

Good luck!
Yes....I actually cancelled my dealer appointment. I suspect that it was caused by an iPhone charging at the same time as a Verizon Ranger Cell receiver.

It has been said that the Airstream USB ports are of lower capacity than one would think. I've since charged two iPhones at once without issue. The Verizon receiver may be drawing too much for a dual charge.
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Old 06-12-2017, 02:28 PM   #13
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I replaced them with Blue Sea Systems USB plugs. It was a perfect fit in the existing hole. These are marine-certified and have a cover over the hole. It also has a very small light to let you know if the socket is energized.

Took me 10 minutes to replace.

You can find these on Amazon.
Highly recommended. We use these on our boat.
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Old 06-12-2017, 03:07 PM   #14
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Highly recommended. We use these on our boat.
Curious. How would these perform better than what is in the trailer? Other than for marine use, are they rated differently?
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