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The very latest news and updates for the iRobot Roomba robotic vacuum, the Scooba Robotic Washer and the Dirt Dog workshop sweeper. All discussion and troubleshooting questions go here.
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Re: Roomba 880 melting charging contacts

January 2nd, 2017, 12:53 pm

I'll be happy to post some data. Mine is a 770. Bought last Christmas. Don't know where to find a date code: let me know and I will post.
So why do you think the right hand charging terminal on the unit sinks in as shown on my pics? Does this gap produced by the sinking inward create a hazard when charging? The gap would produce a higher heat area when charging due to the gap I would believe. Have you seen this "sinking" on other units? Don't you believe that the manufacture is responsible for this kind of defect?

Re: Roomba 880 melting charging contacts

January 2nd, 2017, 2:34 pm

Remove the bin. Turn the bot over. See white service tag with black writing. KYN880021409250203333.
KY,JB: Factory
N: New, PRR: Refurbished, look up factory
88: Robot series and sub series
0: IRobot distribution series?
02: Accessories?
14: Year 2014
09: Month September
25: Day
02: Frimware Revision
03333: Unit Number

I think the problem is rare. It has been reported in US that iRobot has replaced units 4 years old with melted contacts. You should contact iRobot. You should get a replacement.
Yes, I think there is/was a manufacturing problem. I am sure their QC is working on it.
I have noticed that on carpeted floors with tack strips, the base tends to lean forward slightly causing a 2014 770 to not dock on occasion.
The integrated home base will be warmer than the separated base and charger.

Re: Roomba 880 melting charging contacts

January 20th, 2017, 9:07 am

I'll piggyback in this thread in order not to bring up an ancient one... I don't have melting contacts issue on my 880 (and did no care procedures apart from thoroughly wiping them with dry microfibre cloth).

While cleaning the 880 today, I accidentally pressed and held the SPOT button for 5+ seconds, while roomba was on.
The display showed up something like PET or PER or similar, anyone knows what it is? I freaked out for a bit :lol: so turned it off immediately.

Re: Roomba 880 melting charging contacts

January 20th, 2017, 10:18 am

fufu wrote:Just wanted to inform you that it wasn't an old software version. It's a configuration issue. If you press the spot key over 5 seconds the word 'ArC' appears on the display. This means the robot moves in circles if it detects much dirt (dirt detection 1). If the word 'PEr' shows up, the robot moves forward and backward (dirt detection 2).

A guy in the German roomba forum posted this information. Would have been good if iRobot had mentioned this in the manual... So I sent my first roomba back for nothing...

Re: Roomba 880 melting charging contacts

January 20th, 2017, 11:31 am

Perfect - thanks! I knew you'd know where to find it. It seems I am able to toggle between modes, same as in version 700 (found http://www.robotreviews.com/chat/viewtopic.php?f=1&t=15241 in the meantime)

Re: Roomba 880 melting charging contacts

March 1st, 2017, 12:02 am

For the first time that I'm aware, I now have one with melting... Ummm... "plastic deformation" on BOTH tabs.

> It's an 880.
> The melting is significant (major deformation) on the usual left hand tab, and very minor (didn't even notice it at first) on the right hand side.


Re: Roomba 880 melting charging contacts

May 2nd, 2017, 6:12 pm

Late to the party, I now have the exact same problem. My Roomba is a three-year old 880. Only the left tab is affected. I am in the US. Google led me to this thread. I am about to contact iRobot.

Re: Roomba 880 melting charging contacts

May 13th, 2017, 3:37 pm

I'm in the same boat as everyone else here. I heard the clicking and did some investigating. I've got the melted contact as well. I'm going to see what iRobot can do on Monday when they open. It's no longer under warranty so worst case scenario is I'm on my own.

Re: Roomba 880 melting charging contacts

May 13th, 2017, 5:19 pm

iRobot support is open 6 days a week just closed on Sunday.

Re: Roomba 880 melting charging contacts

May 19th, 2017, 6:08 pm

I gave them a call and they are going to replace my Roomba and the charging station. Easy day.

Re: Roomba 880 melting charging contacts

July 5th, 2017, 1:36 pm

can I use Roomba 800 880 870 series case with 4 pcs sensors On an irobot roomba 780
Would be to enjoyvideo][/video]

Re: Roomba 880 melting charging contacts

October 16th, 2017, 8:26 pm

I have discovered that what I thought was a dead Roomba is this exact issue. Customer care was closed, so I emailed my pictures and contacted them. I was concerned the warranty was up but saw a previous poster indicate they were replacing units as old as 4 years old. Mine is just a year possibly 2 years old. So hopefully that will be solved. I just hope they solve whatever is causing this so that no house fires occur.

Re: Roomba 880 melting charging contacts

January 18th, 2018, 5:00 am

vic7767 wrote:I an putting out this question to rr members. It seems that the 880 is the first Roomba model with the PSU built into the charging base and it is universal i.e. both for 230-240 vac 50 cycle as well as 110-120 vac 60 cycle. There is no stand alone home base that requires an additional PSU be plugged into it. Could it be something in the new integrated PSU/Home base that needs a redesign instead of the 880 Roomba itself ????

No. I have an Roomba 7xx series and I have the exact same issue. Left contact pad (or right when seen upside down) is displaced into the robot. The 7xx series do not have the integrated PSU in the base, it has a separate brick adapter and a DC jack.

Re: Roomba 880 melting charging contacts

January 7th, 2019, 9:33 pm

Looking at this issue again, and I'm still bemused by the feeling that there is more to it...

But maybe it is that simple that there are some floor types (maybe only when they are new?) or some factor in the home (cleaning material/methods?) that is leading to a deposit of a layer of something (something like a varnish) which may or may not be visible that is causing resistance and heating.

I wonder if wiping the contact surfaces clean with an alcohol wipe each month would prevent this?

Re: Roomba 880 melting charging contacts

January 7th, 2019, 10:57 pm

We’ve had our 880 for 5 years. Very reliable. Little to no change in the height of the contact plates. I have experienced plate wear due to arcing, and do sometimes find it ticking while sitting on the base and have to reposition it.

The spring loaded contacts in the base did fail and ceased to be springy. I was able to fix that by opening it up and epoxying the broken parts.

But no melting thus far, thank goodness.
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