Ecovacs Deebot N79 and N79S – Red Light and Four Beeps Error

We own a total of three Ecovacs Deebot N79 / N79S robot vacuum cleaners and we use them daily at When Hounds Fly.

As a dog training school, upwards of 30 different dogs may come per day for classes. It’s a LOT of fur and dander and lint and sand and dust!

Despite this, our N79s were giving us great service for many months until suddenly they all started giving the “Red Auto Light / Four Beep” error.

They would run for about 2 minutes and suddenly stop dead in its tracks and give off the error.

Initially our research showed it was a battery issue. So, we spend weeks playing with charging dock positions, cleaning the charge contacts, etc. and nothing seemed to stick.

After a while I had a guess that it was due to hair/fur accumulation in the beater brush and after giving it a thorough cleaning, I was really happy to see the robots perform again good as new.

All it takes is removal of four tiny phillips screws (Update on 6/20/2019 – You don’t actually have to unscrew the clean that piece, it’s not critical), and a flathead screw driver to help with removing the front wheel. I shot a video of me cleaning one of our Deebot N79 vacuums for you to see.

Hope this helps and keeps your Deebot working for many years to come and out of the landfill!

*Update on 6/20/2019* – One of our three Deebots actually stopped working, even after thorough cleaning. I logged a ticket with Ecovacs support and after going through some basic troubleshooting, they authorized me to send it back for a warranty replacement. But, before going through that hassle, honestly, just try thoroughly cleaning your Deebot and you may be surprised!*

15 Replies to “Ecovacs Deebot N79 and N79S – Red Light and Four Beeps Error”

  1. Thanks so much for this video. The four beeps were driving me nuts. I had cleaned the brushes as well as I could from the bottom. I had no idea the screws meant “user serviceable.” this was nine glorious minutes of enlightenment.

  2. hi I have a deebot to and suddenly it’s doing the same thing. I can actually remove the central brush without removing the plastic cover. It just pops. I clean the brush emptied out the lint trap clean the side brushes. And it still gives me the error.

    1. I just took the Deebot apart for this exactt reason. Cleaned the brush assembly (didn’t see a reason to take those 4 small screws out as it looks like they are only there to replace the rubber beading if it rots.) Still the same error. THEN .. I removed one of the two rotating brushes and there was a length of Xmas tree tinsel and some dog hairs wrapped around it, slowing it down, obviously. Removed and replaced the second one and cleaned that too. Voila! Working a treat again.

  3. What a generous offering to take the time and do this … both for other dog owners with busy deebots… but also for the planet for keeping these little robots out of the trash. Thank you!

  4. So mine did that. I cleaned it really well and was still getting the error. When I flipped it over I noticed that the main brush was not spinning well. I ordered and replaced the main brush motor. Now it’s good as new?

  5. thanks for video, followed the cleaning as well as cleaning the motor but it did not resume. please update if ecovac charged you for the warranty replacement? mine is under 12 months, from Canada.

  6. Didn’t work for me. There’s actually a twitter thread about this reoccurring issue:

    I contacted customer service, who suggested:
    1. Place the Deebot on the charging dock. Turn Off the main power switch and after 5 seconds, turn it On ( l ) again. Press the auto button. Make sure the blue light is on.
    2. Press and hold down the Auto button until you hear 3 beeps.

    Didn’t work, so then they suggested:
    1. Please unscrew the battery plate that is located underneath your Deebot. (In between the 2 side brushes.)
    2. Completely disconnect the battery from the unit. Leave it disconnected for about 15 minutes.
    3. Inspect the wires and contact for any breakage and buildup.
    4. Please assemble everything together and give your robot a test run.
    5. Relocate the charging station.

    This didn’t work, and because the warranty expired 4 months ago, there’s nothing they can do.

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