Irobot Roomba 655 Pet Series Cliff Sensors Replacement Repair Guide

Difficulty

Difficult

Steps

Time Required

                          2 - 3 hours

Sections

Side Brush and Back Panel
2 steps
Battery
2 steps
Front Bumper
2 steps
Front Face Plate
2 steps
Internal Faceplate
1 step
Display
2 steps
Motherboard
3 steps
Cliff Sensors
2 steps

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Introduction

What you need

Step 1

              Removing the Side Brush

Flip the device over onto its back.
Find the side brush, and unscrew the single screw that connects to brush motor by using the Phillips head #2 screwdriver.
This screw doesn’t completely come out of the yellow side brush.

Flip the device over onto its back.

Find the side brush, and unscrew the single screw that connects to brush motor by using the Phillips head #2 screwdriver.

This screw doesn’t completely come out of the yellow side brush.

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Step 2

              Removing the Back Panel

Using a Phillips #1 screwdriver, remove the four screws on the back panel.
Once the screws are loose gently pry the back plate away from the body by using the spudger tool.
The screws don’t completely come out of the panel, but it will still come apart once unscrewed.

Using a Phillips #1 screwdriver, remove the four screws on the back panel.

Once the screws are loose gently pry the back plate away from the body by using the spudger tool.

The screws don’t completely come out of the panel, but it will still come apart once unscrewed.

Step 3

              Removing the Battery

Grab the two pieces of green tape with your thumb and index finger
Pull up on the battery in an upwards direction to remove it

Grab the two pieces of green tape with your thumb and index finger

Pull up on the battery in an upwards direction to remove it

Step 4

              Battery Contact Points

These are the contact points on the Roomba for the battery
These are the contact points on the battery
If these contact points are dirty, they can be cleaned with a moist microfiber cloth (distilled water recommended)

These are the contact points on the Roomba for the battery

These are the contact points on the battery

If these contact points are dirty, they can be cleaned with a moist microfiber cloth (distilled water recommended)

Step 5

              Front Bumper

Remove the ten 11mm screws that hold the front bumper to the plastic bumper protector with your Phillips #1 screwdriver.
Pull the plastic bumper protector up and off of the bumper.

Remove the ten 11mm screws that hold the front bumper to the plastic bumper protector with your Phillips #1 screwdriver.

Pull the plastic bumper protector up and off of the bumper.

Step 6

Flip the Roomba back over, so you are viewing the top.
Pull up on the front bumper to remove it.
Be careful not to pull too hard because there is wiring attached to the bumper.
Remove the two 7mm screws with your Phillips #1 screwdriver, holding the wire sensors in place to the front bumper.

Flip the Roomba back over, so you are viewing the top.

Pull up on the front bumper to remove it.

Be careful not to pull too hard because there is wiring attached to the bumper.

Remove the two 7mm screws with your Phillips #1 screwdriver, holding the wire sensors in place to the front bumper.

Step 7

              Front Face Plate

Remove the dust bin by pushing on the button for the dust bin removal
Pull the dust bin out

Remove the dust bin by pushing on the button for the dust bin removal

Pull the dust bin out

Step 8

Pull up on the silver handle to release the top protectant plastic
Remove the top plastic carefully

Pull up on the silver handle to release the top protectant plastic

Remove the top plastic carefully

Step 9

              Internal Faceplate

The outside six - 10mm screws and the inside set of four - 10mm screws are the same here, use your Phillips head #2 to remove them
Use your Phillips head #0 to remove the one - 7mm bottom center screw
Use your Phillips head #2 to remove the two - 8mm screws by the handle
Push down the two release points to pull the plastic piece up
Pull the plastic piece up

The outside six - 10mm screws and the inside set of four - 10mm screws are the same here, use your Phillips head #2 to remove them

Use your Phillips head #0 to remove the one - 7mm bottom center screw

Use your Phillips head #2 to remove the two - 8mm screws by the handle

Push down the two release points to pull the plastic piece up

Pull the plastic piece up

Step 10

              Display

Pull the silver tab, and clear tinted display off
Remove the 4 - 9mm screws holding the display with your Phillips head #0

Pull the silver tab, and clear tinted display off

Remove the 4 - 9mm screws holding the display with your Phillips head #0

Step 11

Remove the display
Remove the plastic protectant film from the motherboard

Remove the display

Remove the plastic protectant film from the motherboard

Step 12

              Removing the Motherboard

Remove the five - 8mm screws with your Phillips head #1, holding the mother board in place to the Roomba
Pull the mother board up off the Roomba
Be careful not to pull hard because there are a lot of wires attached to the motherboard

Remove the five - 8mm screws with your Phillips head #1, holding the mother board in place to the Roomba

Pull the mother board up off the Roomba

Be careful not to pull hard because there are a lot of wires attached to the motherboard

Step 13

              Unclipping the Wires

Remove the three sets of wires plugged into the back of the motherboard
Some of these can be difficult to remove, and you may need the help of the metal spudger

Remove the three sets of wires plugged into the back of the motherboard

Some of these can be difficult to remove, and you may need the help of the metal spudger

Step 14

              Unclip the Cliff Sensor Wires

Flip the motherboard over
Remove the five wire connections using the same method as the previous two
Lastly, remove the bumper sensor wires from the motherboard

Flip the motherboard over

Remove the five wire connections using the same method as the previous two

Lastly, remove the bumper sensor wires from the motherboard

Step 15

              Cliff Sensors

Insert metal spudger between cliff sensor and body of Roomba and push down and away from yourself
After releasing the snap lock slide the cliff sensor down to free it from its place
Repeat for the other cliff sensors

Insert metal spudger between cliff sensor and body of Roomba and push down and away from yourself

After releasing the snap lock slide the cliff sensor down to free it from its place

Repeat for the other cliff sensors

Step 16

Here are two pictures that should show what your Roomba fully disassembled looks like

Here are two pictures that should show what your Roomba fully disassembled looks like

To reassemble your device, follow these instructions in reverse order.

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                                                                                      17 other people completed this guide.

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                                      with 4 other contributors

                    Rhett

Member since: 01/22/2015

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Team

                       Cal Poly, Team 21-20, Maness Winter 2015                        

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                                            14 Guides authored

florinabeakovic23 - Jul 3, 2015

Thank you very much for this useful guide. I cleaned properly my cliff sensors and all the Robot with the air compressor. Now it works properly and it looks like new!

Maria Christiansen - Mar 18, 2018

Very complete instructions! Thank you so, so much! There were a few points along the line that I thought I was going to break something but trusted your instructions and everything worked out perfectly! I actually didn’t replace my Cliff sensors but took them apart as somehow they had gotten dirt inside of them. My floors are finally clean again and you saved me between 300 + $400!

junhita - May 8, 2018

Thank you. My roomba was stopping every 5 minutes or so with the “move to a new location” error message. I took it apart following this tutorial and opened the cliff sensors to clean inside of them (with a q-tip dipped in alcohol). After putting everything back together my old roomba is working perfectly again! Thanks for the detailed instructions! The color coded pictures with the screws was most helpful!

Jodie Wollman - Apr 18, 2020

My intention of needing this video was to disable the cliff sensors on my Roomba 980, so it would vacuum a black-background rug. This was “my bad” but I misunderstood these instructions and thought I only needed to remove the bumper and two screws in order to remove/disable the cliff sensors!! I initially did not realize I needed to go through all of the steps to do this. I am thankful that is ALL I did, as I am not anywhere near the level of proficiency of taking the Roomba apart as these instructions provide. Now that the Roomba 980 is back together, I found another video that exactly suited my purpose in case it will help anyone else — Here’s the link : https://www.youtube.com/watch?v=h8fZLDuQ….

Cheryl - Oct 22, 2020

Thank you for putting this guide together. I have two roomba 655’s and they are getting old. They are starting to have problems. I’ve bought newer models but they just don’t work as well for pet hair. With your instructions I’ll be able to extend the life of the two I have. Thank you

Introduction#

What you need#

Team#

Introduction

What you need

Team