The Litter Robot 3 is an incredibly popular automatic cat litter box which automatically detects when a cat has entered and exited, and rotates the main globe to sift and dump the used litter. ... DFI sensor issue. DFI sensor needs replacing; Replacement Guide (H) YELLOW SOLID: Cycling (In use) Working normally; Without rotation DFI …Purchase replacement pinch contact and drawer full indicator (DFI) circuit board assembly for your Litter-Robot 3. ... (DFI) circuit boards for your Litter-Robot 3. Contact Whisker Support if your robot is still under warranty The store will not work correctly in the case when cookies are disabled.Removing the bonnet, flexing/bending back the latches (I discovered I wasn't properly seating the back clasps in-place, this helped a bit with the jerky spinning but failed to avoid the pinch detect fault) Emptied the tray, ensured the bag was installed properly. Emptied the litter entirely and replaced to ensure it's below the fill line.If you get a flashing blue light on your cat box and do not want to spend $80 for a new DFI sensor, then try this fix for $10 in parts. It has ben working fo...Litter Robot 3 infrared Drawer Full Indicator circuit boards and assembly Kit for a blue flashing light issue. ... Purchase replacement infra red Drawer Full Indicator circuit boards and assembly for your Litter-Robot 3. Includes DFI board assembly, ... But it's not,do need a new sensor, I've cleaned it several times.Purchase replacement pinch contacts and drawer full indicator (DFI) circuit boards here, or if your Litter-Robot is under warranty, log in to your …May 20, 2020 · Even if their role is the same, there are some differences between the DFI sensors of these two Litter-Robot models. DFI sensor in Litter-Robot 3 and Litter-Robot 3 Connect: This DFI sensor (Product code in RobotShop catalog: Rb-Ltr-72) has two circuit boards. It is based on an IR light. One circuit board is EMITTER and the other one is DETECTOR. If you get a flashing blue light on your cat box and do not want to spend $80 for a new DFI sensor, then try this fix for $10 in parts. It has ben working fo...So I believe I need to replace the sensors. Here's the thing: on the litter robot e-commerce shop, the only DFI kit available seems to be the Infrared Version. However, support …In this case, the DFI sensor and the 3 sets of pins will need to be replaced so we will send you new ones under the warranty. The following videos will show you how to replace these parts: 1- Shipping address. 2- Phone number. 3- Serial number located on the back of the robot.To reset DFI sensor fault on a Connect Litter Robot please hold Reset button until the blue light blinks quickly. After that, it should come to solid blue light. This should really fix the issue of the DFI. 1 Like. Rutoy21 July 13, 2020, 4:53am 22. @pjutras yes ...Litter-Robot 3 is equipped with infrared emitters and sensors located above the waste drawer that check if the drawer is full each time the globe returns to the Home position. Once a full waste drawer is detected, the unit will indicate it is full with a blue flashing light. Visit our Calibrating OmniSense Laser Sensors guide to learn how to recalibrate your Litter-Robot's DFI sensors. Successful: If your Litter-Robot displays a blue light bar, you've been successful. Unsuccessful: If the calibration fails, the LED display will illuminate a yellow light bar with a red flashing light for five seconds. Then the unit ...LR3 DFI sensor needing replacement? Litter-Robot 3 I'm getting the slow blue alternating with rapid yellow when the reset button is pushed. I've permanently bypassed the pinch …So I believe I need to replace the sensors. Here's the thing: on the litter robot e-commerce shop, the only DFI kit available seems to be the Infrared Version. However, support …Trying to figure out the dfi next. Wish I could get schematics of the robot but even with pinch sensor problem fixed the dfi still fails a lot. I have 10 robots all bought within a month and have had to replace 5 dfi sensors, one of them twice. Plus litter robot sent me a new dfi that had no plug on the end of it so they sent me a new one.Follow the video except that instead of replacing the sensor just take one of the pinch terminals and plug the wires you disconnected into each end of it. Maybe wrap the whole thing in some electrical tape after you are done, then re-assemble. 1. [deleted]If your Litter-Robot 3 is displaying a yellow light flashing quickly, this indicates a cycle has been interrupted by the Anti-Pinch safety feature and you will need to inspect the pinch sensor. Inspect the sensors. The purpose of the pinch sensor is to detect if an object is blocking the waste port during the globe rotation.The pinch sensors are a constant source of annoyance: they corrode and stray litter also makes them malfunction. The DFI sensors (drawer-full optical sensors) are unreliable and need to be replaced for $80 from time to time. My latest set of DFI sensors is a little different so it looks like they've redesigned these, so hopefully these won't ...May 23, 2021 · How to install a replacement DFI Sensor Kit and Pinch Detector Terminals in the Litter-Robot III Open Air. Upgrade your Litter-Robot 3 to Connect to get all the perks of the app with this do-it-yourself installation kit! With a WiFi-enabled Litter-Robot, you can use our app to: View the waste drawer level. Change settings remotely. Receive status notifications. Monitor your cat's litter box usage. Control multiple Whisker robots.Thoroughly clean the DFI sensor lens and the surrounding area with a clean, dry cloth. Sensors may be obstructed by debris or dust, which can cause detection problems. ... Description Litter-Robot 3 Open Air DFI Hardware (v2) Replacement DFI Hardware for your Litter-Robot 3 Compatible with Litter-Robot 3 only The Litter-Robot …The Litter-Robot 3 is equipped with a cat sensor that detects when a cat enters and exits the globe. If a cycle is interrupted or the bonnet is removed, the unit will stop, and the yellow light will flash slowly, about 1x per second. This will also occur if the cat sensor is activated by a cat entering the globe.Hello, I have basically the same problem with my litter robot 3 connect. I have tried everything within the trouble shooting like the person said above, I’ve only had it for 1 week. As well I’ve tried to level out the floor for the sensor. But the main problem I am having is the connect only connected to the app successfully for 3 days. And then any …Discover how to troubleshoot your Litter-Robot 4's Drawer Full Indicator (DFI) sensors on our support page. Click for step-by-step guidance now. The store will not work correctly in the ... Litter-Robot 4 is equipped with OmniSense™ detection that utilizes laser and weight sensor technology to provide real-time litter and waste drawer levels.late answered but here is how i fixed mine, but last time i take out the board to change the Full/empty sensor at the bottom Tray and re-assembly it back and my LR3 indicate the “Home Position Fault”. Turned out i didnt put the Hall effect sensor in the correct position. So make you u put it back like the one in the picture.The laser version only exists on a limited production run in 2020, and when those fail, they replace them with the original IR sensors. Despite my LR3 being out of warranty, they sent me a replacement IR and pinch sensor kit free of charge (this is the first and only time I've needed service).Hi, litter robot 3 connect blue flashing light (fast flashing). Have taken the robot apart a few times, cleaned the sensors. Nothing is working. Ordered June 2022. ... 2- Wipe the DFI sensor’s circuit boards on each side. 3- Install the new bag. 4- Press the “Reset” button on the robot. 5- Reset the level on the app. (For wi-fi model)Hello, I have basically the same problem with my litter robot 3 connect. I have tried everything within the trouble shooting like the person said above, I’ve only had it for 1 week. As well I’ve tried to level out the floor for the sensor. But the main problem I am having is the connect only connected to the app successfully for 3 days. And then any …To reset DFI sensor fault on a Connect Litter Robot please hold Reset button until the blue light blinks quickly. After that, it should come to solid blue light. This should really fix the issue of the DFI. 1 Like. Rutoy21 July 13, 2020, 4:53am 22. @pjutras yes it resets it back to solid but every time now after my unit cycles it continues to ...Discover solutions for Litter-Robot 3's blue light flashing drawer full issue. Visit our support page now for troubleshooting tips and quick fixes. The store will not work correctly in the case when cookies are disabled. ... Cleaning the DFI Sensors. Let’s take a closer look at the DFI sensors. Debris, such as dust or cat fur, can interfere ...LR3 DFI sensor needing replacement? Litter-Robot 3 I'm getting the slow blue alternating with rapid yellow when the reset button is pushed. I've permanently bypassed the pinch …Litter-Robot 3: Litter-Robot 4: Footprint: 24.25″ x 27 ... Additionally, the Robot has integrated a new DFI sensor system, which enables reporting of small changes in the waste drawer’s fullness. In the app, this translates to a percentage-based readout that tells you exactly how full the waste drawer is at any time.Cleaning your Litter-Robot. It's important to deep clean your Litter-Robot every 3-6 months. Over time, small clumps can accumulate within the internal pocket of the globe, which can contribute to weight-related errors. Cleaning or soaking the globe thoroughly every 3-6 months will help prevent any excess weight from accumulating within the globe.The issue that you are having would require replacing the DFI sensor and the 3 sets of pins so you can order the following parts from the following links: RobotShop Europe Litter-Robot 3 Open Air DFI Hardware (v2) Litter-Robot 3 Open Air DFI Hardware (v2) Replacement DFI Hardware for your Litter-Robot 3 Compatible with Litter-Robot 3 ...We are sorry to hear that you are having trouble with your Litter-Robot. To troubleshoot this issue, please follow the steps below: Thoroughly clean the DFI sensor …Hello, I have a problem with Litter Robot 3. It has blue flashing light at the beginning. I have tried everything (cleaning, reset, check dfi sensor and empty drawer) and when I plug back in it stuck at solid yellow light now (yellow light only). None of buttons is worked even the power button. Any help would be appreciatedThe unit will cycle again 15 seconds after your cat has left the globe or 5 seconds after the bonnet is replaced. If your Litter-Robot is not detecting your cat or not cycling, complete the troubleshooting steps in our Litter-Robot 3: Cat not detected guide. If your Litter-Robot is slowly flashing yellow or stuck upside down due to the cat ...How to replace your Litter-Robot's Cat Sensor. Posted on 15/01/2018 by pjutras in Domestic, Pet Care, Litter-Robot, Consumer Robotics. Tags: cat sensor , Litter-Robot , Litter-Robot Open Air , repair , Tutorial. 8318 3 7. Like Share.If it cannot cycle after three attempts, the globe will return to the home position, and the control panel will flash yellow and red or blue and red lights. There are a few things you can do to troubleshoot a jammed Litter-Robot globe: 1. Turn off the unit and unplug it. 2. Remove the bonnet. 3. Remove the globe. 4.LR3 DFI & Pinch Sensor - Preventing Errors? Tips & Tricks. Our family has had our LR3 for two years and are mostly in love with it. However, we've had another set of DFI & Pinch …LR3 DFI sensor replaced, still erroring Litter-Robot 3 Inherited a LR3 (not the connect version), gave it a thorough clean and it worked great for 2 weeks. Then got the error …Also I'd like to mention I have the original litter robot 3 that didn't come with connect. But I did install that a year later. I had issues when I first got mine and I thought it was the dfi sensor but just ended up I had to take out the "key" that's in the back and I think there was a cover that was unnecessary too on the inside.Hi, litter robot 3 connect blue flashing light (fast flashing). Have taken the robot apart a few times, cleaned the sensors. ... 2- Wipe the DFI sensor’s circuit boards on each side. 3- Install the new bag. 4- Press the “Reset” button on the robot. 5- Reset the level on the app.My Litter Robot won’t reset. The blue light is constantly flashing. When reset is pressed the yellow light then flashes. It pinch sensor has been cleaned and they are touching. The DFI sensors have been cleaned. Help!!! …Litter-Robot 3 is made with standard plastics and the liner is made out of PVC. ... Debris may cause the DFI to indicate a full drawer regardless of the waste in the drawer. ... This will ensure that the automated Cat Sensor is ready for your cat's next visit. Purchase Whisker Cleaner Wipes.In this case, the DFI sensor and the 3 sets of pins will need to be replaced so we will send you new ones under the warranty. The following videos will show you how …Litter-Robot Cats Litter Box III 3 Open Air DFI Hardware. by Litter-Robot. Write a review. How customer reviews and ratings work See All Buying Options. 0 total ratings, 0 with reviews ...Hello, I have a problem with Litter Robot 3. It has blue flashing light at the beginning. I have tried everything (cleaning, reset, check dfi sensor and empty drawer) and when I plug back in it stuck at solid yellow light now (yellow light only). None of buttons is worked even the power button. Any help would be appreciatedLitter-Robot 3: Litter-Robot 4: Footprint: 24.25″ x 27 ... Additionally, the Robot has integrated a new DFI sensor system, which enables reporting of small changes in the waste drawer’s fullness. In the app, this translates to a percentage-based readout that tells you exactly how full the waste drawer is at any time.This manual will help you get the most out of your Liter-Robot. We will guide you through the setup process, as well as provide you with useful tips and advice for acclimating your cat to their new automatic, self-cleaning liter box. Whisker exists to make life for pets and pet parents endlessly beter. As the leading innovators in pet tech and ...So one day, out of the blue, the same issue happened with our Open Air III, all 3 lights blinking and nothing works. What happens is that after restart the yellow light stays on for like a couple of minutes, and then all 3 lights start flashing simultaneously. Over the course of next one month we changed: Bonet; Globe; DFI kit; Anti-pinch pins ...Litter robot 3 stops mid cycle. I have had the litter robot air for 2 months and it was working fine but recently it has started to stop every few seconds during cycle. The yellow light flashes and cycle continues after 15 secs but then stops again and again even after the robot is returning to its home position.Hi, litter robot 3 connect blue flashing light (fast flashing). Have taken the robot apart a few times, cleaned the sensors. ... 2- Wipe the DFI sensor’s circuit boards on each side. 3- Install the new bag. 4- Press the “Reset” button on the robot. 5- Reset the level on the app.The Litter-Robot four-part system (base, globe, bonnet, and drawer) was constructed with easy upkeep in mind. Whether you’re deep-cleaning or replacing a part, the simple modular design allows you to readily access and service your Litter-Robot. We also offer Litter-Robot repair services even after the WhiskerCare™ Warranty expires—just ...Hello @Mariagav , Thank you for your reply. According to your order number, the robot is no longer under warranty. If the cleaning of the DFI sensor didn’t fix the issue, we recommend replacing it so you can order a new one from this link: We also recommend replacing the 3 sets of pins so you can order new ones from these links: The following …Litter-Robot 3 is made with standard plastics and the liner is made out of PVC. ... Debris may cause the DFI to indicate a full drawer regardless of the waste in the drawer. ... This will ensure that the automated Cat Sensor is ready for your cat's next visit. Purchase Whisker Cleaner Wipes.Hi! I’ve installed a new DFI sensor and circuit-board for the Litter Robot 3 to upgrade to Litter Robot 3 Connect as the DFI sensor on our LR3 had gone faulty and was no longer reporting an accurate level in the waste drawer. On re-assembling the unit, the orange light is flashing slowly, about once per second. I’ve checked that this is not …May 23, 2021 · How to install a replacement DFI Sensor Kit and Pinch Detector Terminals in the Litter-Robot III Open Air. Note: This problem is EXACTLY the same as this other post I found, which is why I’ve essentially just copied the description from there: Litter Robot Cannot Find Dump Position. Hardware concerned: Litter Robot III Connect. Software concerned: N/A. Troubleshooting steps already taken: unplugging it and plugging it in again; cleaning the …Hi all, I'm having an issue with my 1 year old litter robot 3 where after every use the app says drawer full and the blue light flashes. I've followed all the litter robot troubleshooting steps including cleaning the lense and re-calibrating the sensor. I've created two support tickets and have been waiting over two weeks for a response from ...DFI Boards to the Base. 3 Figure 10 Figure 12 Figure 9 Figure 11 Figure 13. INSTALL NEW DFI BOARD ASSEMBLY 15. On the front edge of the opening, free the gray ... 1-877-250-7729 or [email protected] LR3-8051-0a. Title: LR3-8051-0a_gr - Installation Guide - DFI.indd Author: mhannaName of Rule: Litter Robot Flash on Alarm. Comments: I quickly tired of getting notifications on my iPhone and iPad that the Litter Robot's Litter Drawer was full (you have 3 cycles after DFI is triggered to empty the drawer, and my cats can only poop so fast). While thinking of a solution, I realized that there was a bigger problem, namely ...Note: This problem is EXACTLY the same as this other post I found, which is why I’ve essentially just copied the description from there: Litter Robot Cannot Find Dump Position. Hardware concerned: Litter Robot III Connect. Software concerned: N/A. Troubleshooting steps already taken: unplugging it and plugging it in again; cleaning the …Purchase replacement pinch contact and drawer full indicator (DFI) circuit board assembly for your Litter-Robot 3. ... (DFI) circuit boards for your Litter-Robot 3. Contact Whisker Support if your robot is still under warranty The store will not work correctly in the case when cookies are disabled.Litter Robot 3 not reversing during cycle. My Litter Robot 3 has been having a weird issue for the last two weeks. When it cycles, the globe rotates counter-clockwise until the hall sensor detects the magnet on the globe. It then stops, like it should. Then it's supposed to rotable clockwise to return to its home position, when the hall sensor ...With both options, you will get an additional warranty, just in case! -Base Replacement: This is a $399 replacement and gets you a new Litter-Robot base with a 1-year warranty. If your unit was purchased after Jan 1, 2020, you are eligible for a 50% discount on a replacement base at $199.50.The Litter-Robot 3 is equipped with infrared emitters and sensors, called DFI sensors, located above the Waste Drawer that check if the drawer is full each time the Globe returns to the Home position. In the event you need to replace your DFI sensors, please follow these instructions. Kit includes: Drawer Full Indicator board assembly (2) retainersApr 19, 2021 · r/litterrobot • 3 yr. ago DRob433 LR3 DFI & Pinch Sensor - Preventing Errors? Tips & Tricks Our family has had our LR3 for two years and are mostly in love with it. However, we've had another set of DFI & Pinch Sensors go bad this past week (our 2nd in the last year), which has me concerned about long-term viability of the unit. Litter-Robot 3 is equipped with infrared emitters and sensors located above the waste drawer that check if the drawer is full each time the globe returns to the Home position. Once a full waste drawer is detected, the unit will indicate it is full with a blue flashing light. So one day, out of the blue, the same issue happened with our Open Air III, all 3 lights blinking and nothing works. What happens is that after restart the yellow light …We understand how confusing this could be, but actually the connect version of the Litter-Robot uses a new model of the DFI sensor that only has one not two lenses as the older model. However, the constant blue LED blinking indicates an issue with the DFI sensor so we recommend you to go through this troubleshooting here:Purchase replacement pinch contacts and drawer full indicator (DFI) circuit boards here, or if your Litter-Robot is under warranty, log in to your …1 / 2. So my litter robot 3 won’t cycle and it is flashing yellow rapidly which I understand is the anti-pinch sensor. I’ve heard of the tin foil hack and may need to resort to it but I worry without the sensor it could cycle while the cats are in there. Not sure iof that is a realistic possibility or not….. Regardless, i read about the ...Hi, litter robot 3 connect blue flashing light (fast flashing). Have taken the robot apart a few times, cleaned the sensors. ... 2- Wipe the DFI sensor’s circuit boards on each side. 3- Install the new bag. 4- Press the “Reset” button on the robot. 5- Reset the level on the app.Our litter robot 3 has been barely working for a while. I'd have to hit reset and cycle for it to actually work. Well, about 2 weeks ago it over rotated during a cycle and became "stuck" (wouldn't rotate back into starting position). Putting it back manually caused a yellow flashing light that wouldn't go away.The DFI sensor that you have received is the new version and it looks different but it has the exact plastic brackets so you can easily install them the same way as the older sensor: Let us know if you need further assistance. ... Litter-Robot 3 Open Air DFI Hardware (v2) ...The Litter-Robot 3 is equipped with infrared emitters and sensors, called DFI sensors, located above the Waste Drawer that check if the drawer is full each time the Globe returns to the Home position. In the event you need to replace your DFI sensors, please follow these instructions. Kit includes: Drawer Full Indicator board assembly (2) retainersThe Litter-Robot 3 Open Air DFI Hardware (v2) is a replacement DFI Hardware for your Litter-Robot 3. It is compatible with Litter-Robot 3 only. What's Included. 1x Litter …The updated DFI Kit is pictured on the bo om. 8-inch #2 Phillips screwdriver (20.3 cm) Preparation: 1 Press the Power bu on to turn the unit o and unplug it from the wall. …1. Empty the Drawer. On the Litter-Robot, you have a drawer that collects the cat litter. If it becomes full, the blue light will blink rapidly. But if you throw out the mess, the lights should go off. Before returning the drawer to its compartment, remember to place a new liner into the container.Note: This problem is EXACTLY the same as this other post I found, which is why I’ve essentially just copied the description from there: Litter Robot Cannot Find Dump Position. Hardware concerned: Litter Robot III Connect. Software concerned: N/A. Troubleshooting steps already taken: unplugging it and plugging it in again; cleaning the …Litter Robot Connect version has a new type of DFI sensor based on laser so it has only one circuit board. Old DFI sensor was based on IR light so it had two circuit boards. ... To reset DFI sensor fault on a Connect Litter Robot please hold Reset button until the blue light blinks quickly. After that, it should come to solid blue light.Litter-Robot 3 is made with standard plastics and the liner is made out of PVC. ... Debris may cause the DFI to indicate a full drawer regardless of the waste in the drawer. ... This will ensure that the automated Cat Sensor is ready for your cat's next visit. Purchase Whisker Cleaner Wipes.http://www.litter-robot.com/ The Main Circuit Board is the brains of the operations. This replacement is for customers whose Litter-Robot is out of warranty,...Litter-Robot 3 is made with standard plastics and the liner is made out of PVC. ... Debris may cause the DFI to indicate a full drawer regardless of the waste in the drawer. ... This will ensure that the automated Cat Sensor is ready for your cat's next visit. Purchase Whisker Cleaner Wipes.Hello @Mariagav , Thank you for your reply. According to your order number, the robot is no longer under warranty. If the cleaning of the DFI sensor didn’t fix the issue, we recommend replacing it so you can order a new one from this link: We also recommend replacing the 3 sets of pins so you can order new ones from these links: The following …Litter robot 3 stops mid cycle. I have had the litter robot air for 2 months and it was working fine but recently it has started to stop every few seconds during cycle. The yellow light flashes and cycle continues after 15 secs but then stops again and again even after the robot is returning to its home position.If the cleaning of the DFI sensor didn’t fix the issue, we recommend replacing it so you can order a new one from this link: ... Litter-Robot 3 DFI Kit + Pinch Detect Terminals Installation: Litter-Robot 3 DFI Kit + Pinch Detect Terminals Installation - …Hi, litter robot 3 connect blue flashing light (fast flashing). Have taken the robot apart a few times, cleaned the sensors. Nothing is working. Ordered June 2022. ... 2- Wipe the DFI sensor’s circuit boards on each side. 3- Install the new bag. 4- Press the “Reset” button on the robot. 5- Reset the level on the app. (For wi-fi model)Find helpful customer reviews and review ratings for Litter-Robot Cats Litter Box III 3 Open Air DFI Hardware at Amazon.com. Read honest and unbiased product reviews from our users. Skip to main content.us. Delivering to Lebanon 66952 Choose location for most accurate options ...Note: This problem is EXACTLY the same as this other post I found, which is why I’ve essentially just copied the description from there: Litter Robot Cannot Find Dump Position. Hardware concerned: Litter Robot III Connect. Software concerned: N/A. Troubleshooting steps already taken: unplugging it and plugging it in again; cleaning the …The Litter-Robot 3 is equipped with infrared emitters and sensors, called DFI sensors, located above the Waste Drawer that check if the drawer is full each time the Globe …The Litter-Robot 3 is equipped with a cat sensor that detects when a cat enters and exits the globe. If a cycle is interrupted or the bonnet is removed, the unit will stop, and the yellow light will flash slowly, about 1x per second. This will also occur if the cat sensor is activated by a cat entering the globe.Unplug the wire from each pinch bar and remove the bars from the plastic slots. Now take some pliers, tin snips, or whatever you have laying around and cut a clean, non-corroded piece of the pinch bar off so you have a small piece of metal. If you're going to bypass both the bonnet and the pinch bars, you'll want to cut off two small pieces of ...As for the blue blinking light, it’s related to the DFI sensor. Let us know if you need further assistance. Sincerely, Mariagav July 5, 2023, 5:02pm 8. Hi Ebram, Thank you for the information you sent me. I still have a problem: the DFI in my litter robot 3 is longer and different than the one received with my order.Hi all, I’ve been trying to troubleshoot my litter robot 3 for a while and the agent is always offline on the app so I can’t get any help on fixing it. My red light for cat timing does not come on and it will not cycle unless I press the button. I replaced the DFI sensors a few month back but I don’t think that’s the problem.How to replace your Litter-Robot's Cat Sensor. Posted on 15/01/2018 by pjutras in Domestic, Pet Care, Litter-Robot, Consumer Robotics. Tags: cat sensor , Litter-Robot , Litter-Robot Open Air , repair , Tutorial. 8318 3 7. Like Share.Trying to figure out the dfi next. Wish I could get schematics of the robot but even with pinch sensor problem fixed the dfi still fails a lot. I have 10 robots all bought within a month and have had to replace 5 dfi sensors, one of them twice. Plus litter robot sent me a new dfi that had no plug on the end of it so they sent me a new one..