My Litter Robot stopped working correctly consistently. It would flash all of the lights for a while and then try to empty the Robot, but end up emptying most of the litter on the floor on the left side of the Litter Robot. Litter Robot support was very unhelpful. They had me checking things that really had nothing to do with my problem. I had a bad hall effect (position) sensor in my Litter Robot 2 - at least I think that is what was wrong with it. I was very anxious if the new sensor harness would work or not. The Robot Shop Repair Guide tutorial walked me through every single step of replacing all of the wiring. The repair guide tutorial was invaluable. I actually found it by searching the internet. It took me about an hour give or take. Next time, it would probably be half that time since I learned a lot. A few things in my LR2 were slightly different than the tutorial (like the safety line connectors and my hall effect sensor was glued inside), but everything else was spot on. Make sure that your connections to the circuit board are exactly like shown in the Repair Guide photos. I had one connector reversed and it was giving me trouble. It was tripping a sensor. It's really easy to do because both circuit board connectors will accept the cables two ways. Customer service was beyond helpful in answering several questions. I will without a doubt purchase from Robot Shop in the future, especially for Litter Robot parts. I saved myself hundreds of dollars over sending it in for repair or buying a new one. If you have the willingness to try to repair it yourself, I think you can also save yourself a lot of money over sending it in for repair to Litter Robot.