For me I20 error was a faulty pressure sensor. I paid a technician $300 to find the problem and replace the pressure sensor. When he removed the sensor he showed me that it was full with food and dirt. I asked him if we could just open it up and clean it but he said that the sensor was very delicate and it’s glued together so it was almost impossible to open it up and remove the dirt. So he replaced it. Like I said that set me back $300. A year passed and the same problem happened again. So I gave it a go. I flipped the dishwasher sideways remove the sensor and try to clean it with a toothpick. Not good enough. I could only remove what was visible and not what was inside the sensor. I use my water flosser which is a pressure washer for your teeth. It worked. A lot of black stuff came out. I also clean the old sensor that I had from the first repair. Dishwasher works like new. :)
Image of sensor
https://goo.gl/images/RkxM1s
For me I20 error was a faulty pressure sensor. I paid a technician $300 to find the problem and replace the pressure sensor. When he removed the sensor he showed me that it was full with food and dirt. I asked him if we could just open it up and clean it but he said that the sensor was very delicate and it’s glued together so it was almost impossible to open it up and remove the dirt. So he replaced it. Like I said that set me back $300. A year passed and the same problem happened again. So I gave it a go. I flipped the dishwasher sideways remove the sensor and try to clean it with a toothpick. Not good enough. I could only remove what was visible and not what was inside the sensor. I use my water flosser which is a pressure washer for your teeth. It worked. A lot of black stuff came out. I also clean the old sensor that I had from the first repair. Dishwasher works like new. :)
Image of sensor
https://goo.gl/images/RkxM1s
For me I20 error was a faulty pressure sensor. I paid a technician $300 to find the problem and replace the pressure sensor. When he removed the sensor he showed me that it was full with food and dirt. I asked him if we could just open it up and clean it but he said that the sensor was very delicate and it’s glued together so it was almost impossible to open it up and remove the dirt. So he replaced it. Like I said that set me back $300. A year passed and the same problem happened again. So I gave it a go. I flipped the dishwasher sideways remove the sensor and try to clean it with a toothpick. Not good enough. I could only remove what was visible and not what was inside the sensor. I use my water flosser which is a pressure washer for your teeth. It worked. A lot of black stuff came out. I also clean the old sensor that I had from the first repair. Dishwasher works like new. :)
Image of sensor
https://goo.gl/images/RkxM1s