Over time a small amount of grind particles can escape the chute and fall into the grind switch, causing it to intermittently work. If that happens you can remove the front panel and clean it with compressed air. Tools required:
- 2.5mm allen wrench
- 3mm allen wrench
- compressed air
Follow the video to 4:40. Once you've blow air into the grind button turn the machine on and push the grind button to test for connectivity.