BOSCH Coffee Machine Error Codes| Troubleshooting BOSCH Coffee Machine Error Codes| Troubleshooting Number of BOSCH errors  What does it mean Recommendations 1 Malfunction of the temperature sensor. Low temperature of the drink Contact the service center. Replace sensor. Spend decalcification 5 No fuser heating Conduct decalcification. If it does not help – contact the service center 8 Faulty