How to eliminate the B21 error in boiler Dietrich?
- Error: B21
- Description: Bl. Com your – communication error between PCU electronic cards and their
- Solution: Bad connection 4 Notify the professional to take care of the maintenance of the apparatus
Dietrich as soon as possible fails to solve the Error boiler Dietrich, we recommend that you contact the technical or specialist service in the installation of Dietrich boilers as soon as possible. They can help you diagnose and solve the problem of your boiler, and will allow you to use it safely.