Troubleshoot error code “L09” in Dietrich boiler

How to eliminate the error L09 in boiler Dietrich?

  • Error: L09
  • Description: TSEG.RETORNO – Too high return temperature
  • Cause: 
  • Solution: Bad connection of probe failure 4 Notify the professional to take care of the maintenance of the apparatus

More tips

If you cannot solve the problem with your Dietrich boiler, it is best to contact a specialized technical service. They can advise you on the best way to solve the problem and, if necessary, repair or replace the boiler.

Other error codes in Dietrich boiler

Errors or error codes of Dietrich Boiler

Errors or error codes of Dietrich Boiler

When your Dietrich boiler starts to show unusual behaviors, the first thing you should do is check if it is displaying any error codes on its control panel. These codes ...
Troubleshoot error code "SCU electronic card not installed in the boiler" in Dietrich boiler

Troubleshoot error code “SCU electronic card not installed in the boiler” in Dietrich boiler

How to delete the Electronic SCU card error not installed in the boiler in boiler Dietrich? Error: SCU electronic card not installed in the boilerDescription: Cause: Solution: Notify the professional ...