48
FAULT CODE
Viessmann
eBUS Communication Fault
Medium Severity
Engineer Required
The eBUS line between boiler and controller has failed.
Step-by-Step Fix Guide
-
Step 1 Engineer only
Check eBUS wiring and controller connections
Gas Safe Reminder
Work on gas appliances must be carried out by a Gas Safe registered engineer. The steps above cover safe checks a homeowner can perform - any internal component replacement requires a qualified professional. If in doubt, always call an engineer.