Buderus · Logamax plus Boilers
The boiler is not receiving a feedback signal from the pump, suggesting it's not operating correctly or there's a communication issue. This is a locking fault, and the boiler will attempt to self-correct.
Click steps to track your progress.
Allow the boiler to attempt an automatic reset.
Power cycle the boiler by switching it OFF and then ON again using the main power switch.
If the problem continues, contact a qualified service technician to check the pump's electrical connections and operation.