Viessmann boiler error code f4
The F4 error code is a Predictive Failure Error and indicates that the temperature sensor has detected a predicted failure in the heating control valve.
This may be due to an obstruction or other problem with the sensor or heating controls.
The user will get help on what to do with the viessmann boiler error code f4. The boiler will be more efficient, and the user can have a more pleasurable experience using it.
Viessmann boiler error code f4 can be triggered for a variety of reasons. Perhaps the most common cause of this trouble indicator is that the burner has been extinguished, such as when the pilot valve is inadvertently operated or when there is no power supply to boilers with a “half-load” function. The F4 error code also occurs when there has been an overpressure in the hot water circuit due to excessive flow or pressure-limiting device failure. It may also be traceable to incorrect operation, such as using parts other than genuine viessmann spare parts or replacing an air vent with a standard drain cock
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