Source-backed catalogue
Verified boiler fault-code guides
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Vaillant · ecoTEC sustain
- Vaillant F.00Fault: Flow temperature sensor
- Vaillant F.01Fault: Return temperature sensor
- Vaillant F.10Short circuit: Flow temperature sensor
- Vaillant F.11Short circuit: Return temperature sensor
- Vaillant F.22Safety shutdown: Water deficiency in the boiler
- Vaillant F.46Short circuit: Additional temperature sensor at the water inlet (installed solar set, optional)
- Vaillant F.49eBUS fault: Voltage too low
- Vaillant F.63Fault: EEPROM
- Vaillant F.64Fault: Electronics / sensor / analogue-to-digital converter
- Vaillant F.65Fault: Electronics temperature too high
- Vaillant F.71Fault: Flow/return temperature sensor
- Vaillant F.72Fault: Deviation in the water pressure sensor/return temperature sensor
- Vaillant F.73Fault: Water pressure sensor short-circuited
- Vaillant F.74Fault: Water pressure sensor not connected
- Vaillant F.75Fault: Pump/water deficiency
- Vaillant F.84Fault: Flow/return temperature sensor (values not consistent)
- Vaillant F.85Fault: Temperature sensor
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