Vaillant gas boiler F.75: what it means and when to call a pro · Italy
Severity: Stop nowVaillant gas boiler error F.75. The boiler did not detect the expected pressure change when the pump started. The usual causes are a pump fault, a pressure sensor fault, or too little water in the system.
Meaning
The boiler did not detect the expected pressure change when the pump started. The usual causes are a pump fault, a pressure sensor fault, or too little water in the system.
Severity
Stop now
Stop. Switch it off and call a pro
Steps are not shown for this code because no qualified person has reviewed them yet. What is safe: switch it off, follow the Do not list and call a pro.
Do not
- Do not keep pressing reset. The manual allows three resets at most, then says to call customer service.
Source
Installation and maintenance instructions ecoTEC pro VUW ..6/5-3, Vaillant
The repair: Boiler pump and circulation repair
Prices for repairs in Italy are in EUR.
Other Vaillant codes
- Vaillant F.00 The flow (outgoing) temperature sensor is disconnected or broken.
- Vaillant F.01 The return temperature sensor is disconnected or broken.
- Vaillant F.10 The flow (outgoing) temperature sensor has a short circuit.
- Vaillant F.11 The return temperature sensor has a short circuit.
- Vaillant F.20 The boiler overheated and the safety temperature limiter cut it out.
Brands in our catalog for gas boiler: Ariston, Baxi, Bosch, Ferroli, Ideal, Potterton, Vaillant, Viessmann, Worcester Bosch. The same code on another brand is not in the catalog yet, and we do not guess what it means.