To Next PageTo Next PageWhat does it mean when my Bosch Optiflow Professional GWH12 Water Heater indicates the temperature selected is too low?
If the Bosch Water Heater displays an indication that the temperature selected is lower than the minimum, increase the hot water flow or select a higher temperature. If the problem persists, contact an authorized service technician.
What to do if my Bosch Optiflow Professional GWH12 Water Heater shows error EA?
If the Bosch Water Heater displays error code EA, it means a flame was not detected. First, check that the gas supply to the appliance hasn't been turned off. If the problem persists after restarting the appliance, contact an authorized service technician.
How to fix Bosch Optiflow Professional GWH12 Water Heater error CF?
If your Bosch Water Heater displays the error code CF, there might be a blocked flue gas outlet or insufficient air flow for start-up. Try removing any dirt or obstructions from the flue terminal and/or pipe. You can also press the reset button. If the issue continues, contact an authorized service technician.
How to troubleshoot Bosch Water Heater error code E0?
If your Bosch Water Heater displays error code E0, it indicates a failure of the control module. To resolve this, unplug the electrical connection for 10 seconds, then reconnect and restart the appliance. If the problem continues, contact an authorized service technician.
Why is my Bosch Optiflow Professional GWH12 Water Heater showing error A1?
If your Bosch Water Heater displays error code A1, it could indicate a high temperature inside the water heater housing, possibly due to a calcified or sooted heat exchanger. Note that the appliance automatically regulates its performance to prevent overheating. If the problem persists, it's best to call an authorized service technician.
What does error code EC mean on a Bosch Optiflow Professional GWH12?
If your Bosch Water Heater displays error code EC, it indicates a failure of ionization during operation. You should check the type of gas being used, the gas pressure, the ignition system, and the output of combustion gases, removing any dirt or obstructions to ensure good extraction.
What should I do if my Bosch Optiflow Professional GWH12 shows error E1?
If your Bosch Water Heater displays error code E1, it means the hot water temperature sensor has detected overheating. Let the appliance cool down and try again. If the problem persists, call an authorized service technician.
Why is my Bosch Optiflow Professional GWH12 showing error A9?
If your Bosch Water Heater displays error code A9, it could be due to the hot water outlet temperature sensor not being fitted properly or low incoming gas pressure. Check the temperature sensor and its connections. If the problem persists, contact an authorized service technician.
How to fix Bosch Optiflow Professional GWH12 Water Heater error code EE?
If your Bosch Water Heater displays error code EE, it indicates that the modulating solenoid valve is disconnected. Check the solenoid connections. If the problem persists, contact an authorized service technician.
What to do if my Bosch Optiflow Professional GWH12 shows error FC?
If your Bosch Water Heater displays error code FC, it means that the buttons are stuck in a pressed position for more than 30 seconds. Release the button. If the problem persists, call an authorized service technician.
General| Type | Tankless |
|---|---|
| Capacity | N/A (Tankless) |
| Energy Source | Gas |
| Ignition Type | Electronic Ignition |
| Temperature Range | 35°C - 60°C |
| Weight | 10 kg |
| Gas Connection | 1/2 inch |
| Water Connection | 1/2 inch |
| Maximum Power | 24 kW |
| Hot Water Production Rate | 12 L/min |
| Water Flow Rate | 12 L/min |
| Protection Class | IPX4 |
| Maximum Inlet Water Temperature | 60°C |
| Minimum Inlet Water Pressure | 0.2 bar |
| Maximum Inlet Water Pressure | 10 bar |
| Fuel Type | Natural Gas |
| Voltage | 220-240V |
