What to do if my Bosch OptiFlow Professional GWH12 1 CTD E23 is overheating?
If the hot water temperature sensor detects overheating in your Bosch Water Heater, allow the appliance to cool down and then try again. If the issue continues, it's best to call an authorised service technician.
How to fix a control module failure in my Bosch Water Heater?
If your Bosch Water Heater's control module fails, unplug the electrical connection for 10 seconds. Then, reconnect and restart the appliance. If the problem persists, contact an authorised service technician.
What to do if my Bosch Water Heater shows error F7?
If you encounter error code F7 on your Bosch Water Heater, which indicates a flame is detected even when the appliance is off, reconnect and restart the appliance. If the problem persists, it is recommended to call an authorised service technician.
What does error code FC mean on my Bosch OptiFlow Professional GWH12 1 CTD E23 Water Heater?
If your Bosch Water Heater displays error code FC, and a button is stuck in the pressed position for more than 30 seconds, release the button. If the problem continues, it's best to call an authorised service technician.
Why is my Bosch OptiFlow Professional GWH12 1 CTD E23 Water Heater showing error code A1?
If you are experiencing issues with your Bosch Water Heater and it displays error code A1, this could be due to a high temperature inside the water heater housing, possibly caused by a calcified or sooted heat exchanger. The appliance automatically regulates its performance to prevent overheating. If the problem persists, call an authorised service technician.
What does error code EA mean on my Bosch OptiFlow Professional GWH12 1 CTD E23?
If your Bosch Water Heater displays error code EA, make sure that the gas supply to the appliance hasn't been turned off. Reconnect and restart the appliance. If the problem persists, call an authorised service technician.
How to fix error code CF on my Bosch Water Heater?
To address error code CF on your Bosch Water Heater, try the following: 1. Install a pressure limiting valve if necessary. 2. Remove any dirt or obstructions from the flue terminal and/or pipe. 3. Close and then open a hot water tap. If the problem persists, call an authorised service technician.
Why is my Bosch OptiFlow Professional GWH12 1 CTD E23 Water Heater's temperature lower than selected?
To resolve the issue of the temperature selected being lower than the minimum supplied by your Bosch Water Heater, which can occur due to high incoming water temperatures or low flow rate, increase the hot water flow. You can also select a higher temperature. If the problem continues, it's best to call an authorised service technician.
What does error code E4 mean on my Bosch Water Heater?
If your Bosch Water Heater displays error E4, which indicates the air temperature sensor detects overheating due to leaking combustion products inside the combustion chamber, switch off the power point and remove the plug from the electrical socket. Do not try to restart the appliance and call a service agent immediately.
Why is my Bosch OptiFlow Professional GWH12 1 CTD E23 displaying error A9?
If your Bosch Water Heater is showing error code A9, it may be due to the hot water outlet temperature sensor not being fitted properly or low incoming gas pressure. Check the temperature sensor and associated connections.
General| Brand | Bosch |
|---|---|
| Model | OptiFlow Professional GWH12 1 CTD E23 |
| Category | Water Heater |
| Language | English |
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