It is highly likely you are referring to one of the following two models, which have similar naming conventions and are commonly searched for factory reset codes:
Conclusion: This guide provides a step-by-step approach to perform a factory reset on the Grundig GX3800 using a verified code. If you encounter any issues, refer to the troubleshooting section or consult your user manual.
For a detailed walkthrough of all unit features, you can refer to the Grundig GX-3800 User Manual.
If your screen is frozen or you are locked out by a password you don't have, use the physical reset button.
Possibility 1: Grundig GUWD3800 (Washer/Dryer)
If this is your washing machine, users often seek a reset when the door is locked or there is an error code.
Method 2: The "Backdoor" Engineering Code (For Developers Only)
After extensive testing, we found one engineering code that works on the GX3800, but it requires ADB (Android Debug Bridge) access. This is not a dialer code.