How do I factory reset a QRADE/QRAD RF series B onwards panel heater?

To navigate to the Advanced settings menu, from the home screen:

Press and hold Advance and Menu buttons for 3 seconds.

Applicable Models:

QRAD050E, QRAD075E, QRAD100E, QRAD150E, QRAD200E, QRAD050RF, QRAD075RF, QRAD100RF, QRAD150RF, QRAD200RF