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Knowledge document #3366

Cannot register a FRITZ!DECT radiator control

Registration of the radiator control, for example FRITZ!DECT 302, to the FRITZ!Box fails. After you push the DECT or Connect button on the FRITZ!Box, the DECT connection is not established. The symbol for the radio connection is not permanently shown in the display of the radiator control. The radiator control is not displayed or is displayed with an inactive connection in the menu "Smart Home" in the FRITZ!Box.

Note:All instructions on configuration and settings given in this guide refer to the latest FRITZ!OS for the FRITZ!Box.

Simply proceed as described below. After each measure, check whether the problem is solved.

1 Maximum number has been reached

A certain number of smart home devices can be registered with the FRITZ!Box. If you already registered the maximum number of devices, you cannot register any more, and therefore no smart plugs.

2 Unlocking the buttons

  1. Click "System" in the FRITZ!Box user interface.
  2. Click "Buttons and LEDs" in the "System" menu.
  3. Click on the "Keylock" tab.
  4. Disable the "Buttons locked" checkbox.
  5. Click "Apply" to save the settings.

3 Disabling "Reduce DECT field strength"

  1. Click "Telephony" in the FRITZ!Box user interface.
  2. Click "DECT" in the "Telephony" menu.
  3. Disable the option "Reduce DECT field strength" in the section "Radio Field Strength".
  4. Click "Apply" to save the settings.

4 Disabling "DECT Eco"

  1. Click "Telephony" in the FRITZ!Box user interface.
  2. Click "DECT" in the "Telephony" menu.
  3. Disable the option "DECT Eco" in the section "Radio Field Strength".
  4. Click "Apply" to save the settings.

5 Enabling encryption

  1. Click "Telephony" in the FRITZ!Box user interface.
  2. Click "DECT" in the "Telephony" menu.
  3. Enable the option "Permit only secure DECT connections (recommended)" in the section "Security".
  4. Click "Apply" to save the settings.
  5. If the option was disabled, you must then restart the FRITZ!Box once using the user interface ("System > Backup > Restart").

6 Setting a PIN

For automatic registration to work, you must set the PIN to "0000" in the FRITZ!Box user interface:

  1. Click "Telephony" in the FRITZ!Box user interface.
  2. Click "DECT" in the "Telephony" menu.
  3. Enter "0000" as the PIN in the section "Registration".
  4. Click "Apply" to save the settings.

7 Re-registering FRITZ!DECT radiator controls

Loading the factory settings of the radiator control

  1. Push the "Menu" button on the radiator control. With FRITZ!DECT 302, hold the button down for at least 2 seconds.
  2. If available, push (next menu page).
  3. Push (load factory settings) or select the menu item "Zurücksetzen" or "RES".
  4. Push "OK".
  5. Push "OK" again, if you are asked to do so.

Establishing a DECT connection

  1. Remove the batteries from the battery compartment on the radiator control for at least 30 seconds.
  2. If the radiator control is not mounted on the radiator:
    1. Click "Smart Home" in the FRITZ!Box user interface.
    2. Click "Devices and Groups" in the "Smart Home" menu.
    3. Click the "Register Device" button.
    4. Within 2 minutes: Reinsert the batteries. Follow the instructions on the display of the radiator control.
  3. If the radiator control is mounted on the radiator:
    1. Reinsert the batteries.
    2. Follow the instructions on the display of the radiator control. The valve adjustment is complete as soon as the preset temperature appears in the display.
    3. Click "Smart Home" in the FRITZ!Box user interface to register it with the FRITZ!Box.
      1. Click "Devices and Groups" in the "Smart Home" menu.
      2. Click the "Register Device" button.
      3. Within 2 minutes: Push the "Menü" button on the radiator control.
      4. Push (start registration) on FRITZ!DECT 302 and then "OK".

        Important:Push the button next to "OK", not "OK" on the display.

      5. On FRITZ!DECT 301, select the menu item "FUNK" or "Anmeldung" and push the "OK" button. The message "Anmeldung war erfolgreich" is shown.

The radio connection is established as soon as the symbol for the existing radio connection appears in the display of the radiator control.

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