Manual for pendant uniden sse37 - Uniden Lands Phones

Losing pendant displays on cool to cold mornings with your Bosch Highflow 25 EC hot water heater could be caused by temperature-related issues affecting the display module. Cold temperatures can affect electronic components, causing them to malfunction. It's possible that there could be a loose connection, moisture buildup, or a fault in the display module itself. I'd recommend contacting Bosch customer support or a qualified technician to diagnose and fix the issue.

The following is taken directly from the SSE37 owners' manual:

Registering a handset
If you see a "not registered" message on a handset,
you must register it to a base before using it.
1.
On the base, open the menu and select
Register Accy.
2.
On the handset, press and hold #/DND
until the handset display says
Handset Registering (about 2 seconds).
3.
Wait until the handset display says
Registration Complete (about 30 seconds),
then pick up the handset.
If you don't hear a dial tone or the display says
Registration Failed, charge the battery completely,
then try again.


Good luck!

Verify my quantum pendant serial number SH 81226.. Is this fake or not?

is it a metal pendant? If so you might be able to use a magnet to get to it.