If your sauna is equipped with the SSB style control there may be an additional black wire:
- There is a thermometer already in the main device (bottom right pin in photo). This black wire connector jack is unused, only for optional external sensor if the keypad is to be installed outside of the steam room.
DISCLAIMER: DO NOT ATTEMPT TO DIY - ADVICE ONLY FOR LICENSED PROFESSIONALS. ALWAYS DISCONNECT THE POWER WHEN SERVICING.
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