Tecma head with false full red light

Joined
Jan 28, 2018
Messages
22
Fluid Motion Model
R-31 CB
Non-Fluid Motion Model
Beneteau 311
Vessel Name
Transcendance
2023 32CB with Thetford Tecma head. Red full light permanently lit in spite of tank empty. Emergency flushing works. I did the following, as I am at sea long term for next month:
1. 12v breaker reset, multiple times
2. Check tank with bright light. No obstructions.
3. Cut one wire to high sensor. No change.
4. Cut second wire to sensor. No change.
5. Joined the two Cut wires to eliminate sensor. No change.

I am at a loss as to why the last intervention did not solve this red light full problem, as tge high/full sensor is bypassed. I would really like this head to work, even without the full sensor.
 
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