This model comes with a rain sensor that automatically closes the dome when wet.
Fantastic fan rain sensor override.
Depends upon the model.
Now all fans are working properly.
If out of warranty call fantastic fan.
Push and hold the up down button again red light goes out sensor is reenabled.
Here are some generic instructions.
Realizing that the fantastic fans are basically worthless because the rain sensor overrides the fan operation i disabled all three fan rain sensors by cutting the wires running from the rain sensor to the fan circuit board.
The simple reverse switch changes the direction of the fan blades drawing air in or out of the vehicle.
The powerful yet compact dometic fan tastic vent model 7350 has automatic variable speeds to get the airflow precisely as you want.
Push and hold the up down button for a few seconds red light comes on rain sensor disabled.
Below are four photos showing how to disable the rain sensor.