what failure can cause a new fridge *fan* to run all the time?
what can cause this failure?


The unit has two fans, a "condenser fan" and an "evaporator fan"

The condenser fan should come on only when the temperature drops below the temperature set by the thermostat.

It looks like it is designed for an "evaporator fan" to be running continuously when the door is shut

 

Power goes to the lamp (presumably when the door is open) or to the evaporator fan (when the door is closed).

So the answer depends on whether what you are hearing is the evaporator fan or the condenser fan.

Either way, it is a new unit and either faulty or not suited for your intended purpose - so I'd take it back for a refund.