Recirculation flap not operating

The pin is broken, or the motor is kaput: Ferrari Parts, Accessories, and Performance Products - Ricambi America, Inc.

 

Happened to me a well. The small plastic pin on the actuator motor broke and the replacement is made of brass. Of course my actuator went south shortly after the initial repair, but that a story for another time. Bought my replacements from Daniel too.

Good luck, Henry

 

Try a battery reset first before you buy anything.

 

If that doesn't work, remove the front trunk liner and you'll see the actuator/servo on the front of the air box unit right by the flap. It's only held on by 2 screws. Undo those, pull the actuator off and you'll immediately see if the pin that runs from it to the flapper is broken. If not have someone push the open/close button for recirculation and see if the servo motor runs. If that doesn't work try wiggling the plug going into the back of the climate control computer box.

 

I think the O.P said the flap was still closed....if the pin was broken the flap would just drop down (ask me how I know ).
Definitely take the motor out and hook it up to 12 volts before you order any parts.
There was another post on here that quoted the service manual.....stating that the door was normally closed most of the time.......

 

Heres the other post....read the second post ....conditions under which flap only opens every 10 or 20 minutes on a timer ...

http://www.ferrarichat.com/forum/348-355-sponsored-bradan/483357-f355-aircon-recirculation-flap.html?highlight=hvac+flap

 

In troubleshooting/learning mine, I have realized that the environmental ECU seems to have a mind of its own (which, I suppose, is the whole idea of an ECU, but I digress). One thing I have learned - when the air diverters don't seem to be doing what you want or expect (select "face" but air goes to "defrost" for example), do a hard reset (disconnect and reconnect the battery) in any mode OTHER THAN "automatic". Mine seems to recalibrate itself only if the environmental controls are in, say, "fan 2" and "face". If I reboot in "auto" fan and "auto" air direction, it doesn't work. Early on, I changed the recirculation flap motor, but I don't think it was the problem - I think it was the reboot procedure I was doing.

 

What is your recalibration process for the ECU?

 

Look at the conditions of flap activation and see if they apply to you.
I would also get an electrical contact cleaner (used for computers,ecu,ect) and clean the connections for the climate control panels.

 

Technical term?

 

googled definition of "kaput": utterly finished, defeated, or destroyed.....
(its a slow day)

 

Probably just to get a good seal when in recirculation mode.
Can't beat a relatively cheap and easy fix. Of all the possible causes, this was the best one to have.

 

It does seal the airbox. Mine fell out as well so I put some contact cement on the foam strip and on the spot where it is installed....another easy fix.

 

The foam strip seals the flap inside the top of the airbox (at the pivot point of the flap)... in the area where the replacement brass pin was installed.
It is hard to explain

 

I "think" my recirculation flap motor is working properly. When energized, it will close the flap (which is the up position). However, I don't understand
the mechanics and what occurs when the motor is not energized? My flap stays in the up position? When the motor does not have power, is the motor
shaft suppose to let loose or spin freely to allow the flap to drop down?

 

In theory, motor friction, gear friction and the gear ratio of the actuator drive should hold the flap in position. With such a heavy flap and given enough time and vibration, I suppose the flap would fall.

But isn't the flap always powered with the ignition on?

 

I have heard that the flap is heavy, but mine is like a wet noodle and has no weight? What am I missing?

If the flap is always powered with ignition on, what happens when no power is passed thru the flap motor?
When my motor is not connected to power, the shaft of the motor is rigid and does not seem to allow the flap
to drop down? Is the motor supposed to reverse direction when de energized?