I have a stuck blend door. stuck on defrost. My blower works I purchased a new actuator (not used) and tried it by plugging it into the actuator plug under the dash. Doesn't turn I went looking for the 30 amp fuse some folks describe under the bonnet carpet. Didnt find that but i did find i am missing a fuse on the panel. Not sure what it goes to or what size fuse is supposed to be in there. Is this part of my problem? and what does this missing fuse go to?
The missing fuse is unrelated to your issue. The empty fuse holder is only to be used for test purposes on your Teves braking system. Does the new or old actuator cycle through 180 degrees “learning cycle” when you reset the battery cutoff switch? Note that the behaviour of the air blend system may be dictated by outside air temperature. Always run your car up to temperature after using the battery cutoff switch and before testing the blend door. When replacing the actuator, be sure to align the index marks on the actuator and the blend door spindle.
Thanks! I did not run the car up to temp before testing the new actuator I just plugged it into the 5pin plug and it did nothing I will retry: 1) reset power 2) then up to temp 3) new actuator motion FWIW recirc air also does nothing
Oh... So perhaps there is a problem with the ECU. However, the most common problem with recirc is the plastic boss/drive on the flap breaking. Brass replacements are available at Ricambi or Hill Engineering UK. https://www.ricambiamerica.com/348-355-air-re-circulation-boss.html On your earlier car, the ECU will be located here: Image Unavailable, Please Login Anyway, try the battery reset/warmup cycle first. Since you have the luggage liner out, you could maybe check the ECU connectors and pins for cleanliness and security. To remove the yellow plug, you'll first have to pull the black clip ("saddle") section forward (about a quarter inch), away from the ECU.
Follow up I did the ECU reset of power off for an hour, then start and run to temp. This got the new blend actuator to work. Old one must have bad gears as it vibrates in your hand when activated like its stuck inside I did find a piece from the center vent had fallen into the blend door barrel, which probably didn't help the gear longevity. So blend is working with the new ferrari alternative actuator from eurospares Recirc actuator not wokring still but I have a new actuator for that. How do i get to the recirc actuator? Under the dash or from the frunk?
Found the frunk recirc actuator Old one is bad, no turning Connect new one and it spins continuously regardless of the button position, in the direction of closing the door I see on the parts diagram there is an air intake sensor is this sensor detecting the position of the recirc door? and then stopping and/or reversing polarity of the motor?
Most likely the plastic drive has broken, not the actuator, but it’s good you have an actuator if needed. The flapper door is very heavy. It’s not surprising the recirc door system fails. When installing the drive or actuator use some cotton thread to support the door. Note that it doesn’t matter what position the actuator is in during installation as long as it aligns with the square drive in the flap. It will find the end stops automatically.
Sorry, cross-posted. No, there are only two positions for the flap. When the flap hits the end stops, the actuator motor stalls. It’s a bad design, but you’ll still get 20 years of life out of the new actuator.
Ok but after i install it it closes but the button does not reopen it? With the actuator connected but not installed the motor turns all the time regardless of whether the button is pushed in or not, effectively holding the door closed all the time What is supposed to cause the door to reopen when the button is released? I think maybe my switch is toast since its "On" all the time
on my 348 this intake air flap is askew due to the aft pivot "axle" of the door flap is sheared off. Big question is how to extract air door to repair pivot ?
I believe I've read somewhere that some owners have installed two "micro switches" or limit switches so the flap servo drive motor does not load up at the travel limits and damage the plastic gears or break the flap drive. Comments ?
Ok so wierdness continues: I installed the new recirc actuator. With car on the fresh air door closes Cycle the fresh air button and nothing happens, door stays closed. The stop button: Fresh air button operates correctly only when the stop button is pressed aka"DOWN". So no fresh air with any of the HVAC systems on Release the stop button "UP" and the fresh air door closes, regardless of the fresh air button position
It's probably overkill if you don't drive your car too often. Others might disagree. I've only had to change the drive boss in the last 8 years (it was broken when I bought the car).
Ok so weirdness continues: I installed the new recirc (fresh air) actuator. With car on the fresh air door closes Cycle the fresh air button and nothing happens, door stays closed. The stop button: Fresh air button operates correctly only when the stop button is pressed aka"DOWN". So no fresh air with any of the HVAC systems on Release the stop button "UP" and the fresh air door closes, regardless of the fresh air button position Is this somehow the correct operation? Effectively fresh air only when the stop button is pressed?
Expect weirdness from a Ferrari. Unfortunately, I can't test mine at the moment (6am Sunday morning). According to the Workshop Manual, with the recirc button released, the ECU controls the operation of the recirc flapper. Recirc button released (up): "The ECU (?) uses recirculated internal air only if external ambient temperature is higher than 70F (21C) and internal temperature is lower than 77F (25C). If outside air temperature exceeds 77F (25C), a timer automatically selects external air to provide a change of air every 20 minutes. If outside air temperature is less than 77F (25C), the timer selects external air every 10 minutes." Recirc button pushed "Internal (passenger compartment) air is recirculated. In this condition, the internal air is not changed" Maybe by using the STOP button, you are bypassing the ECU logic?
Now that makes sense. Im doing all this with the top down so I'm assuming the temps are equal at about 65 in and out. Might have to wait until next week to get some ambient exterior temps over 70
Someone had a procedure recently on how to reset your vent actuator/ECU after the battery has been disconnected. Does anyone have that procedure or which thread it was on? For the life of me I can't find it.
