A/C Working, but no cold air is coming out

If this was a 348 I would say it is a malfunctioning recirculation flap. That was the issue with my 348 A/C. Maybe the same on a 355.

 

It doesn't matter if the flap is open, closed or at any setting in between. If the A/C is fully charged and working you will still feel a significant amount of cooled air. His flap may be bad but it's certainly not the sole problem.

 

Is the A/C clutch still engaging (clicking on)?

 

Maybe it is kicking inb, but then it may kick out?

It may have a faulty wire somewhere or a fautly a/c clutch?

Is your mechanic 100% sure the compressor is kicked in when it blows hot air?? I would double check that.

If it is and that is all ok, then it may be a heater tap issue. Meaning, the heater is on when the a/c is on...........if you understand what I mean?

 

I noticed your post yesterday and am surprised that no one has mentioned the stepper motor.
As a rule i have stopped posting help on forums, but i feel your pain so here goes I had exactly the same problem on a couple of my cars, started out cold then stopped and only pumped out hot air. Try this, i bet you this works
You see the arrowed hose in picture 1? That takes the hot water to your heater matrix. The unit that i have arrowed for you is the stepper motor. This controls the hot water flow to the matrix from a slow flow to completely closing the hot water off.
Now in picture 2 you can see that the hose has been completely sealed of using a pair of vice grips. If you do the same to your cars hose you will have freezing cold air flow from your dash board in abundance. This will clarify that its indeed either your stepper motor or the center console switch that controls this, that's at fault
I had my hose closed of during the hot summer in 08 until i found a reasonably priced stepper motor. Freezing air all summer is better than hot air

Pic1 http://img12.imageshack.us/img12/778/29189471.jpg
Pic2 http://img130.imageshack.us/img130/7136/dscf4239small.jpg

 

Good work Sambo, I was thinking the same thing.

I called it a heater tap.

They can break the arms off, there are pics on here somewhere.

Or power to it fails, perhaps motor has burnt out too?

 

Good to hear you guys are on the right track.

 

If you do not have the P/N by tomorrow drop me a PM and I will give you it as I have a spare motor in My garage and will be home tonight (PM as a reminder to me) do NOT be rash and go for the Ferrari part as there is an alternate that is way cheaper.

 

They are the same part for Saab as they are for ferrari. They coast 70% less at Saab. Saab part # 9000 P/N 9625435.
Glad you have sourced the problem, a man needs cool air Right, im of again

 

Cut the hose and install an in line ball valve. Turn the valve closed for the summer and open it when the cold fronts come through. I am not sure what part # the stepper motor is, but the error might also be in the A/C control module, telling the stepper motor to open up the flow even when you have the temp set on cold (I assume you have the temp control set correctly). All these A/C systems are "Reheat" type, so the air gets chilled, then reheated to some degree with recirculated engine coolant. Thanks to Sambomydog... I never really got cold air form my 348, even after 4 attempts at getting the system right. I just learned to live with the slightly less than ambient temp output.

BT

 

Please remember though this part does fit and work perfectly it is not the same part as the spindle shaft has to be cut to the same length as the one on the faulty motor small detail but frustrating if you are trying to put it back and you cannot figure out why it is not going on, P/N of the motor I have in front of me is Bosch 0 390 721 006 and is indeed for a Saab.