My 575M's Air Conditioning problem was due to blocked Dryer/Filter

Thanks for the heads up, Richard.... I think I'll order one for my next major.

 

Note Ferrari calls for replacing the 575M receiver/filter/dryer every two years, but hardly anyone does. Now we know why it needs to be changed.

 

Thanks for the info and pictures

 

Thank-you, Richard.

Barry

 

Well said. It is on my to-do this year as I dont think it was ever changed on my 575 and the AC is just feeble vs my 456M.

 

Can anyone help with a part number? I checked the block diagrams and I’m not convinced I’m looking at the right part

 

If its a 550/575, looks like this part, also come back as the superceded correct part for 456M cars

Part number 64894200

https://www.eurospares.com/Parts/64894200/Ferrari?pi=59368

And for 456GT/GTA part 63934300

https://www.eurospares.com/Parts/63934300/Ferrari?pi=39448

 

GREAT info. I need to track down the 456M equivalent.
I had no idea. Thanks for the post.

Found it via a sponsor.

Thanks everybody. Ordered.

 

Pretty much any generic receiver that fits will work, but that is a good price for a Ferrari part.

 

That is a good deal; I would buy new not used here unless you plan to bake it to remove the moisture….

 

All in it costs around $200 if you import it or purchase locally from a vendor.
After I bought the one in stock it went to “special order item” not in stock.

 

Call David at All Ferrari parts 614-855-1103. $135 + shipping. It needs to be special ordered as you mentioned.

 

For reference, my standard 575 AC Service:

• Vacuum Evacuate AC System fully (ideally overnight if possible / confirm no leaks, replace any needed hoses)
• Check AC Compressor for leaks/seepage (rebuild if needed)
• Replace Receiver/Dryer (64894200) - if still riveted, replace with threaded fastener for future service
• Clean Pressure Switch (66374400) contacts; order if replacement needed
• Replace AC compressor oil/refrigerant (R134 charge: 1.68 lbs or 27 oz)

 

If you don’t mind, how difficult is the removal and replacement ?

Kinda can’t wait to cut my old one open and see how it looks after 30k !

 

How much oil if just replacing receiver /dryer? Thanks

 

I have not done it yet, it is a summer project after we wrap up the 456M major + Radiator re-core/rebuild.

I don't know unfortunately, sorry

 

If parts are replaced under these conditions the dryer is the 1st thing suspected not the second. The RD is an A/C service item. If a paying customer with broke system where charge level is suboptimal RD replacement is part of the best practices service. It is a shortcuts to just charge the system to find it still does not work. The expansion valve is also called and orifice valve. The orifice is engineered really small. Moisture in the A/C system freezes in the orifice and cuts the flow. But the moisture in the system comes from a suboptimal charge with atmospheric air replacing it and a failed RD. The RD isn't plugged it is no longer drying. There is desiccant in there that pulls and hold moisture. The tech is also responsible to pull moisture out of the system by holding about 1 atm of vaccum for at least an hour. That's generic time and pressure that works. A manufacturer will have a protocol for that vacuum and for how long.

As a DIY I may work on 5 cars all year while a real tech 100's? I have no idea. But in my small sample size I have rarely replaced a RD. I have 95% of the time reused them by baking in the oven at 250F for a couple hours similar to what you would do to recharge a desiccant pack people put in gunsafes. My maranello A/C freezes me by the way and I can't use it on "full" after just a few minutes entering a hot car. The system is quite good like a BMW but not as good as GM.

 

I have a 2003 575 and to my knowledge it has never had the system opened and it blows cold air.
the Dryer on the 575 is difficult to get to.

 

I’m getting a horrible whine from my A/C when the fan is set higher...still blowing cold though… Also makes odd noises when I change the mode from automatic…hoping I can put the repair off until the winter. Any risk of causing bigger problems deferring this issue?

2003 575