I have a 2014 XJ Supercharged. At about 75409 miles Climate system stopped blowing anything but warm air. I took it to a local shop that would work on it, but their solution was to replace the Compressor, Condenser, Dryer and Expansion Valve at $4,400. The shop claims that the Compressor is failing, contaminating the rest of the system. That sounded a little "Far Fetched" so I connected my iCar Soft i930 to look for codes. The codes found were B1352 Key-in circuit failure, B1364 Rear Left Temp Damper Motor, B13CZ Windshield Misting Sensor, V0447 and P007B.

I would have thought that if the compressor was failing that there would have been a code related to it. This system uses R-1234 refrigerant. I checked all climate related fuses listed for all fuse panels. None were blown.

The nearest Jag dealer is 1 hour and 15 min away.


Any thoughts please.

 

Usual failure is the "DPS valve". The way this system works is the AC compressor clutch is always engaged when the AC is turned on, and the flow of refrigerant is controlled by a solenoid valve in the back of the compressor called the DPS valve. This valve fails and produces the warm air symptoms. If there are no weird noises coming from your compressor or unusually high temperatures at the compressor itself or the discharge pipe, I wouldn't expect or immediately diagnose compressor failure. Some shops get in over their head with AC work and their first solution is to "replace everything". $4400 is about half the value of the car.

Unfortunately DPS valve replacement does involve discharging the refrigerant and removing the compressor. I would replace the drier bag at the same time (easy swap and requires no major disassembly) before you renew the refrigerant. I would expect to pay $700-1000 to have this job done at a dealership.

 

It sounds like they quoted you the "**** off" price.
The first thing I would do is determine if the compressor is kicking on at all, you could just be low on refrigerant. That still indicates a leak, but certainly much cheaper to diagnose and repair.

 

To determine if the DPS is the problem is very simple.

With the car cold start it up and turn on the AC. Now pop the hood and check if the fan is blowing on low. You can tell with your hand of any air is moving. Usually the fan is NOT running. Attached is Jaguar's TSB describing this failure and do note there are 2 DPS part numbers and when I followed this TSB I ordered the wrong DPS. There are errors in this document so BEWARE!
They do NOT interchange!

I have two extensive threads on this repair?

First here is the filter/dryer replacement. Do read this as it will save you a good bit of money as I found what the bag was and got it much cheaper. Also in that thread I wish I had changed the bottom plug under the desiccant bag because it is also a filter and will be full of powdered Aluminum. This is also documented with part numbers. Plus most compressor warranties require replacing the filter/dryer too or no warranty.
AC Dryer Bag Replacement

Next read my DPS story here;
AC Compressor and DPS Valves

After all the work I did which required removing the AC compressor twice is this. Save yourself or your mechanic a lot of work and expense and just change the entire compressor. Now you have a warranty and it will come with the correct DPS valve installed. Again please note there are a HUGE amount of counterfeit parts out there and I have been burned multiple times now.

I know this is a pain but without a picture of the sticker on the side of the compressor I would not order anything.
Here is what my 2014 XJR had;



Since you and I have a 2014 I will mention the next bit of confusion? Note the compressor tag states both R134a and R1234yf refrigerants. 2014 was somewhat a transition year and you might have either one. I am VERY glad I have the older R134a because the cost is so much less.

About 4K miles on the finished repair and the AC is stone cold and working great.

Short version? With 75K miles on the car just put a new compressor in with a warranty and be done with it. I got the factory Sanden one for under $400. Again be VERY cautious of using off brand compressors as there are a million of them out there and they are cheaper.

If you want a laugh check what Jaguar will charge you for JUST the compressor?
.
.
.

 

The A/C charging port near the coolant tank is a different size than one for R-134 and has a tag stating R-1234. Not sure what the benefit of R-1234 is compared to R-134.

 

As usual Clubairth has very valuable knowledge & experience of being there & doing that. The links he's sharing should get into more than you need for deep insight to the system.
One side note from my personal experience, I used Four Seasons compressors and Nissens condensers in my own experience, and they are working great on both my wife's 2012 XJ and my 2012 Range Rover (with R-134)
Perversely the introduction of newer freons are supposedly to be cheaper than what they replace, but it doesn't seem to work as described.
They are two different freons and two different systems - do not try to mix them.
Freons change supposedly for environmental impact reasons, but in the last couple decades it's gotten out of control and beyond reasonable practicality.
But the bottom line is that yours is R1234.

 

This sentence is one of those times you can tell a shop is full of crap:

"their solution was to replace the Compressor, Condenser, Dryer and Expansion Valve at $4,400. The shop claims that the Compressor is failing, contaminating the rest of the system."

If it was true that your compressor blew up internally and was circulating debris throughout the system, then you would need a new evaporator as well because modern evaporators have much smaller channels which means they cannot be flushed like the old days. So they would be recommending a $4,400 repair that would cause the system to fail again in a short time.

Either they don't know what the hell they are doing, or they are scamming you.

 

In the end, I let a shop replace the A/C compressor and Condenser. Took two months to get VIN compatible parts. Closest Jag dealer was in Baton Rouge, Louisiana and they are no longer a Jaguar Dealer instead only servicing Land Rovers. Finally have cold air again, however, the settings indicated for the Temperature Control knobs now reads in Centigrade rather than in Fahrenheit as before. I foolishly thought that I could refer to the Climate Control section on page 75 of the owner's manual for instructions on how to change the setting. So, how do I change this?

 

It's in the service menu under display settings. RH side of the main IP. Second option from the bottom.
.
.
.

 

Clubairth;
Thank you for that. Worked on the first try.

 

Hey your very welcome and it is buried pretty good!
.
.
.