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Got it last month with a very low milleage, which is the reason I still want to keep it even though the aircon / heating do not work. It just keeps blowing air from outside but no matter what temp you set, it will just blow outside temperature. The dealer claims he had it checked with 2 jag specialists but nobody was able to find what the problem would be (how can this be possible I am wondering? )
They bought a new heating control unit and checked it and no difference. Also they replaced 3 motors to new ones (which only made all the fans to blow. They were randomly stopping. Now all fans are working, but the temeperature adjustment isn't working. Before the replacement of the motors, I had the cold air blowing 1 time only at random time.
Ayone having any idea what would it be?
update: now while driving, the windscreen fan changed sound, like something is blocking the air, and there was no air coming out, also the 2 middle fans were not blowing as well, and side ones were - but lower than usual.
But again, this is the 2nd problem out of 2, the main one being no cold no warm air
I can tell you what I found with my system; I had to dismantle the whole dash down to the firewall to replace a leaking a/c evaporator. Whilst doing this, I found that the dash had previously been apart- presumably for the warranty replacement of the leather top. The person who did this job had not correctly reassembled it, such that a couple of the levers operated by the various stepper motors were not in their tracks, so the flaps of the a/c system were not all being operated. Putting it all back together properly resulted in the face vents blowing air for the first time since I bought it. I wonder if something like this might be the cause of your trouble.
I'm assuming that all Jags in all countries have an electric pre-heater installed, this is to get heat into the cab until the engine warms up, I guess this helps the diesel engine rather than petrol, but assue all models have this.
If this heater gets a fauit it interfers with the cars lin bus & all sorts of strange things happen. It's simple to disconnect the pre-heater to see if this is the issue, just pull the red wire off the pre-heater & see what happens.
I can tell you what I found with my system; I had to dismantle the whole dash down to the firewall to replace a leaking a/c evaporator. Whilst doing this, I found that the dash had previously been apart- presumably for the warranty replacement of the leather top. The person who did this job had not correctly reassembled it, such that a couple of the levers operated by the various stepper motors were not in their tracks, so the flaps of the a/c system were not all being operated. Putting it all back together properly resulted in the face vents blowing air for the first time since I bought it. I wonder if something like this might be the cause of your trouble.
I got booked with a good mechanic for next Tuesday. I will suggest to him to look into this, sounds very close to my issue.
UPDATE: The warming works! I dont know if it works properly, though, but I was driving at night and tried to put the temperature up to 26 degrees (A/C off) , and it started blowing warm air. So I said, OK, half is working then, only the a/c remains to be looked into. Now, yesteray I was driving back home and noticed that the dashboard fan stopped blowing, also the face ones too. Though I could hear action of blowing inside the dash. Hopefully the guy finds the issue on Tuesday.
Preheat is only use on diesels because diesels don’t make much heat or as much heat as a gas engine
to start off I’m not sure what the XF heater and air conditioning system looks like but seeing as Jaguar is pretty well set and its ways and uses the same system on multiple models I’m going to assume that it’s similar to my 06 STR. This could be completely wrong but that’s the assumption I’m going with it this morning
so question number one is the air conditioning compressor clutch pulling in and engaged when you set it to AC? Start the car turn the AC on and set the temperature to the lowest temperature possible. open the hood and look down at the air conditioning compressor Pulley and clutch. Is the clutch is engaged? you’ll see the center part of the pulley (the clutch) spinning with the pulley. If it’s not engaged you’ll see the The clutch is not turning but the pulley is rotating around it
if the clutch isn’t pulling in you’ll never get AC and then we’ll have to troubleshoot why that’s happening
if the clutch is pulling in that means your system has enough charge to operate the air-conditioning unit so now we have to find out why it’s still warm
You should see three heater lines going into the firewall to the heater core with the AC on full blast set to the lowest temperature possible start the car and let it warm up and take a field of those three lines going to the firewall. If one is hot and the other two are cool then you’ve got a real brain buster. But if you see that all three lines are hot then you’re simultaneously sending hot engine Coolant into the heater core well your air conditioning is trying to make it cool with the evaporator core so the result is normally warm air as the heater and overrun the air conditioner. But if that’s the case then it really looks that the heater valve is malfunctioning and if that’s the case we have to troubleshoot the photo the reason behind it
after looking at this document http://jagrepair.com/images/Training%20Guides/711-JAG_Noted_04_12.pdf Everything that I just written is wrong.
looks like you have a clutchless compressor which is electronically controlled and you don’t have three lines going to your heater core you only have two and your temperature is set by various blend doors directing air through the evaporator and or heater core to get the desired temperature.
So with your blender activity being all jacked up I’m starting to think that you’ve got some bad sensors someplace but I’d have to do a lot more reading to figure out how the system decides what it wants to do before I could tell you we should go look at. But in any case the document that I’ve linked should help anybody that you bring it to who will troubleshoot your system
Preheat is only use on diesels because diesels don’t make much heat or as much heat as a gas engine
to start off I’m not sure what the XF heater and air conditioning system looks like but seeing as Jaguar is pretty well set and its ways and uses the same system on multiple models I’m going to assume that it’s similar to my 06 STR. This could be completely wrong but that’s the assumption I’m going with it this morning
so question number one is the air conditioning compressor clutch pulling in and engaged when you set it to AC? Start the car turn the AC on and set the temperature to the lowest temperature possible. open the hood and look down at the air conditioning compressor Pulley and clutch. Is the clutch is engaged? you’ll see the center part of the pulley (the clutch) spinning with the pulley. If it’s not engaged you’ll see the The clutch is not turning but the pulley is rotating around it
if the clutch isn’t pulling in you’ll never get AC and then we’ll have to troubleshoot why that’s happening
if the clutch is pulling in that means your system has enough charge to operate the air-conditioning unit so now we have to find out why it’s still warm
You should see three heater lines going into the firewall to the heater core with the AC on full blast set to the lowest temperature possible start the car and let it warm up and take a field of those three lines going to the firewall. If one is hot and the other two are cool then you’ve got a real brain buster. But if you see that all three lines are hot then you’re simultaneously sending hot engine Coolant into the heater core well your air conditioning is trying to make it cool with the evaporator core so the result is normally warm air as the heater and overrun the air conditioner. But if that’s the case then it really looks that the heater valve is malfunctioning and if that’s the case we have to troubleshoot the photo the reason behind it
looks like you have a clutchless compressor which is electronically controlled and you don’t have three lines going to your heater core you only have two and your temperature is set by various blend doors directing air through the evaporator and or heater core to get the desired temperature.
So with your blender activity being all jacked up I’m starting to think that you’ve got some bad sensors someplace but I’d have to do a lot more reading to figure out how the system decides what it wants to do before I could tell you we should go look at. But in any case the document that I’ve linked should help anybody that you bring it to who will troubleshoot your system
That's priceless effort, thanks a million for your time. I will save this and use it as reference. Much appreciated!
So, went to the mechanic. In less than 2 hours he spotted there was no refrigerant . He filled it, tested and cold air was going as it should be. But he spotted that the condenser is leaking so we organise a replacement. BUT this only sorts my problem with the A/C cold air. While driving I can still notice the Climate System is not working properly. So, when I start the car after a while ( I guess I can say after it cools down for a while) the climate system will work as it should. Windscreen, face and legs buttons are normally adjusted when presse, and warm temperature blows OK when set to higher temperatures. BUT! After a few minutes of driving ( sometimes 5 or sometimes even 1 hour. very random ) the system will start "glitching" . No matter what setting I choose, it will not listen. I press the wibndscreen fan OFF and it stays ON ( also the screen button turns ON itself after I press to switch it OFF) the face and legs, no matter what I press, all the fans will continue blowing in the way they were at the beginiing. No matter what temperature I set, nothing will change. After I stop the car, it would normally take about half an hour, cools down and when car back ON the climate will operate as it should be.
Does it still sound like the tracks aren't properly alligned? Or it sounds like something is overheating and the operation becomes uncontollable?
Originally Posted by POD XF
I can tell you what I found with my system; I had to dismantle the whole dash down to the firewall to replace a leaking a/c evaporator. Whilst doing this, I found that the dash had previously been apart- presumably for the warranty replacement of the leather top. The person who did this job had not correctly reassembled it, such that a couple of the levers operated by the various stepper motors were not in their tracks, so the flaps of the a/c system were not all being operated. Putting it all back together properly resulted in the face vents blowing air for the first time since I bought it. I wonder if something like this might be the cause of your trouble.
Did you check if a pre-heater is fitted to your model??
I think it fixed the electrical part of the problem. The caps started closing and opening properly. Will drive it for a day today and get back to you with my feedback. Why did I not pay attention to your previous message earlier... I was in rush and panic that time and missed it. :/
The funny thing is that I fixed this problem and created a new problem ) I accidentaly touched the "hose" and it became now loose..And air isn't going through it anymore... Is this something that could be fixed just by taking the dash off?
Remove the screw visible in your picture and take out the air duct. You can then see how to re-install it. Maybe it's been removed before and not put back correctly?
John Williams thanks for that TSB and interestingly it states that some cars still have an AC clutch and be sure to check that it's turning. They did not identify which cars still had a clutch though?
Also found out about the shear pulley. Interesting idea since the compressor now has no clutch (Most Jaguar's anyway?) and is always turning. If the AC compressor locks up which can and does happen then the pulley would stop turning burning up the belt. With the shear pulley it shears internally when a lock up occurs. Then the AC compressor functions merely as an idler pulley until you can replace the AC compressor.
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Ok, running the car for the 3rd day now with no Aircon issues. After 3 months of investigating, this issue is finally sorted. Thank you very much John Williams!
An exact same issue can be found in this topic here and I can see the guys are saying that the pre-heater can be programmed instead of being replaced. Anyone has any clue who doers such kind of programming?
XF 2013 - Heating and A/C act weirdly
) I accidentaly touched the "hose" and it became now loose..And air isn't going through it anymore... Is this something that could be fixed just by taking the dash off? 
