Jaguar XKR 2010 - 35000 KM, 36C temp outside.

The blower works (hot air), the AC is on on the LCS, but no cold air.
The speed was snail like.

After a while, I had the opportunity of high revs and I could feel some cold air from the vents, but not as it should be.

What can it be?
I have an appointment to the ******* next week

 

I just had the same issue, the blower was working but the compressor was very obviously not working as hot air would blow out.

If I revved the car eventually cold air would come out, other times when at a stop the air would get hot and then cold when I was driving.

Bottom line for me was that they had to replace the compressor. I have a CPO vehicle so it was covered, if not it would have been $2000 or more supposedly.

 

2000$ it will ruin my mood

 

Maybe you only need a refrigerant recharge, muuuch lower cost.

 

..But first you would need to find out why the original refrigerant is no longer in the system. In other words...find the leak first. Then fix the leak. Then recharge. Then enjoy cool air once again....aaahhhhhh

 

Primary components of the A/C system are:
Evaporator (behind the heater core in your cabin)
Expansion Valve
high pressure line
low pressure line
Compressor
Receiver/ Drier
refrigerant pressure sensor
High pressure service connector
Low Pressure service connector

Then there are a series of sensors that feed data to the automatic control temperature control module that help trigger on/ off function.

I'm guessing your not a DIYer, which is fine. There are far too many components in the A/C system to help guide you if your not doing your own repair but there only really a couple of checks you can do without a mechanic.

Fuse F6 in the central control box sends power to the automatic temperature control module.

Make sure the Economy Mode is not on. (well duh on this one)

Locate the compressor in your engine bay, she sits low on the serpentine belt. Google it to see what it looks like. They all look similar. It is belt driven so if you follow your serpentine belt, you'll find it. Have a partner start your engine let it warm up with the A/C off. Watching it (AND FOR THE LOVE OF GOD KEEP YOUR HANDS CLEAR AND REMOVE YOUR TIE. THIS IS A VISUAL INSPECTION ONLY) have someone turn on the A/C (turn off the Econ button and set the temp to 62. Set the fan on high. You will see the compressor clutch "kick in", and you will likely hear it too.

If it doesn't kick in, there are several reasons why and not necessarily a bad compressor.

If it does kick in but no cold air, the MOST Likely problem is a leak and you need a recharge.

Spend the money for a leak check and have the leak repaired first. These are sealed systems and should not leak.

A lot of folks just add refrigerant bought from a local auto parts store and if they get cold air, think their problem is solved....

 

Yeah, that would be a kick in the jimmy, but like has been said there are a bunch of things that can go wrong in the AC system. Once you have it checked I hope that it ends up being something minor!

 

Thank you, I'll keep you in the loop!
I did not find any "Economy mode" in my XKR.
I only have AC ON/Off.

 

The compressor clutch?

 

That is what I suspected was my problem, they replaced the entire compressor under cpo so I didn't challenge if it could be fixed. I could kick start my compressor with a hard rev, if the police stopped me for ripping away at lights I am sure they would understand that I needed cold air.

 

The "economy mode" mentioned refers to cancelling the use of the compressor to obtain refrigerated air while allowing the rest of the climate control system to function, providing heated or ambient temperature as as necessary. This is accessed on the touch screen climate control setting and it is probably what you refer to as "AC ON/OFF".

 

Comment removed. I thought RedRider was asking for an explanation of the compressor clutch but after re-reading, it appears he may be suggesting it's the problem.

 

Yes, my apologies. I should have asked as a proper question. My comment was, as you surmised, suggesting a bad compressor clutch.
All mute now, after the fact.
Happy Trails...

 

Well, it's the A/C compressor, no more pressure.
Replacement and parts about 1200 USD.
I've ordered the parts, I hope I will have the car Monday or Tuesday.

P.S. There is a way to repair (as spare part) the damaged compressor?

 

That makes sense also, I always figured it was a clutch issue and the rev would kick it into engaging. But a low pressure I suppose could be the same, on a higher rev it is getting more pressure, still not what is required to operate 100% but enough to get some cold air?

Have to await those that know compressors to say whether it can be rebuilt.

 

Yes you can rebuild A/C compressors. Seal kits are available. Typical seal kit for an American vehicle compressor is about $50 U.S. I don't know the cost of our specific models. You can outsource a compressor rebuild also. Just google it and you'll find vendors. But you'll need to contact them for a quote. DIY, typically not a big deal depending on your skill set. Time and work space is important. You don't need any unique specialty tools.

 

there can be another reason… The valve is not opening… On my car technician changed the valve… But when checking data said that the radiator is not working properly and the and the system is heating. I guess there is a constructual issue with the position of the radiator

 

I'm guessing that Nosferatu's a/c was fixed many years ago. However, which "radiator" are you referring to? The XK's have a powerful cooling system so there is definitely no structural issue.

Richard

 

Could be air trapped, failed coolant pump, thermostat or a clog.