Here in Florida, A/C must be working at its optimum. I have noticed over the last few months I get an intermittent hissing sound from the vents which eventually goes away. I'm currently notice that, although when taking it out of the garage in morning, it blows super cold, as the day goes on, it's not sufficient to say the least. Some symptoms are: 1) Passenger side is definitely warmer. At an idle when getting home and not moving, I'm getting 73 out of the driver's side and way over that on passenger side. 2) I'm of course always worried about the duck bill, and check the water under the car when idling. It's wet, but should it be "pouring out"? The inside passenger floor area is bone dry as I check regularly.. Since I purchased the car 11 years ago, it always blew warm air from the a/c when I first started out even in the cooler weather. That was consistent. Now, it will blow VERY COLD in the mornings (after the initial warm air) and by the time I get home it's warmer. Before I take it to the shop, is there anything I can check on my own? Can the blender be an issue as the passenger side is warmer? Should the condensate be pouring out of the bottom? It's wet on the driveway, but there isn't a pool of water. What setting should I have the a/c on to test the optimum coolness of what it is putting out? Recirculate? Automatic? Both? None? When driving, I believe it is cooler, but then I'm moving. Any suggestions would be helpful and appreciated. Any known defects with the 2010 XK a/c systems? Should I bother with a OBD 2 reading for codes? Thanks everyone. P.S. Odometer reads 19,000 miles. PS.. I did find a TSB that affected many Jaguars (July 2016) for the Electronic Control Valve TSB # JTBOO380V6;2016 Includes all XK150s from 2010-2015

 

@bocatrip You worry too much. There's nothing wrong with your AC. If it ain't broke, don't fix it. What you need is an education, and you can teach yourself for free by watching YouTube videos. You need a basic level of knowledge about how your car's AC works. Google is your friend.

You're in Florida where it's very hot and humid outdoors in August. But your cars are probably housed in a climate controlled garage at around 75°F.

Of course, your AC is going to blow very cold when you first start the engine in your garage. But as soon as you drive it out into the sunshine, heat, and humidity, the AC begins to struggle to maintain that 73°F temperature. Why? Because it's 98°F outside, and the most you can reasonably expect from your AC is a 20 degree drop (98°F - 20°F), or 78°F.

You won't see the AC condensate (water coming out of the duckbill) until after the AC has worked long enough to dehumidify the air. You should see it puddle on the ground, but it can collect in the belly pan and run off at the lowest point.

All the questions you asked about the AC settings are in your Owner's Handbook. I'm not going to explain those settings here, because it's your responsibility to read the Handbook and learn how to operate your car. And don't worry, be happy!

Cheers!

Stuart

 

Bocatrip, if found the above post useful you can click on the button on the bottom left corner of the page.

 

Florida here..

Mines exactly the same..

 

@bocatrip Warm passenger air's usually a sign of low refrigerant as is cold air on start which slowly gets warmer. The first and easiest test's checking high and low pressures.

 

Thanks,,,,,
I read all these things since my 1st 2 were relatively new...2010 and 2015 XK

MY newbie 17 years old..2008 XK

Appreciate everyone on here!!!

 

Don't trust pressure checks, especially the gauges on the bottles from a parts store. Have a pro hook up the proper ac machine, evacuate the fluid, and re-fill with the proper weight of fluid as posted on the refrigerant sticker under the hood on top of the left fender liner. On my 07 it's 700g +/- 25g (1lb. 8.5oz. +/- 1 oz.)

 

That’s what I was referring to….

 

When I started this thread, I really hadn't driven the car many distances or on the highway in this heat. Recently, my car was baking in the sun for a number of hours. Even though I had a sun shield up, it took quite some time before the inside temperature as well as vent temperature got cold. Next time, I roll down the windows to get some of the heat out. Over the weekend and today while driving about 150 miles in 90+ degree weather, my car's temp was quite comfortable at a 72 degree setting and on recycle. Initially, today, I had to raise the temp as it was too cold starting off at 68. I believe my problem stemmed from expecting my Jaguar, sitting in the sun to blow ice cold air in a few minutes....at least a Jaguar. I'm taking my car into my Indy on Thursday for an oil and air filter change. I'll ask if he checks a/c pressures or it's a regular service. I might have prejudged my a/c, as I do find it to be acceptable and comfortable, at least when it hasn't been sitting in the sun all day.

 

Great news..

Was 108 in my car today after bowling league, no snickers please. I always hit the open door and hold to open windows to let out the hot air..

Top down, AC on, wind in my hair..

Life is good

Since getting a new battery and alternator have had ZERO issues..

Regained my confidence in my purchase....

 

As the OP I have been dealing with my a/c for the last week in Florida's oppressive heat. The system has been working at a mediocre state and the right vent seems to be warmer than the left, which certainly could be a sign of low refrigerant . My local Indy that only works on Jaguars, (old ones) told me that topping up is not the way to go, and that after checking the high and low pressures, it's best to evacuate the system and put back the exact amount that is required to avoid overfilling (if topping up was done). If the system does have a leak, it must be quite small after 16 years and still blowing fairly cold.. For the few hundred bucks, I'll give it a try in order to be able to tolerate the remainder of this summer. I'll give an update next week.