Right now, the A/C is blowing cool air out of the center dash vents and red-hot air out of the outboard vents. But it's also blowing red-hot air out of the rear A/C vents, the transmission tunnel gets hot as heck when the A/C is on and I think the floor vents are also spewing hot air.

I'd finally had enough tonight and decided to shut off the A/C unit entirely and ride with the windows down instead, and noticed there was an awful lot of hot air coming out around my feet.

I've got a new DCCV ready to install Tuesday, and I've lined up someone to take a look at the climate control module if it is also fried. But does this sound to anyone like there might be more to the problem?

Jess

 

Jess, I have the same issue with my 03 STR's vents. I replaced the DCCV yesterday because it seems to be the "hot" (no pun intended) idea...no change/resolution. The DCCV focuses on wether there is heat vs cold coming in not wether there is cold on one side vs heat on the other side. I've come to realize that cold vent one side-hot vent the other require a repair or replacement of either the temp. sensors or control module.

 

Thanks for the response -- I just wanted to call your attention to one thing: I don't have hot on one side and cold on the other. I have cool in the MIDDLE, and hot on the OUTSIDE vents, the ones nearest the windows. And the "cool" air in the middle is just barely cool. The A/C is fighting to overpower the hot air, and it's losing.

When you first crank the car up during the day, the A/C is pretty cold. But as soon as the engine approaches operating temperature, that's it. Everything gets hot.

Jess

 

You still described sort of the same thing I and others experienced. If you have only cold vs heat then: DCCV. If you have a mix of heat and cold then: temp. sensor or temp control module. Brutal suggests pinching the hoses coming off the DCCV with a vice grip and if just cold then DCCV is likely culprit.

 

See if this information woll help http://jaguarclimatecontrol.com/

I recently did a little work on my system and documented what I did. It might help http://www.gusglikas.com/AutoRepairAC2000SType.htm

 

Hi Gus,

Those are really nice write ups. You are right in that DCCV failures can cascade to cause other problems. In my case the DCCV failure fried my Air Conditioning Control Module (ACCM). Both were fixed under warranty. Luckily for me, this happened in the dead of winter so it wasn't that bign of a deal and I had my car fixed at my convenience.

For those of you whose cars are out of warranty and are fairly handy here is a link for fixing the ACCM.

https://www.jaguarforums.com/forum/s...control+module

 

Update from 9-7:

Changed the DCCV, no change in status. Car still blowing hot from the outboard vents, cool from the centers.

Jess

 

you might want to get ahold of forum member jaguarclimatecontrol, he seems to know his poop!

Whoopsy, just re-read Gus's post

 

I would go after the sensors next. I replaced all the sensors in the evap unit as a precaution on my 02, since I did have a minor temp variance.

Each sensor is $21 at the dealership.

There are a total of 3 sensors in the evap unit 2 on the sriver side 1 on the pass.

Drivers side: lay on your back on the floorboard and look behind the console under the dash, they are an offwhite with a plug with 2 wires.

Remove and spray MAF cleaner on them mine were uncrusted with crap so I replaced them.

Pass side:
Remove everything out of the glove box. remove the tensioner aka soft open rubber band looking thing, its a loop and attaches to the glove box on a post.

once you drop the glove box you can fit your hand and feel the other sensor remove and inspect and spray with MAF cleaner.

I couldnt figure out how to remove the sensor thats above the key but I sprayed that with MAF cleaner ( WARNING: MASK EVREYTHING OFF ON THE DASH NEAR THAT SENSOR ABOVE THE KEY. IT WILL DAMAGE THE DASH.)

And voila my temp variances were magically gone.

 

Mafioso,

Thanks for the idea. One follow-up on your instructions for the driver's side -- when you're discussing the driver's side sensors, will both be visible while you're lying down looking up?

Jess

 

Yes, one is by the accelerator pedal the other one is about 4" up into the dash.

you need a small flathead to push in the clip to slide the sensor out.