From the experiences posted on this forum with leaking and/or failed DCCVs, if you don't replace it pronto you run the risk of burning out your Climate Control Board in the dash. While a new DCCV can be sourced for as little as $100 or so, a new CCB apparently goes for $1,200 or more (assuming you cannot repair your existing board as some here have chosen to do with a soldering iron and the appropriate skills for using one). So if you know your DCCV has failed, get it out of there before it fries your board....

 

Oldengineer, thanks for the info - had the battery checked - it is a bit low right now but I found a Jaguar guy in my town and will take the car in to him tomorrow to have a look at her. No one I've ever spoken to wants to touch this car under any circumstances - seems to have something to do with the "R" designation - frightens everyone away - soon as we pop the bonnet everyone blanches and backs away. Cowards.

 

Jon - It appears that has happened to mine. Drove her to work this morning - first time since she came out of the shop. With the automatic controls set on 70, the heater was putting out so much hot air I turned it down to 62. Then I got cool air out of one side and red hot air out of the other with both sides set at 62. I'll be calling the dealer tomorrow - you'd think they'd have checked for this.

Regards:
Oldengineer

 

Sorry to hear that. I agree with you - the dealership should have checked your car's HVAC system for proper operation before handing it over to you. Keep us posted, and I'm very glad you're still under warranty....

I wonder if turning off the HVAC system once you realize your DCCV has failed will prevent it from frying your Climate Control board until you can swap a new DCCV into the car....

 

I wouldn't panic just yet (more for other users in this case since you have the warranty). It may just be air pockets causing the heat temperature issues. If air is trapped in the system somewhere it very well may display the same symptoms as those that occur when the DCCV valve is not working properly. That said, since yours was leaking pretty bad it may have been failing for a while and caused the short that damages the control module. Did you have any issues with temperature differences before the DCCV was replaced? The dealer hooking it up to IDS should show what is going on. Let us know....

 

Surprised that you are having difficulty finding a shop?
What about St.Thomas or London? Kitchener or Waterloo?
That is a very populated area. I would have thought that a Jag shop or dealer would be easy to find. Maybe a European specialist who hopefully understands Jags.
Good luck.

 

London? St. Thomas? Na, na. Kitchener/Waterloo is much closer and actually has a Jaguar dealership but is mostly staffed with males who prefer to deal with other men, unable to comprehend that there are actually women around that understand the difference between a wheel and a lug nut (chauvinists perhaps). It really is my preference to stay away from the Jaguar dealerships. Their sales skills are good but service?
Cambridge does have a Jaguar specialist I managed to find and next week he'll have time to look at my lady and do a quick diagnosis of what she needs to set her right.
Could it be an ABS Module failure? The Cruise Control has to be another issue.

 

No - everything worked fine until the Sunday I backed her out of the garage and she was leaving a trail of coolant. I'm pretty sure the board's fried, because I put the HVAC on automatic today, set on 68, and the system ran the car up to about 90 inside and would have keep going, but, I shut it off. Turning it down had no effect, except to increase fan speed.

Regards:
Oldengineer

 

I’m sorry but I really, really think (well hopping) that it’s just air in the system… after recently flushing my coolant system, my car experienced the same systems as you’ve described above. I was a little concerned as my car has just under 150k and I still have my original DCCV. After confirming that all of the hoses were correctly hooked-up and that water was running through the system as normal I went back and proposed my question to the team. Luckily they advised me of the possibility of air in the system. Ok… it is a pressurized system, so that makes sense. Let’s try to bleed the system and see what happens..

Well after bleeding the system I set my clement control on 68 degrees and held the button in until it beeped twice, then I raised up the temperature setting to 85 degrees (highest it goes in mine) and again held in the button until it beeped twice.

Shutoff the car for 30+ sec and then tried it out….I don't know if I just got lucky or what, but I do know my heater works again and it cost me 0/nothing, other my time to get it working again..

Best of luck to you sir.. Please do keep us updated..

Shaun.