Took my 03 STR to the dealer the other day because I had no heat and the air kept blowing colder and colder. This is what they found and they want about $1,100 to fix it. Can someone decipher this for me? Can I fix this myself?


"Customer states that temperature control is not working states the heat will not blow until temp is set to 82F check controls and advise - (ok 1 diag). Short in climate switching valve assembly. Inspected and verified concern. Tested switching valve. Advised switching valve needs replaced. Also advised that faulty switching valves have been know to cause internal shorts in the climate control unit and that it may needs replace as well. Recommend starting with valve assembly."


Again, they want about $1,100 to fix this and as they state advised me that the climate control may go out which they say would be another $5,500.


Any advise would be greatly appreciated.

 

Have you checked to see if your thermostat is stuck open?

 

Engine runs at 205-210F, dealer just installed new radiator 3 weeks ago. I would guess the thermostat is fine. Will blow extremely hot air when temp is set to 80F or above.


thanks!

 

They are saying it is the DCCV and potentials the CCM both well documented faults on the forum.
You can buy the valve for ~$100 maybe 2-3hrs to change you can do the maths.
The CCM needs any burnt traces bypassed again not a huge job but for 5.5k they are going to install a new one and probably a few champagne cocktails.

 

Fairly common problem, and would be a very expensive fix if it were not for these people:
JaguarClimateControl.com

In summary, the Dual Climate Control Valve (DCCV) does develop the fault described by the dealer, and if left unattended will cause a fault in the much more expensive climate control module (CCM). As you now know, those parts are costly if ordered through a dealer but, for instance, Jag Climate Control will sell you a DCCV for $150, and can repair the CCM, which burns out because of a design fault which they will also correct.

Have a good look around their website.

 

All true, but if it blows hot when set to max heat I would guess the DCCV and the module does work.

 

Could be one side is blown. Replace DCCV, inspect/fix CCM (may be RCCM). Quite cheap unless you get a dealer to do it.

 

I believe someone in the forum determined that the DCCV system is designed so that when the DCCV fails, it opens to full heat position. This would explain why the OP has full heat but no other control of the valve.

As stated above, this is a well documented problem and a search through the forum will yield massive amounts of info on the DCCV / CCM failure issues. And as Robinb states above, the most comprehensive source of off-forum info is definitely...

- JaguarClimateControl.com

 

I just got my car. My car had this valve replaced before I bought the car. I have the invoice the shop charged the dealer. It was $316 for the valve and $19 for antifreeze. Labor was $272. So $607 total. Just giving you an idea. This was an independent shop. Not the dealer.

 

Thanks for the responses everyone, looks like I know what I need to do now, I just didn't understand exactly what the dealer was saying. I'm out of town this weekend but will look to address this when I get back home.

 

Norri and Robinb sum it up clearly. Do the search and read as much as you can first.

I found an exact replacement Motorcraft DCCV (made by Bosch) for less than $100 on eBay, then had the Jag dealer install it to be sure it was done right. Saved a boatload of $$ buying it myself (as you can see from earico's post).

If you still have problems after replacing the DCCV, then it's likely that the CCM also is damaged, but the common wisdom is to always replace the DCCV first.

Good luck,
Steve