Only blowing hot air on drivers side
2005 2.7 V6 diesel SE.
Not the touch screen. As title says, the driver's side of the climate control blows maximum hot air regardless of settings passenger side seems to work ok. It gets too hot on my feet! I have done the flap reset procedure multiple times. I think I can hear all the flaps moving...but not sure of the temp mixing one.
Does my car have the DCCV and if so where is it?
Is there a control module and if so where is that.
i know it sounds stupid but I'm the only person in the car. So is it possible to swap the passenger and driver temperature valve over rather than having to replace anything?
Any trouble shooting or ideas gratefully received!
Stephen
Not the touch screen. As title says, the driver's side of the climate control blows maximum hot air regardless of settings passenger side seems to work ok. It gets too hot on my feet! I have done the flap reset procedure multiple times. I think I can hear all the flaps moving...but not sure of the temp mixing one.
Does my car have the DCCV and if so where is it?
Is there a control module and if so where is that.
i know it sounds stupid but I'm the only person in the car. So is it possible to swap the passenger and driver temperature valve over rather than having to replace anything?
Any trouble shooting or ideas gratefully received!
Stephen
Use the search function.
Read through this thread, Karl put lots of effort into helping with any HVAC issues:
https://www.jaguarforums.com/forum/s...ol-how-185002/
Read through this thread, Karl put lots of effort into helping with any HVAC issues:
https://www.jaguarforums.com/forum/s...ol-how-185002/
Yes, I'm not familiar with the Diesel, but believe the DCCV is in the same location as other models: Buried between the right front wheelwell and the radiator.
For cars without the nav screen, the heat/AC panel is also the control module.
Please read through the troubleshooting guide, previously linked. Pay special attention to post #2, detailing how to test the DCCV. If bad, and it sure sounds like it has failed, resist the temptation to throw another module at the problem. On 2003+ cars, a problem with the DCCV can damage the control module. You run the very real risk of damaging the replacement module. It's such a common problem, there's a guy who runs a small side business repairing the modules and upgrading them to prevent repeat damage:
https://jaguarclimatecontrol.com/diagnose/
Most likely you will need to replace the DCCV. Be sure to get a quality brand, such as Bosch or Motorcraft. Stay away from the $39 specials on eBay.
I don't know if this is feasible on later models, but I was able to replace just the DCCV internals on my '02. This method was a LOT easier than replacing the whole assembly:
https://www.jaguarforums.com/forum/s...repair-251854/
You might be able to jury rig something on a temporary basis, but I would not recommend this long term. Even if the system were dumping heat only on the passenger side, it would eventually roast you out of the cabin, especially in the summer. If you still want to do this, follow the two lines from the DCCV heading aft to the firewall. See if there's enough slack to swap these two hoses.
Instead, you could clamp off the line supplying the driver's side of the heater core. You'd still have controllable heat output from the other half. However, I would not recommend leaving the line clamped off like that for too long, as this may damage the hose. I'd be more incline to disconnect the hose, fit a plug inside, and then reconnect it. If you do fit a plug, make sure to figure out a good way to remove it down the line.
For cars without the nav screen, the heat/AC panel is also the control module.
Please read through the troubleshooting guide, previously linked. Pay special attention to post #2, detailing how to test the DCCV. If bad, and it sure sounds like it has failed, resist the temptation to throw another module at the problem. On 2003+ cars, a problem with the DCCV can damage the control module. You run the very real risk of damaging the replacement module. It's such a common problem, there's a guy who runs a small side business repairing the modules and upgrading them to prevent repeat damage:
https://jaguarclimatecontrol.com/diagnose/
Most likely you will need to replace the DCCV. Be sure to get a quality brand, such as Bosch or Motorcraft. Stay away from the $39 specials on eBay.
I don't know if this is feasible on later models, but I was able to replace just the DCCV internals on my '02. This method was a LOT easier than replacing the whole assembly:
https://www.jaguarforums.com/forum/s...repair-251854/
Instead, you could clamp off the line supplying the driver's side of the heater core. You'd still have controllable heat output from the other half. However, I would not recommend leaving the line clamped off like that for too long, as this may damage the hose. I'd be more incline to disconnect the hose, fit a plug inside, and then reconnect it. If you do fit a plug, make sure to figure out a good way to remove it down the line.
No, if installing a used unit, it should be plug and play, with the required software already loaded. Brand new units probably require software to be loaded. Since you have a Diesel model, your options may be restricted. Some Diesels had an optional combustion heater and I think a replacement module would have had to have been previously programmed to match your car's configuration.
Others have installed used modules with good results. Please see my previous comments about the strong possibility of a failed DCCV damaging the replacement control module. Be sure to first figure out why the DCCV is not working properly before trying another module.
@stephen44, your signature shows you're in the UK with the image of an X308. Which of the vehicles are you gathering information on? This forum is for the X200/X202.
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@stephen44, your signature shows you're in the UK with the image of an X308. Which of the vehicles are you gathering information on? This forum is for the X200/X202.
must be my old piccy..s-type now..I'll change it..ty
For anyone, knowing the answer, but not what the question above is:
CCM: Central Control Module
DCCV: Dual coolant control valve.
...but which "burned tracks" (presumably of a circuit board (PCB, if an abbreviation sounds better) of the CCM), the question is about, I do not know either, as this is not explained in the question - missing reference...
...when asking a question on this forum, the likeliness of getting a reply is proportional to the clarity of the question...
PS: Don't shoot the messenger!
CCM: Central Control Module
DCCV: Dual coolant control valve.
...but which "burned tracks" (presumably of a circuit board (PCB, if an abbreviation sounds better) of the CCM), the question is about, I do not know either, as this is not explained in the question - missing reference...
...when asking a question on this forum, the likeliness of getting a reply is proportional to the clarity of the question...
PS: Don't shoot the messenger!
For anyone, knowing the answer, but not what the question above is:
CCM: Central Control Module
DCCV: Dual coolant control valve.
...but which "burned tracks" (presumably of a circuit board (PCB, if an abbreviation sounds better) of the CCM), the question is about, I do not know either, as this is not explained in the question - missing reference...
...when asking a question on this forum, the likeliness of getting a reply is proportional to the clarity of the question...
PS: Don't shoot the messenger!
CCM: Central Control Module
DCCV: Dual coolant control valve.
...but which "burned tracks" (presumably of a circuit board (PCB, if an abbreviation sounds better) of the CCM), the question is about, I do not know either, as this is not explained in the question - missing reference...
...when asking a question on this forum, the likeliness of getting a reply is proportional to the clarity of the question...
PS: Don't shoot the messenger!
i thought it was such a known problem....when the dccv fails it tends to take the ccm with it via burnt out circuit board traces.
i just wanted a picture of which traces.
p.s. CCM is climate control module not what you said
DCCV is dual climate control valve and again not what you said.
please note i did refrain from shooting the messenger!🤣
Last edited by stephen44; Mar 22, 2025 at 10:36 AM.
Have just a quick minute today. Take a look here:
https://jaguarclimatecontrol.com/
Look through the links at the left of the page. I think one shows the damage.
https://jaguarclimatecontrol.com/
Look through the links at the left of the page. I think one shows the damage.
They can fail at different places a bit like a chain can snap in more than one place.
If only a driver transistor (or the like) blows you may not see any damage, but on these boards it tends to be PCB trace(s).
If only a driver transistor (or the like) blows you may not see any damage, but on these boards it tends to be PCB trace(s).
I need a new valve, but i'm confused as to which one I need. Hopefully someone can help.
2005 (facelift) 2.7 diesel auto
I can't even tell whether I need a three or five pipe valve.
Want to have the correct one before I rip into the car as it's needed on a daily basis.
i realize I might need a climate control model repaired as well.
Thanks
2005 (facelift) 2.7 diesel auto
I can't even tell whether I need a three or five pipe valve.
Want to have the correct one before I rip into the car as it's needed on a daily basis.
i realize I might need a climate control model repaired as well.
Thanks
OEM part numbers can be found here:
https://parts.jaguarlandroverclassic...-s-type-parts/
Go to the AC/Heating/Ventilation section, then Pipes/Hoses. For the early models (no Diesel yet?) I'm seeing a 5 port valve. Later gas models show a 3 port valve. But the Diesel models show a third part number that appears to have 5 ports, like the early gas models:
XR843549
I hope this does not turn out to be a very rare component. I have no idea if the common early gas version can be used instead.
Be careful searching online with any OEM Jaguar number. There are many cheap brands that advertise they will interchange but have poor reliability. Stick with OEM or a quality name brand such as Bosch.
https://parts.jaguarlandroverclassic...-s-type-parts/
Go to the AC/Heating/Ventilation section, then Pipes/Hoses. For the early models (no Diesel yet?) I'm seeing a 5 port valve. Later gas models show a 3 port valve. But the Diesel models show a third part number that appears to have 5 ports, like the early gas models:
XR843549
I hope this does not turn out to be a very rare component. I have no idea if the common early gas version can be used instead.
Be careful searching online with any OEM Jaguar number. There are many cheap brands that advertise they will interchange but have poor reliability. Stick with OEM or a quality name brand such as Bosch.

(Check the tail pipes and, if you can, the FBH exhaust. FBH=fuel burning heater, fitted to provide heat sooner than the diesel engine does.)
2.7 diesel auto.Drivers side blows hot air only. CCV & DCCV swapped and no change and tried to follow epic troubleshooting doc. My question is where is the drivers side temperature sensor and anyone know the part number please.










