Hi!
So here is another issue with my s type's air system, that ive only encountered this winter.

Im setting the temperature to a high value, lets say almost maximum, both sides, not dual:

-Driver side blows hot air, while the passager side always blows cooler air, still warm, but cooler.
-On a cold start driver side blows warm air very quickly, and the passager side blows cold air until it really gets heat up.
-Even if i hit the throttle so i can run that coolant faster in the system, the passager side will be cooler that the driver side. Yes, it will blow hot air, but not as hot.

DCCV is one year new.
could it be the matrix stuck? if so i will flush it.
Could there be some other stuck blend door motors?

thank you

 

Failed DCCV?

Probably damaged module...

 

I tested the circuit again as the online guide on jaguarclimate website. All good

The module i changed at the same time as the dccv... but who knows.

i think i will flush the matrix in reverse. Maybe i can clear the possible gunk

 

What happens when you increase the temperature setting until HI is displayed? That bypasses most automatic features and is very helpful for troubleshooting. Sounds like you’re only trying automatic mode. See post #2 here for more details:

https://www.jaguarforums.com/forum/s...ol-how-185002/


If everything behaves in manual mode (HI), most likely a duct discharge temp sensor is bad. More details in post #3 at the link above.

I don’t think your control module has failed. When that happens, the typical response is full heat all the time, no matter what you select. This is by design, with the DCCV innards spring-loaded open, so you’d still have warm air to the defroster for safety.