When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
When I bought the car in the winter, it didn’t blow any hot air at all.
They replaced the DCCV (Dual Climate Control Valve), and hot air appeared, but it was uncontrolled.
Then they removed the AC control unit and re-soldered two transistors that were “whistling.”
Next, they recharged the AC system — it had 120 g of refrigerant, and they filled it up to 780 g.
This worked, but now the AC blows cold air on the driver’s side and partially on the passenger’s side.
The problem is only on the passenger side: cold air blows at the face, but hot air blows from the lower vents — both at the same time! When switching to defrost (windshield mode), it blows cold air.
If the ventilation is turned completely off (OFF), very hot air still comes to feet (on both sides), and the plastic ducts that blow to the feet are extremely hot to the touch.
If I turn on ventilation without AC, it always blows hot air, even when it’s cold outside.
AC On the driver’s side everything works fine — I’d even say it’s cold.
If I drive for a long time with the AC running, after a while the cold air to the passenger’s face also becomes hot. At the same time, the air to the passenger’s feet is so hot that it’s unbearable to sit there.
Yes, also… I wanted to add: they completely replaced the coolant because the reservoir had cracked. Could this have somehow affected the AC operation — for example, air pockets in the system? By the way, I bought the DCCV on eBay, but it looked new.
I was offered to replace this part — FOUR SEASONS 73101 — it’s the airflow control actuator. I’ve attached photos of it. It’s not expensive, only $30. Is it worth replacing? How difficult is it to do?
By the way, I bought the DCCV on eBay, but it looked new.
Welcome to the forum.
As to the climate control issue, unfortunately you may discover a no-name DCCV has dismal reliability. Even if brand new, some of them are junk right out of the box.
Before trying anything else, please work through post #2 at the troubleshooting guide:
There you will see a couple of tests to confirm if the DCCV is behaving itself. It's possible you have more than one active fault, but first make sure the DCCV is working before digging elsewhere.
To add to Karls excellent advice (As always!). If you do have blend door problems they will set an error code. Don't load the part's cannon as that will be very expensive and probably won't fix the problem.
Can you get the car scanned with the Jaguar SDD system? All those blend doors and there are several in your car will set different codes.
Also I would suspect the CCM repair unless it was done by someone aware of all the problems. Did you get the over current protection installed when you had the repair done? It's well worth it because this is the root cause. The circuit board was improperly designed and has zero over current protection. A real amateur decision by Jaguar!
As to the climate control issue, unfortunately you may discover a no-name DCCV has dismal reliability. Even if brand new, some of them are junk right out of the box.
Before trying anything else, please work through post #2 at the troubleshooting guide:
There you will see a couple of tests to confirm if the DCCV is behaving itself. It's possible you have more than one active fault, but first make sure the DCCV is working before digging elsewhere.
Yes, I read that post, and I ruled out the DCCV because it gives cold air to the passenger’s face but hot air to the feet. I concluded that it’s working, since if it weren’t, there wouldn’t be any cold air — or am I wrong?
To add to Karls excellent advice (As always!). If you do have blend door problems they will set an error code. Don't load the part's cannon as that will be very expensive and probably won't fix the problem.
Can you get the car scanned with the Jaguar SDD system? All those blend doors and there are several in your car will set different codes.
Also I would suspect the CCM repair unless it was done by someone aware of all the problems. Did you get the over current protection installed when you had the repair done? It's well worth it because this is the root cause. The circuit board was improperly designed and has zero over current protection. A real amateur decision by Jaguar!
I didn’t know about the Jaguar SDD system. Thanks, I’ll probably get one and try scanning. Could you please tell me about overcurrent protection? Maybe there are some links on the forum about it? Thank you.
Air conditioner blows both cold and hot air
