Hey Guys and Gals.

I have been fighting an issue with my Grandmas S-type now for about a week. It came in not blowing hot or cold air just ambient temp from all the vents. I pulled and tested the DCCV and found it to be bad and replaced it with a new Bosch unit. Now I have Sahara Desert wind coming through the vents but no cold air. I have also checked the pressures of the A/c system and can hear the Clutch engage when the A/C is switched on.

I have been running around in circles trying to repair this issue. I have done a search and read through as many different threads as I can, I have also followed the diagnosis procedure outlined by jagclimatecontrol.com (DIY: Diagnose It Yourself - JaguarClimateControl.com), as well as found the Jaguar TSB JTB00103.

Following the JCC method I tested the 3 Evap core sensors for resistance and came up with these numbers:

Driver 1: 25.1K ohm
Driver 2: 20.8K ohm
Pass : 24.8K ohm

I also backprobed some wires on connector FC5. The brown/green wire (NG; FC5-11) and the brown/blue wire (NU;FC5-12). These are the values I got with KOER and A/C set to LO:

FC5-11: 110.4mA, .27v

Driver vent temp: 87.0*F
Center Vent temp: 87.5*F
Pass Vent Temp: 81.0*F

FC5-12: 115.2mA, .27v

Driver Vent Temp: 87.1*F
Center Vent Temp: 87.5*F
Pass Vent Temp: 82.0*F

With the DATC turned up to HI both wires show 13.3v with KOER and I get drastically higher temps upwards of 130*F out of the Driver and Center vent but I saw only ~95* from the Pass vent.

I initially thought that the mode doors were to blame but after som testing I noticed I could hear them moving but that's not to say that they aren't getting full travel. So I have come to you all hoping for a new direction so I can fix this damn thing its starting to get real hot here and I want to make sure my Grandma has some cold air in her car.