Hello . Here again I started using my AC it's cold but both fan working only on high speed then turn off once the temperature reach 220F both fan work on high speed for about 5 minutes till the temperature go below 200F
to my knowledge once the AC on both fan should work at low speed then when temperature rise they work on high speed but they doesn't work at on low speed at all .
Is there fuse for low speed ? Could be the ac pressure switch? Other?

 

First thing to check is the cabin filter. When those get too dirty the blower motor has to work harder
to blow air into the system. When it gets to a point it will blow the blower motor resistor and the only
speed that will work is HIGH. While in there check to see that your motor is not the fault by turning the
fan blade to make sure it rotates without a lot of resistance. You will probably need to replace the blower
motor resistor but without doing the other checks it may fail again sooner than you might think.

 

I assume that you are talking about the engine cooling fans and not the cabin blowers. Cooling fan speed is determed by engine temperature and ac pressure. X308 uses pretty high ac pressure in lines that require higher cooling. Therefore in hot climate areas both engine cooling fans usually spin at full blast even engine itself is not hot at all. Hot engine bay too rises refrigerant pressure.
Pressure sensor senses the pressure level and control module(can not member which) turns fans on accordingly. Low and high speed doesn't have separate fuses. Speed is controlled via relay behind the front bumper. Does fans spin at low speed with engine only ?

 

Check the pressure switch: any green slime, you have blown it. Easy to replace. Do not overfill the system until you have found your problem -- you can blow your replacement switch (you can guess how I know). There are codes for what ever is wrong with the AC system: search AC codes X308 Jaguar.

There t'ain't no cabin filter in these . . .