The details are in the details feild

The thermosensor circuit is not working correctly and this resullts in the cooling coil icing up. Recheck the thermosensor location and installation. Try turning the temperature to a higher setting.

Thank you
Can you please explain what you mean by the thermosensor?
do you mean the low pressure switch? or just the temp controller switch?

one more thing, setting the temp to high doesn't prevent icing up on low fan speeds.

Not the switch. It is the sensor tht has its base plugged in between the cooling coil fins. That is teh temperature control sensor, usually called the thermostat.

How high did you set the temperature? If setting does not help, you might need to replace the thermosensor or check if it is bad and not sensing correctly.

Thank you very much, I referred to the service manual of the car which I normally use in such cases and found out that my AC system doesn't include such thermosensor

There must be a sensor to sense the temperature of the cooling air for temperature control.

In this vehicle I believe is called the inside air temperature sensor.

I will recheck and get back to you.
thank you vey much

It's not there sir, I am positive
the system depends on the low pressure transducer and tge high prissure switch attached to the compressor only. No thermistate at all
I can attach an image to prove that. but it seems that my AC system is not the one in ur mind

thank you

Is your system manual or automatic HVAC?

manual

Ok, this system uses the heater for temperature controls and attached are the procedures for diagnostics.

First of all I would like to thank you very much for your time and effort spent on this.

Secondly, it seems that you didn't get the idea correctly.

- My AC is perfect, I can say it's even colder than usual
- When the blower fan is on 1 or 2, the system begins to create ICE on the low level line and on the internal condenser, which stops the airflow and causes rise of capin heat.
- When the blower fan is on 3 or for, the speed of the blowing air prevents the ICE from being created. that's why no ice on high speed fan.
- I twice replaced the high pressure switch (within the compressor). the first time wasn't original but the second time was a GM part.

Now, I hope everything is more clear

One again thank you very much for your time and effort

Icing/frosting of cooling occurs only when it is too cold and the procedures shows what to look for.

I will follow that
thank u very much