i own an is300 2008 model the comprosser do engage no ac problem codes whatsoever the thing is it never works when it's hot outside only works sometimes at night and when it does i have to make the fan blow at max so it blows constant cold air is the compressor worn out ?

 

Your A/C system may have lost its charge of refrigerant. This is probably the most common cause of a no cooling problem. Another possible cause of no cooling may be that your A/C compressor is not engaging when you turn on the A/C. This can be caused by an electrical fault in the A/C compressor circuit or the magnetic clutch that drives the compressor. Another cause could be an internal obstruction inside the refrigerant circuit that is preventing refrigerant from circulating inside the A/C system.
If your A/C system is low or out of refrigerant, check for leaks, then have the A/C system vacuum purged to remove the air. After the air is out, it can be recharged with the specified amount of refrigerant. It is important to get any air out as this will reduce cooling efficiency and may make the compressor noisy.

 

It does engage and I tried refilling the freon it blows cold air but only if it's cold outside and i have to leave the blower at max to stay blowing cold air and one more thing when it's hot outside sometimes when i push the car very hard and shift at 6000 rpm it does work

 

Any help guys?

 

Stupid question, do you have the actual A/C button turned on? Not just the fan blower, but the actual A/C?

 

the a/c button is working the touchscreen shows that it's working i think it's has to do with the heatwhen it work it's mostly in night time sometimes it does work randomly if I'm lucky other times i have to shift almost at 6000rpm to start getting cold air

 

One more thing i live in a hot area it gets to over 120 f in the summer

 

I had similar behavior with my heater caused by a failed radiator cap (fell apart inside of the radiator) that lead to air pockets in my coolant and low coolant. Might be worth checking the inside of your radiator cap and overflow coolant level when the car is cold. (Search for the issue on here for details, also let the car cool for a few hours after driving before taking off the cap.) Low coolant could also be caused by a leaky water pump or evaporation over time. If it is low, look up how to burp the system after adding coolant to get rid of any air pockets.

 

Radiator cap is fine and no leakes from the coolant can it be my compressor is dying ��