2004 Jaguar x type

My A/C is blowing warm air and I’m looking for some info on some things to check out that may be causing it so I can get it fixed. The temperature on the dash is usually wrong with the outside temperature and not sure if that has something to do with it possibly?

Any help is greatly appreciated guys. Sweating my *** off in Canada 🇨🇦 atm

 

The easiest way to check if the outside temp sensor is causing a problem is to press the blue cool button until it reaches max cool. If you get cool air then the sensor is bad.