Sometimes when driving the ac will go warm. Then it will correct itself, any idea what this could be.
Over 200k miles on same ac, how long do they usually work. Could it be something minor ?
es350 2008

 

As always with AC systems you need to get the diagnosis done first. It could be several issues so either get a set of AC gauges or go to an AC shop to get the system tested. It could be low on freon or it could be a blender door problem or a sensor. Systems today are more complicated then the early days so have someone look at it. They can give you a price.