I have a 2001 Volvo S40 1.9L. My heating and air conditioning (which is a climate control) has trouble switching from hot to cold and from cold to hot. The way I deal with it is to set temp to where I want it and within a week or two it will finally change over. The fan and direction all work, just the temperature has the trouble no matter where on the dial I set it (anywhere on the hot side or anywhere on the cold side). I have checked fuses but that is about it. Any suggestions would be much appreciated.

 

Do you have manual or auto climate control?

 

It is an auto