AirRick

Okay i have what appears to be a somewhat common problem. No heat on the passenger side of my 2003 es300. I have searched and searched and can not find what i need. I have checked what I believe to be all the servos and they all work. There is one on each side that controls the temperature it appears and they both move. The outside air servo works and the mode servo works. Do you think its the climate control unit itself? Pretty much everything I have found is how to fix the GS. It all appears to be similar. Hopefully i have just missed something simple. Any help would be much appreciated. Thanks in advance.