I have a 48 3800 with the airflow heater, but I don't see any type of temperature control. Just a fan control and a defrost redirect control. How is the temp controlled? I am tempted to add a water valve and control cable to shut off water to the core during the summer. Will this cause a problem? Am I missing some kind of controller for temperature or something, I need to drive with the windows open when it warm outside. I did read through many of the topics on heaters, but did not see an answer, sorry if this has been asked before.
