I just got a 87 Samurai that had a mouse nest in the heater box. I got that all cleaned out and have heat now. But when its on defrost only (controls are frozen and I have them unhooked) I get cold air out of the dash vents and hot air out the defroster vent. On the controls it does not show defrost and vent at the same time.
I know that heat DOES NOT come out of the dash vent. But its blows air all the time.
What is messed up and where? I don't like cold air blowing on my hands.

It has a plow and we have snow on the way (or so they say

).
Thanks