Listies.

I have a 1990 Westy Multi, got it late last Summer. In Summer I got a lot of heat comming from the heater vents which I could not control even though the heater was off,  I think it was comming from the radiator. Now that Winter is here  I am getting a lot of cold air from under the dash board,  especially behind the heater controls  although it is  drafty all across the bottom of the dash area . Anyone have any suggestions as to where these problems are comming from and how do I fix them...?

regards.
clarence
1990 multi.
pinehurst, nc.