Hello
I have have a Chev Venture 2002 van. Heat to the windsheild only works for 10 min or so after starting the van. The only blows cold. If is switch to any other setting other than windsheild then I get heat. Some times when I switch back from floor to windsheild I get heat for a bout 10 min then the blower only blows cold. Other times the blower blows cold on the windsheild immediatly. Any hints.
Thanks Douglas