Checked duo valves. took them apart and both moved freely. ran car from cold start as you suggested. No heat coming into single inlet or double outlet pipes although both valve bodies ran hot. turned on a/c and blew coldish but not chilled. then ran heater to full heat. pipes got warm. ran aback to cold and turned on a/c. ran warm - not as cold as first run. using temperature gun onto condenser only showing 77F.

On to blend doors?