Hello. I have a 2010 S80 with approx 200k miles that Is blowing only warm heat when idling. The car will give the warm heat not hot when it idles but as soon as you start to drive the heat just blows cold. It is on the recirculating setting as I thought the vent door was the issue with not improvement. I am not sure where to look next and was hoping to have some direction before I started to pull the dash apart. I was think a blend motor or similar pry could be the issue.
thanks for any advise and help.