Hello new to the forum and wondering if i could get some pointers on some a6 3.0 TDI faults.

I did a search and theres obviously various faults with the climate control systems but not come across what im gettin...

Basically the heaters hot/cold work fine, But when on windscreen it blows hot no matter what i put the temperature set to..?? put it on feet and its fine hot/cold ect.

also when its been warmed up then left for 30mins it really struggles to start?

thanks Ben