No heat in Audi A6 1995 had heater core and valve

SOURCE: 96 audi a4 heater blows cold air

you have air in the system!! you have to unbolt the filler tank and lift it 5 inch higer first. then loose the right hose on the heater core( this hose have and hole to bleed the system) and then put antifreeze until the antifreeze will go out of the hole then re install the hose to the heater core, then ajust the level correcty
have fun
jean-martin

SOURCE: where is the control valve that controls the flow

on modern VW (group)product,they do not have a valve any more.they use a flap inside the heater box to control the flow of air instead.

Testimonial: "It is great to be able to talk to someone who might know how to fix my problem.... Thank you goeffreyh"

SOURCE: Where is the Audi A4 1.8T (2001) "Heater core"

It's inside the dash and requires the removal of the entire dash and framework, center stack and tunnel, kickpanels, etc. Not fun or easy at all.