Hi all
Hope you can help, I'm new to Audi ownership and have a 96/7 a4 diesel estate that's not blowing warm air through the interior vents.

Air comes through the vents ok, there is a very small bit of warmth from them. I've topped up the anti freeze/coolant, I've also checked the air filter which, though it needs replacing, is ok.

Any other ideas what I might be looking at? The air con on it blows through perfectly...

Many thanks

Craig