Gavin70248

It's a fairly easy job if you have the correct spline tool, you can do it without taking suspension off as Audi reduced the size of the knuckle to allow access to the bearing bolts. Can be done in under 2 hours. Gavin.

Afraid not.

Just like to add, no matter what the heating controls were at, the drivers side was cold due the blocked matrix. New matrix fixed problem.

Morning Gareth, According to the garage the matrix had a blockage which was causing the problem. New matrix solved it. Gavin.

Sorry for the late reply, been busy. The heater matrix was blocked and had to be replaced, all good now. The dealer I bought the car from repaired it for me, free of charge, which probably cost him a fortune as he had to buy matrix from Audi. He did say its something he's going to check on any audi trade-in from now on. So if anyone is buying private please check this. Cheers Gavin.

That's what I'm thinking, diagnostic is saying everything is OK so my next step is to flush the system.

There is plenty of air coming through the drivers footwell, just what's coming out is cold ??

Thanks, I'll have a look tonight.

Advice needed, My A6 has a heating problem, drivers side cold and passenger side hot, I'm thinking the matrix is clogged. Any suggestions on the procedure to unclog without removing matrix ....... I've done a diagnostic and everything thing is coming up as a pass. Any suggestions are really appreciated Gavin.