ThatLadOnTheSpanners

Thanks Gareth. I’ve gone for a lower sidewall size so in theory they should be the same rolling radius. Many thanks Nath

Hey guys! I’m changing the wheels on my A4 from 17 inch to 18 inch wheels. Do I need to change anything via vagcom? many thanks Nath

Hi Gareth. I only suggested this as I know 100% that on LR’s this is the exact case and the exact symptoms and these also show no other faults with the heating system. I understand that this being a different make of vehicle that it may be completely different but I’ve had to start with one theory and as Steve has now suggested I will have to go along other routes via VCDS. Thanks Nathan

Hey Gareth! Thanks for replying! One of the reasons for suspecting a partially blocked matrix is by trade I work on modern Land Rovers (Discovery 3 and newer) and they suffer from the exact same symptoms and thats down to a matrix issue. I may be leading myself down a completely incorrect path though. I presume I should be able to see any Blend Motor issues via VagCom by looking at dynamic read outs? Many thanks Nathan

Hey guys! My 2015 A4’s heater is poor on the drivers side (roasting on the passengers side) so I suspect a partially blocked/blocking matrix. So, how much of a pig is it to change the matrix? Dash out or partial strip down? I’ve tried searching within the forum but can’t find anything. any help or tips much appreciated! Taaa 👍