HVAC Fault Codes

[pete-p]

Thanks for your answers. It sounds easy enough, just need the time and dry weather to tackle them all. Are they all usually the same motors or are they different ones depending on location?

Presumably the worst that will happen if I leave it for a while will be that I keep hearing the clicking noise and air won't always go where is meant to?!

If new ones aren't cheap from TPS then I'm sure the dealer will want more!

[Adrian E]

One's inside the car have an 'a' on the end of the pet number. The one in the engine bay is different and doesn't have the a suffix

Can look out part number and price when I'm home tonight? From memory £120

[johnny_quattro]

See this post that Adrian and I commented on:

http://forum.a8parts.co.uk/showthread.php?t=4786

Please find two attached screenshots from ELSAWIN.
PM me if you want access to my ELSAWIN running under Virtualbox, and I'll let you remote in, if that helps?

[johnny_quattro]

I think (if I remember correctly) that there are 4 motors on each side of the console, plus the other one that Adrian mentioned under the bonnet which seems to be a different part. Don't take this as gospel, but judging from all my rummaging around, the 4 motors seem to be similar. I ordered one from the forum sponsors in order to replace my faulty clicky-clicky unit.

Just like IT said, you can normally feel the clicking if you place your hand on each motor in turn if you're unable to echo locate it like a dolphin lol - that's exactly what I had to do in my case.

[ainarssems]

I have not had any issues with them on 8 so far but I had 3 of them fail on A6 1 shortly after another, first it was intermittent but gradually got worse. I don't think they are the same on 6 and 8 but very similar. I took them off to investigate and found that because they are sealed units they had a lot of carbon dust build up in side from the wear of carbon brushes. The brushes and slip rings were still in good condition, it's just that all the wear dust was either shorting out or preventing good connection. I cleaned them up, greased bearings and gears with fresh grease and re-assembled, worked as new since without any problems. So if they are £120 each new it might be worth checking to see if the old ones are serviceable. Or if you buy second hand it could be a good idea to give them overhaul before putting in the car.

[Adrian E]

That sounds a very sensible approach

If someone wants my used one after removal to see if they can resurrect it I'm happy to post it at cost

The drive gear is on back order from Germany so it'll be a couple of weeks before I swap mine over

[Adrian E]

Well I swapped my motor today for the new replacement. Not many screws to get out but my god access is limited! A screwdriver with a 90 degree bend would've been handy! Even a 1/4" drive ratchet wouldn't really fit....luckily the screws aren't tight.

Did basic settings and all is good - watched the flaps move through their range

I didn't change the plastic end on the motor in the end as it's attached pretty firmly to the flaps themselves and I didn't want to break anything

Found another missing screw from where someone's been in there before, so will need to source a new one

Took the lid off the old motor and no signs of issues - could just be the motor has got weak with age