Eco not working on AC

Marky79

Registered User
Just picked my rs3 up at the weekend and only just discovered that the eco mode on the aircon isn’t working. Strange one, anyone got any ideas? It’s a bit far to be heading 4hrs back down the county.
 

Liam Morris

Registered User
My A3 only goes into Eco when i select Efficiency in the drive select, seeing as the rs3 doesnt have an efficiency mode is it meant to have an Eco AC Mode? Hopefully someone here with an RS3 can confirm if this is the case or if im being stupid lol :icon thumright:
 

Marky79

Registered User
My A3 only goes into Eco when i select Efficiency in the drive select, seeing as the rs3 doesnt have an efficiency mode is it meant to have an Eco AC Mode? Hopefully someone here with an RS3 can confirm if this is the case or if im being stupid lol :icon thumright:
Thanks for the reply. Makes sense, but my S3 had it in all modes, and the manual shows it it.
 

Liam Morris

Registered User
If the Auto button isnt doing anything then something may be a miss, I would recommend posting in the dedicated rs3 8v thread too as they will likely have more of an insight as the RS works different with no eco.
 

Boj27

Active Member
Hard to say without a VCDS scan. Could be a fault. Noticed recently there is an update for the AC unit from v130 to v161. Doubt Audi will do it unless this is confirmed to fix any faults you’re having with the car, but an indie dealer should be able to do it for you if they have ODIS.
 

Marky79

Registered User
Hard to say without a VCDS scan. Could be a fault. Noticed recently there is an update for the AC unit from v130 to v161. Doubt Audi will do it unless this is confirmed to fix any faults you’re having with the car, but an indie dealer should be able to do it for you if they have ODIS.


My v2 cable arrived yesterday, so I had an afternoon of poking around. Turns out the eco profile wasn’t enabled in the HVAC. Made the coding, locked the car for a min, got back in and it’s all working. Strange why it wasn’t enabled, somebody poking around that didn’t know what they were doing maybe? Who knows.
 

Boj27

Active Member
My v2 cable arrived yesterday, so I had an afternoon of poking around. Turns out the eco profile wasn’t enabled in the HVAC. Made the coding, locked the car for a min, got back in and it’s all working. Strange why it wasn’t enabled, somebody poking around that didn’t know what they were doing maybe? Who knows.


Which byte was the setting in? Will check with mine. Please send me your auto scan :)
 

Marky79

Registered User
I have a 2018 8v and have never seen this eco mode. Did it get removed on later models?
Not sure, nobody seemed interested in getting involved. Anyway, mine was missing, had it on my 8v S3. I’ve coded it now as above, fans are quieter now.
 
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