Cipher5170

i scanned the HVAC controls for codes but found none. the AC just doesn't turn on. the fan blows high but just ambient temperature air blows out. the heat works fine but no AC. what gives?

TIA

mpwolf

Is the compressor turning off/on when you hit the Econ button?

Cipher5170

doesn't sound like it. let me go listen more closely.

tedavis01

Are you out of coolant and is the compressor coming on?

RKA

What does the exterior temp in your trip computer say?

Cipher5170

no codes on a bad sensor

Cipher5170

...and the air def isn't getting any colder.

RKA

I believe one of the A4 guys had an issue with is AC, and it was shortly after timing belt work was completed. I believe it eventually traced back to a connector that wasn't reattached (for the AC compressor clutch or something like that). I doubt something like that would throw a code, so you might have to inspect the wiring to look for an issue.

Cipher5170

coolant? the AC stuff or the pink stuff? the compressor is coming on.

Cipher5170

built in 10/99 so you think the AC needs a recharge or something?