Check for a vacuum leak under the hood that feeds the AC/heater switch.
95 Suburban 1500. Had the compressor replaced about 3 years ago.
> Recently it's been idling rough when the A/C was on - made a mental note to
> have it checked out soon - but now it's obvious that it wasn't soon enough.
>
> Last night, while driving home from another town, I noticed the AC wasn't on
> anymore. Didn't mention it to my wife, I thought she turned it off since it
> was around midnight. Today I noticed that the A/C button was on, but it
> wasn't running (Engine was idling smoothing ). Figured that the
> compressor blew or something. But then I noticed that the vents wouldn't
> switch if I turned the knob - I only had air coming from my feed - no
> dashboard air - no matter what position I turned the knob to.
>
> How could these two issues be related? I checked all the fuses. >
>