This is my first post here.
My mechanic installed a used AC compressor in my 95 DeVille (4.9L V8) yesterday, a new compressor was too cost-prohibitive. Once it was installed and charged, the cold air was blowing out the defogger/defroster vents atop the dash and not the front vents.
A quick Google search on this problem showed that in 90% of the search results, the problem was a vacuum leak.
Could someone offer guidance as to where to begin looking for this? I am bringing the car back Friday morning for this, but last night, I discovered something that looked like a vacuum hose had come apart from somewhere way down in the rear of the engine but could not see exactly where.
Due to the location of the compressor, they had to lift the engine up in order to remove/replace and perhaps this hose became disconnected during that time, as the air (cool or warm) had blown out correctly prior to this.
Thanks for any advice. I appreciate it.