2002 Cadillac Deville A/C question

[TerraDown]

I have a 2002 Caddy Deville. Car works great, all except 'part' of the A/C. The two vents that are on passenger side blow cold air. Driver's side by door blows cold air. But the middle/driver blows only cool air.
Does anyone have any idea what could be causing this?
Thanks.

[motordavid]

Hit a good GM oriented Indie, or a good A/C shop. They will find a code, if the system has throw one...
From fading memory, there are a few potential fault codes via the cooling sys/AC senors that when 'defective', send cool air to one side(s), but not all the vent outlets.

Wish my memory was better on details, and don't recall the fix, but any good A/C shop that is familiar with GM A/Cs, (very good HVAC units, imo), will be able to ascertain the glitch.
GL, mD

[WMak70]

There are blend doors that are supposed to be syncronized so that you get heat when you want it and ac when you want it, they keep the two functions separated. The vacuum actuators go bad sometimes and need to be replaced so they pull the correct door shut when needed or open when needed.

However, I had a similar problem on my 99 Caddy (could be similar to your 2002) and I found it was the goofiest thing. On the passenger side firewall, right behind the shock tower, there is a skinny little vacuum line about 3/16 of an inch in diameter. It is rubber and goes to a vacuum tree that ends up on the block. It passes through the firewall right next to the ac lines. Those hoses go bad and I found mine was soft and cracked, so no vacuum was getting through. $2 later with some vacuum hose from Autozone, and my ac blows ice cold and both sides are blowing the same.

You might want to look at yours because I hear this is a common problem.

[TerraDown]

Thought I'd give an update guys.
A bit of information I did not give...as a few more days progressed, I also lost cool air-every vent.
So today I took it to Modern Air on Summerlin and 41 here in Ft. Myers. They ran diagnostics and said it was a compression hose. 375.00 dollars later, I have cold air again. Thank my lucky stars, it was not the compressor.

I look at it like a car payment, it's an older car. yes. But paid for in full, and very tight, the undercarriage is like a brand new car. So almost 400.00 bucks is cheap.

Thanks again, I know you would have sprang with more info had I given it to you.