I keep an instant read pocket thermometer with a 1" diameter dial inserted into the center vent of every car that I have. The thermometers are about $3 at Harbor Freight Tools.

With the blower fan on high and the air coming from outside (not on recirculate) you should get about a 35° temperature drop. In other words, if the outside air temperature is 85° you should get 50° or lower out of the center vent. A really great air conditioner system can achieve a 50° temperature drop.

With an outside air temperature of 80° and the fan set on LOW SPEED on my 97 Catera I can get an outlet temperature of 27°. All of the above temperatures are assuming a relative humidity of 30% to 40%. If your humidity is higher, you won't get as much cooling.

Terry

--- In CateraOwners@ yahoogroups. com, jbeardjr@... wrote:
>
> John W.
>
> I plan to se my temp gun to check the maximum cool temp coming out of my a/c; I feel that the coolder the air, the quicker the cool,no matter the heat.But if it isn't 'cold', then the temp drop is less,and takes longer to cool.
>
> Granted, I have no tint, but my '95 240 SX gets cold even w/o tint on the same days!
> In all, I feel the system should perform better, hence need ideas on possible problems,solutions.
>
> Thanks!
>
> John B.
>
>
>
> ____________ _________ _________ __
> From: John Williams <john05636@. ..>
> To: CateraOwners@ yahoogroups. com
> Sent: Tuesday, July 7, 2009 11:57:06 AM
> Subject: Re: [CateraOwners] "Analysis,Mr. Spock"... .A/C NOT COOLING! (SOMEWHAT)
>
>
>
>
>
> i just did the a/c�recharge and mine don't seem cold but is cool on hot days�over 90 and i use the reciclate mode so no hot air can come in next is window tint� 15% should drop it even more! i�ran my a/c this morning and froze me out! but it�was 84 not 94?
> �
> John Williams.
>
>
>
>
> ____________ _________ _________ __
> From: "Pernesky, Dave" <dave.pernesky@ safholland. com>
> To: CateraOwners@ yahoogroups. com
> Sent: Tuesday, July 7, 2009 7:08:37 AM
> Subject: RE: [CateraOwners] "Analysis,Mr. Spock"... .A/C NOT COOLING! (SOMEWHAT)
>
>
> Have you made sure that the air duct vent (outside)is closed so the cabin air is recalculating?
> �
> David
> �
> From:CateraOwners@ yahoogroups. com [mailto:CateraOwner s@yahoogroups. com] On Behalf Of John
> Sent: Tuesday, July 07, 2009 2:33 AM
> To: CateraOwners@ yahoogroups. com
> Subject: [CateraOwners] "Analysis,Mr. Spock"....A/ C NOT COOLING! (SOMEWHAT)
> �
>
>
>
>
> Guys, need your collective thoughts....
>
> Got my a/c system recharged after compressor replacement, but since then,it doesn't seem to cool as 'cold' as before.The amount of refrigerant, I/O pressures ,ect all are correct;changed the dryer/ accumulator, oriface tube....but still, with this hot,humid SE TX heat, I'm barly staying cool..
> After a long drive, 20 miles or so, it starts to seem like its breaking the temp down,but just enough to keep the windows up,know what I mean?
>
> Thanks in advance for your input.
>
> John
>