A/C not increasing or decreasing in temperature of air...i go and get freon in it...temperature still remains the same even though the guy at the shop just tells me to drive it around for a bit...can someone help me out...(98 Grand Marquis)

dont flame too badly, i know didly squat about cars for the most part...

7/18/2006 5:27:53 PM

Nope. It oughta cool a fair amount straight outta the shop.

It's a system designed for R134, and therefore its idling efficiency should be adequate enough to provide a reasonable amount of cold air at a standstill.

It's true that a large quantity of moving air, such as that you get while the car is in motion, makes a big difference in the system's efficiency. But you still should notice an improvement right off the bat.

Who the hell did this? Has the car had any AC work done to it prior?

7/18/2006 5:34:45 PM

no...i went to that one shop off of Hillsborough going towards downtown (sorry that sucks but dont know the name of it)...

further more, they said that the air was blowing at 34 degrees...ummm, no...i hope i didnt give them 70 bones for nothing at all...

[Edited on July 18, 2006 at 5:40 PM. Reason : ...]

7/18/2006 5:38:09 PM

maybe -34 from ambient temp or ~60 - that would be about right... but it should feel cool immediately

7/18/2006 5:55:34 PM

so does freon NOT have anything to do with heat in the car...the temp. isnt rising at all...

7/18/2006 5:58:33 PM

Now IF you have another problem, you're gonna run into a situation where the system may intermittently NOT cool at all. But only with a system utilizing a thermal expansion valve...if the expansion valve sticks closed.

It may only be an intermittent problem. However, a Grand Marquis should have a CCOT system (Clutch Cycling Orifice Tube) which has no expansion valve to stick closed.

34 degrees at the evaporator is pretty damn good performance. And you should definitely be able to notice a difference.

7/18/2006 6:02:15 PM

so what would cause my car to not increas in temp. at all...it seems that it just stays one temp. regardless of if i have it at 60 degrees or 90...

7/18/2006 6:08:26 PM

wait so the heat isn't working well either?

Maybe there is an electrical problem with the controls in the car

7/18/2006 6:14:02 PM

the heat isnt working at all...thats what im trying to say...the temp stays the same regardless of if i have it at 60 or 90...

7/18/2006 6:15:14 PM

^^I think Ray hit it.

You must have HVAC control issues.

7/18/2006 6:23:13 PM

ok, i dont know anything about cars, but i know that might cost 1 million dollars to get looked at...lol

7/18/2006 6:27:01 PM

Quote :

"Orifice Tube"

Ha ha.

7/18/2006 6:37:38 PM

Just keep your tube outta my orifice.

7/18/2006 6:38:42 PM