TNTramair

iTrader: (15)

after its been on for awile it feels as though less and less air comes out of the ducts....gets to the point where its turned up on 4 and its kickin air out equavelant to being on 1. i saw a title before on here about a/c slowing down but the search results netted no results. anyone have a fix for this or can tell me what someone did to correct this for you??

TNTramair

iTrader: (15)

anyone?

boondiggys

iTrader: (165)

how much air comes out on the first setting?? it sounds like your blower motor is shot

TNTramair

iTrader: (15)

after it slows down on the first setting theres barely any air coming from the vents.

2001NBMZ28

Is the blower motor slowing down, or just the airflow? If it's just airflow could be the evaporator freezing up.

RPM WS6

iTrader: (3)

That's probably the most likely problem.

Good news is, if that's the problem it's not a hard fix. The HVAC blower motor is located under the passenger side dash, behind the kick panel. It's just 3 screws to pull and the motor comes out. I think the part is something like $85 from GMPD.

Much easier than changing plugs or something...

TNTramair

iTrader: (15)

yeah...its just the air flow. get weaker and weaker the longer i drive to the point where ill have it on full blast and its kickin out air equavelant to being on the very first setting.

2001NBMZ28

I'd have the pressures read - sounds like you're low on referigerant. Once the evaporator freezes up it'll restrict air flow, plus it won't cool properly - just a fan blowing on an ice cube. Hear any "crackling" sounds when turning the AC off? I see signs all over town down here in Jax for "Free AC Check"

TNTramair

iTrader: (15)

i work at a shop so ill have it checked there. thanx for the heads up...ill give it a try. took it to a dealer before and they just blew me off cause they couldnt duplicate the condition. fair enough since it doesnt happen untill ive been driving for about 30 minutes, but i dont think they bothered to check the freon and pressures.

30th droptop

iTrader: (-1)

Is the flow slowing down or the motor? Notice the sound of the blower motor at first and then when it slows down. If it seems to be blowing the same speed, it could be the evaporator, as has been said, or it could also be a vacuum motor for a door in the HVAC module slowly creeping back and restricting flow.

TNTramair

iTrader: (15)

the blower motor speed does not change which would lean me toward the freezing evaporator theory. all signs point to that i just have to verify and find out why its happening in the first place. ill know this weekend.