A/C damper problem?
Thread Starter
Safety Car
Joined: Jul 2010
Posts: 3,929
Likes: 386
From: Chandler AZ
A/C damper problem?
I'm out of ideas, I had a small refrigerant leak and added some stop leak, then topped off charge, not very cold.
Tonight I took out refrigerant and evacuated with a vacuum pump and weighed in 1.5 lbs R134a, as the sticker on the car says, 1 pound and 8 ozs.
Test drive, A/C isn't very cold, so I got car up on ramps, looked at condenser and radiator, took top panel off with air filter bridge and washed condenser and radiator the best I could.
Also verfied both radiator fans are running, took for another test drive after 1 am, 80 F out now, and best it put out was about 62 F.
I ran codes and zero in HVAC current or history, could those damper doors or whatever they are called be mixing heat with A/C?
For kicks I turned driver and passenger ***** to hot and back to cold to see if that did anything, nothing.
If I can't get it going cold like it once did when I first got car in 2003, it had pretty kick *** A/C, I'll have to park it for summer and drive my hoopty grand am.
Phoenix is too hot for subpar A/C, any ideas?
Tonight I took out refrigerant and evacuated with a vacuum pump and weighed in 1.5 lbs R134a, as the sticker on the car says, 1 pound and 8 ozs.
Test drive, A/C isn't very cold, so I got car up on ramps, looked at condenser and radiator, took top panel off with air filter bridge and washed condenser and radiator the best I could.
Also verfied both radiator fans are running, took for another test drive after 1 am, 80 F out now, and best it put out was about 62 F.
I ran codes and zero in HVAC current or history, could those damper doors or whatever they are called be mixing heat with A/C?
For kicks I turned driver and passenger ***** to hot and back to cold to see if that did anything, nothing.
If I can't get it going cold like it once did when I first got car in 2003, it had pretty kick *** A/C, I'll have to park it for summer and drive my hoopty grand am.
Phoenix is too hot for subpar A/C, any ideas?
Thread Starter
Safety Car
Joined: Jul 2010
Posts: 3,929
Likes: 386
From: Chandler AZ
Ok, today was first time getting a chance to check, car in garage with ambient temp 103-105 F during my testing, engine fully warmed up (198F)and both fans on low speed my suction pressure is 85 and 220 on high side.
With a pretty decent fan on high in front of car 85 low side 195 high side.
The pressures are the same at idle, 1500 and 2000 rpm.
I was reading it could be a bad compressor or bad compressor control valve.
Also thinking it's not a fan issue as it doesn't cool good going down the road.
With a pretty decent fan on high in front of car 85 low side 195 high side.
The pressures are the same at idle, 1500 and 2000 rpm.
I was reading it could be a bad compressor or bad compressor control valve.
Also thinking it's not a fan issue as it doesn't cool good going down the road.
Last edited by 1999corvettels1; Jun 22, 2018 at 11:19 PM.
Burning Brakes
Joined: Jan 2006
Posts: 788
Likes: 105
From: Olathe Kansas
Those pressures are OFF... and should change with RPM increase, esp the high side..
At your high temps I would expect to see about 35-45 on low side.. And 225 ish on the high side..
It sounds like you have a weak compressor to me.
At your high temps I would expect to see about 35-45 on low side.. And 225 ish on the high side..
It sounds like you have a weak compressor to me.
Thread Starter
Safety Car
Joined: Jul 2010
Posts: 3,929
Likes: 386
From: Chandler AZ
Anyway to tell what color orifice tube without opening up the system?
Looking at rockauto at 4 seasons new compressor kit that includes drier, orifice tube, there are 2 package options.
Looking at rockauto at 4 seasons new compressor kit that includes drier, orifice tube, there are 2 package options.
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Thread Starter
Safety Car
Joined: Jul 2010
Posts: 3,929
Likes: 386
From: Chandler AZ
This is flush solvent in a empty water bottle, see some crud that sunk to the bottom. It's near impossible to capture the solvent, most went all over the place and puddled under car.
Melting Slicks
Joined: Jan 2009
Posts: 3,275
Likes: 739
From: Miami FL
Now that you're working on it, what color did it have installed? Does it match the information above?
97-99:
00-04:
.
Last edited by GCG; Nov 10, 2018 at 02:17 PM.
Thread Starter
Safety Car
Joined: Jul 2010
Posts: 3,929
Likes: 386
From: Chandler AZ
The white one has the tangs on the end with the screen, the yellow has the tangs on the opposite end.
https://www.corvetteforum.com/forums...fice-tube.html
Last edited by 1999corvettels1; Apr 30, 2019 at 02:02 PM.
I had to read the thread again, but I appreciate it. I hope everything went well and that it's up and running. Thanks! 
Thread Starter
Safety Car
Joined: Jul 2010
Posts: 3,929
Likes: 386
From: Chandler AZ
Was looking up pictures in my old threads with the crud that clogged up my A/C, to show somebody asking about A/C Pro.
Searching for the pictures, I saw that I missed your question somehow, so I answered. Lol
It's cooling pretty good now.
Searching for the pictures, I saw that I missed your question somehow, so I answered. Lol
It's cooling pretty good now.