SPONSORED LINKS

Bad Compressor?

Tiny
JIM NIELSEN
  • MEMBER
  • 2001 PONTIAC GRAND PRIX
  • 3.1L
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 125,000 MILES
Compressor won't come on during normal operation. Freon is perfect, fuses and all relays okay. Compressor operates and cools fine when tech turns it on with his diagnostic computer.
Friday, August 1st, 2014 AT 12:40 AM

17 Replies

Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
It sounds like you have an AC compressor going out here is a guide to help walk you through the repairs.

https://www.2carpros.com/articles/replace-air-conditioner-compressor

Please run down this guide and report back.

SPONSORED LINKS
Was this
answer
helpful?
Yes
No
-1
Friday, August 1st, 2014 AT 5:39 AM
Tiny
ALLENJAMESOXENDINE
  • MEMBER
  • 1 POST
  • 2000 PONTIAC GRAND PRIX
  • 220,000 MILES
I have a 2000 Pontiac Grand Prix GTP Supercharged and my AC isnt getting cool. My compressor use to make a loud noise when the air was turned on but after I put freon in it, it stopped but it still makes a little sound but it still isnt getting cool. What to do?
Was this
answer
helpful?
Yes
No
-1
Tuesday, May 12th, 2020 AT 11:18 AM (Merged)
Tiny
PROMECHANIC
  • MECHANIC
  • 536 POSTS
This guide will help

https://www.2carpros.com/articles/replace-air-conditioner-compressor
Was this
answer
helpful?
Yes
No
+1
Tuesday, May 12th, 2020 AT 11:18 AM (Merged)
Tiny
GMG46
  • MEMBER
  • 1 POST
  • 1999 PONTIAC GRAND PRIX
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 135,000 MILES
My 1999 Grand Prix GT Sedan is making a intermiten grinding noise when started. The noise seems to be pully on the air compressor. I have lubed and it seems to help but the noise comes back after a few miles. The noise is getting worse and louder?
Was this
answer
helpful?
Yes
No
Tuesday, May 12th, 2020 AT 11:19 AM (Merged)
Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
You can't lube a pulley. All you can do that way is cause more problems. Use a spray bottle of water to determine if it's the belt or the pulley. If it's the pulley, then the only solution is to replace it and you're looking at a whole compressor there.
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
Tuesday, May 12th, 2020 AT 11:19 AM (Merged)
Tiny
MADJOE1785
  • MEMBER
  • 1 POST
  • 1999 PONTIAC GRAND PRIX
Noises problem
1999 Pontiac Grand Prix 6 cyl Automatic

My car is making some kind of grinding/screeching noise and it seems that the pulley that is closest to the AC compressor is making this noise. How do I make this noise go away?
Was this
answer
helpful?
Yes
No
+1
Tuesday, May 12th, 2020 AT 11:19 AM (Merged)
Tiny
OBXAUTOMEDIC
  • MECHANIC
  • 3,711 POSTS
Hello,

If it is the Idler or the Tensioner Pulley you will need to replace it. Check out link below and find the Belt Diagram that matches your vehicle to locate the pulleys....

https://www.2carpros.com/car_repair_information/year/1999/make/pontiac/model/grand_prix/1999_pontiac_grand_prix_drive_belt_routing_diagram.htm

.
Was this
answer
helpful?
Yes
No
Tuesday, May 12th, 2020 AT 11:19 AM (Merged)
Tiny
JR47
  • MEMBER
  • 100 POSTS
  • 1999 PONTIAC GRAND PRIX
  • 3.8L
  • V6
  • FWD
  • AUTOMATIC
  • 207,480 MILES
Just wanted to know how much oil is supposed to be in a a/c compressor. I have read on a bunch of different forums that say to pour out the old oil and measure it but my old compressor got knocked over and most of the oil that was in it poured out onto my garage floor. Also what type of oil is it just want to be sure and get the right stuff.
Was this
answer
helpful?
Yes
No
Tuesday, May 12th, 2020 AT 11:19 AM (Merged)
Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
What else was changed beside the compressor?
Was any flushing done?
Was this
answer
helpful?
Yes
No
+1
Tuesday, May 12th, 2020 AT 11:19 AM (Merged)
Tiny
JR47
  • MEMBER
  • 100 POSTS
No flushing was done yet but The condenser and the accumulator will also be changed on it.
Was this
answer
helpful?
Yes
No
Tuesday, May 12th, 2020 AT 11:19 AM (Merged)
Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
In that situation I would put 4 ounces in the compressor and 2 more during charging through the low side port using vacuum,

I use PAG46 in those.

Be sure to rotate the compressor about 10 times before starting so it doesn't lock on the oil.
Was this
answer
helpful?
Yes
No
Tuesday, May 12th, 2020 AT 11:19 AM (Merged)
Tiny
JR47
  • MEMBER
  • 100 POSTS
Ok last question I heard that when installing the new condenser you should put a small amount of the PAG oil in it. Is this a required thing to do?
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
Tuesday, May 12th, 2020 AT 11:19 AM (Merged)
Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
No, some will end up there anyway.
Was this
answer
helpful?
Yes
No
Tuesday, May 12th, 2020 AT 11:19 AM (Merged)
Tiny
U156531
  • MEMBER
  • 8 POSTS
  • PONTIAC GRAND PRIX
I have a 1996 pontiac grand prix. The air condiotining isn't working. When it's truned on I can see that the compressor isn't engaged. I've tried to add freon with a can of r134 but it's not taking any of the freon in. I'm using one of those snap on hoses you get at an auto parts store. The gage shows that there is no pressure in the system. Why won't it take any of the freon into the system?
Was this
answer
helpful?
Yes
No
Tuesday, May 12th, 2020 AT 11:19 AM (Merged)
Tiny
SC1 RACING
  • MECHANIC
  • 117 POSTS
If there is no pressure in system. That means you have a leak and will only waste the freon. The reason it will not take from the can is because there is no vacum to suck out of the can. Or you may have simply not screwed fitting down to puncture can.
Was this
answer
helpful?
Yes
No
Tuesday, May 12th, 2020 AT 11:19 AM (Merged)
Tiny
HDFVR
  • MEMBER
  • 2 POSTS
Is the car on and a/c running when adding the freon? Are you adding the freon to the "lo-side"?
Was this
answer
helpful?
Yes
No
+1
Tuesday, May 12th, 2020 AT 11:19 AM (Merged)
Tiny
DAVE257
  • MEMBER
  • 2 POSTS
Just because the gauge doesn't show pressure, doesn't mean there isn't any. It is possible for the low pressure refill valve to stick or plug. If you are familiar with a/c system, install a separate gauge on the low side of a/c system. If you get no reading, STOP. The next safest thing is to take you vehicle to a qualified shop to verify your reading. If you are not that familiar with a/c systems, take your vehicle there first.
Was this
answer
helpful?
Yes
No
+1
Tuesday, May 12th, 2020 AT 11:19 AM (Merged)

Please login or register to post a reply.

Related Air Conditioner Compressor Relay Content

VIEW MORE

Sponsored links