another a/c question
#1
Member
Posts like a V-Tak
Thread Starter
Join Date: Dec 2005
Location: raleigh nc
Posts: 41
Likes: 0
Received 0 Likes
on
0 Posts
another a/c question
i know there have been several a/c questions over the last month with the weather getting warmer. I have replaced my entire system new compressor, new evap, new orifice tube. put the recommend amount of oil in the compressor before the install, all this done to convert to 134, i went to put the 134 in the system and i can't get the compressor to kick in and draw the 134 through the system. the only code i get is that stupid actuator door one but that wouldn't keep the a/c compressor from coming on just the cold from getting into the car, I should be putting almost 2.5 cans in the system, but after about 1/4 of a can the pressure is at the level it should be. but i can't get the compressor to come on so any suggestions of something i am overlooking would be appreciated.
#2
Senior Member
True Car Nut
You could try pumping the system down with a vacuum pump for 30-45 minutes. That will get rid of most of the moisture in the system. Then, with the system still holding vacuum, charge the first can of R-134a. You can do this without the engine running and with the can upside down to charge it quickly as a liquid. After the first can is charged, the system pressure should be high enough that the compressor will come on when you start it up, allowing you to charge the rest. Charge the rest with the can upright - it is slower, but safer that way. I am not sure, but, if your system is like most, there is a low pressure switch that will not allow the compressor to come on when there is insufficient refrigerant (pressure) in the system.
#3
Member
Posts like a V-Tak
Thread Starter
Join Date: Dec 2005
Location: raleigh nc
Posts: 41
Likes: 0
Received 0 Likes
on
0 Posts
ac
Originally Posted by bill buttermore
You could try pumping the system down with a vacuum pump for 30-45 minutes. That will get rid of most of the moisture in the system. Then, with the system still holding vacuum, charge the first can of R-134a. You can do this without the engine running and with the can upside down to charge it quickly as a liquid. After the first can is charged, the system pressure should be high enough that the compressor will come on when you start it up, allowing you to charge the rest. Charge the rest with the can upright - it is slower, but safer that way. I am not sure, but, if your system is like most, there is a low pressure switch that will not allow the compressor to come on when there is insufficient refrigerant (pressure) in the system.
#4
Senior Member
Posts like a Northstar
Join Date: Jul 2006
Location: Waukesha, Wisconsin
Posts: 547
Likes: 0
Received 0 Likes
on
0 Posts
I am confused as to how a shop put in the correct amount without the compressor running? I always thought you had to have the system running in order to pull the freon in and charge it up? I would look at the high pressure switch. If there is enough pressure in the system and the compressor does not kick in then it is most likely the high pressure switch. I am not sure where it is located on our cars though as I have not dealt too much with the AC yet.
#5
Member
Posts like a V-Tak
Thread Starter
Join Date: Dec 2005
Location: raleigh nc
Posts: 41
Likes: 0
Received 0 Likes
on
0 Posts
ac
i think i mentioned that i had jumped the relay, i got that information for them. The guys at the ac shop jumped the relay to get the stuff in the system. I just did it so i could see it run for myself. They were willing to look for the problem for me, for a fee of about $120 an hour. so i thought i would bring it home and look through the simple stuff first and get some feedback from you guys. And not to mention read countless post about ac problems.
Thread
Thread Starter
Forum
Replies
Last Post
OLBlueEyesBonne
General GM Chat
4
08-20-2005 02:12 AM