Need Help with AC
Need Help with AC After I did the head/cam install on my car I cant get the AC to blow cold air. It just blows cool air. I had it vaccumed down and put the recomended amount of R-134 in last week. This week I bled the system and changed the line filter/screen and filled it will R-134 again. It still just blowing cool air. The pressures are good, so that means the compressor is working. The only thing I have not changed is the dryer/accumulator.
Any body ever had this problem?
I put a new compressor on a 98 S-10 one time, but we changed the filter and the dryer before we cranked it back up. I am thinking that the dryer is the problem, but I am not sure. It cost $100 for the dryer, so I was trying to avoid bying it! The car was down for a month before I hooked the AC back up!
Any ideas?
Any body ever had this problem?
I put a new compressor on a 98 S-10 one time, but we changed the filter and the dryer before we cranked it back up. I am thinking that the dryer is the problem, but I am not sure. It cost $100 for the dryer, so I was trying to avoid bying it! The car was down for a month before I hooked the AC back up!
Any ideas?
I am not sure! My friend who was installing the freon was telling me that the pressure looked good. I want to say around 30lbs. Does that sound right?
I have never done this myself so I am not familiar with the proceedure!
He does this for a living so I figured he knew what he was talking about. He is the one that gassed up my truck before and it was fine, but like I said I had changed the dryer on that one. He said you are supposed to change the dryer any time you open the system for any length of time!
As far as the vacum hose the small one on the back of the intake manifold is hooked up like it is supposed to be. The vent works fine blowing in fresh air and the heat blows in hot air. The AC temp in the vents got down to 67 degrees but would not go any lower. He said it should go to around 55 degrees.
I have never done this myself so I am not familiar with the proceedure!
He does this for a living so I figured he knew what he was talking about. He is the one that gassed up my truck before and it was fine, but like I said I had changed the dryer on that one. He said you are supposed to change the dryer any time you open the system for any length of time!
As far as the vacum hose the small one on the back of the intake manifold is hooked up like it is supposed to be. The vent works fine blowing in fresh air and the heat blows in hot air. The AC temp in the vents got down to 67 degrees but would not go any lower. He said it should go to around 55 degrees.
Originally Posted by Deeavi
I am not sure! My friend who was installing the freon was telling me that the pressure looked good. I want to say around 30lbs. Does that sound right?
I have never done this myself so I am not familiar with the proceedure!
He does this for a living so I figured he knew what he was talking about. He is the one that gassed up my truck before and it was fine, but like I said I had changed the dryer on that one. He said you are supposed to change the dryer any time you open the system for any length of time!
As far as the vacum hose the small one on the back of the intake manifold is hooked up like it is supposed to be. The vent works fine blowing in fresh air and the heat blows in hot air. The AC temp in the vents got down to 67 degrees but would not go any lower. He said it should go to around 55 degrees.
I have never done this myself so I am not familiar with the proceedure!
He does this for a living so I figured he knew what he was talking about. He is the one that gassed up my truck before and it was fine, but like I said I had changed the dryer on that one. He said you are supposed to change the dryer any time you open the system for any length of time!
As far as the vacum hose the small one on the back of the intake manifold is hooked up like it is supposed to be. The vent works fine blowing in fresh air and the heat blows in hot air. The AC temp in the vents got down to 67 degrees but would not go any lower. He said it should go to around 55 degrees.
Originally Posted by ta12sec
Should be a lot colder then 55. 30lbs? wtf is that, the system should only have like 2lbs in it (i dont know the exact amount I have never recharged an fbody) We want the high and low pressures. Is your compressor coming on start the car turn on the ac and watch the compressor is the clutch spining? Are the sensors pluged in is the compresor pluged in.?
Yes the dealer said 2 lbs of R-134! I was talking about the reading on the gage! Like I said I did not know what I was looking at! it might have read 3 lbs!?! We put 2 and 1/2 12oz cans in. That is right at two pounds. We tried adding the rest of the third can, for 36 oz total, but it did not help, so we bled it back out. I was in the car most of the time keeping the engine around 1500 rpms. Regardless the air temp never got below 67 degrees.
I am going to buy the dryer and hope that it helps.
Originally Posted by Deeavi
Yes the dealer said 2 lbs of R-134! I was talking about the reading on the gage! Like I said I did not know what I was looking at! it might have read 3 lbs!?! We put 2 and 1/2 12oz cans in. That is right at two pounds. We tried adding the rest of the third can, for 36 oz total, but it did not help, so we bled it back out. I was in the car most of the time keeping the engine around 1500 rpms. Regardless the air temp never got below 67 degrees.
I am going to buy the dryer and hope that it helps.
I am going to buy the dryer and hope that it helps.
Is the compressor cycling?
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Originally Posted by ta12sec
Is the compressor cycling?
Do you mean cutting on on and off? No! It was engaged the whole time, because we had the temp control set on max and high fan!
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Originally Posted by Deeavi
Do you mean cutting on on and off? No! It was engaged the whole time, because we had the temp control set on max and high fan!
30 pounds on the low side is about right,but what is your high side reading?make sure your condenser and radiator is not plugged up with dirt or whatever.you lose heat transfer that way.if you have an abnormally high reading on the high side,that would be a good indication.and make sure the cooling fans are working properly.
Originally Posted by 66deuce
30 pounds on the low side is about right,but what is your high side reading?make sure your condenser and radiator is not plugged up with dirt or whatever.you lose heat transfer that way.if you have an abnormally high reading on the high side,that would be a good indication.and make sure the cooling fans are working properly.
Thanks,
Everyhting looks good. My friend said the pressure reading are good! It was working great before I took it apart for h/c install. We covered all the holes to make sure no trash could get in. The only thing I have not done is install the new dryer/accumulater. But I just picke one up! Going to install it this afternoon. I will post back on this thread what happens!
Originally Posted by 2xLS1
It is overcharged. Fbodies need 24oz. (2) 12 oz cans. If you don't have one, find a stock air lid. There will be a label on it that will state the 24 oz capacity.
I went to a local dealer. They looked in the shop manual and they told me two lbs. That is approx. 2 and 1/2 12oz cans.
I am changing the dryer out tomorrow. We are going to put two cans in and check it. Then we will go from there!
Also there is nothing wrong with the blend door. Everything works like it should as far as direction of air flow and temp control.
So was this thing open to the atmosphere for the duration of your H&C install?
I'd say replace the drier too.
As said here B-4 make sure the blend door is closing fully.
Have you tried to feel the temp on the lines while it's running?
Is the accumulator & low side out of evaporator core condensating water on them, or frosting up?
I'd say replace the drier too.
As said here B-4 make sure the blend door is closing fully.
Have you tried to feel the temp on the lines while it's running?
Is the accumulator & low side out of evaporator core condensating water on them, or frosting up?