Air condition

DENNISGWAGNER

MEMBER
1999 HONDA CRV
4 CYL
2WD
AUTOMATIC

I have a 1999 crv the a/c clutch went out but was still cooling. I replaced the clutch and the pressure on the low side was 90 so I replaced the compressor and I put in 1.5 lbs if r134a now the low side has a vacume. The low side lines are clear to the firewall. The high side lines through the condensor not as much air goes through. Could it be expansion valve or condensor needs flushed better?

5 Replies

WRENCHTECH

MECHANIC
20,757 POSTS

You're a little light on the refrigerant. The capacity is 26.5 ounces. It still shouldn't be pulling into a vacuum though. That would indicate a restriction, most likely the expansion valve. I don't see how it was cooling with a bad clutch though. It can't cool without an operating compressor.

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Tuesday, May 10th, 2011 AT 1:54 PM

WRENCHTECH

MECHANIC
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Also not that most of the single cans of refrigerant that you buy are not a full pound so read the label.

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Tuesday, May 10th, 2011 AT 1:56 PM

KHLOW2008

MECHANIC
41,815 POSTS

What are the low and high side pressure readings?

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Tuesday, May 10th, 2011 AT 2:52 PM

WRENCHTECH

MECHANIC
20,757 POSTS

It doesn't much matter what the high side reads as long as the low side is pulling into a vacuum. There is no refrigerant traveling to be able to build high side pressure so the reading won't tell you much at all. I live and work in south Florida and have worked at shops that do exclusively A/C repair so I'm quite familiar with A/C repairs.

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Tuesday, May 10th, 2011 AT 3:26 PM

WRENCHTECH

MECHANIC
20,757 POSTS

One more test that you want to try is locate the liquid line that runs from the condenser to the evaporator. Find an open metal spot near the middle and feel the temp of it before starting the system, then have someone turn the system on. You should feel it go from room temp to warm and remain that way. If if never goes warm or goes warm and then back to room temp, that confirms a blockage.