1998 Honda CRV 5 second Hissing sound behind the glove box

1998 HONDA CRV
176,000 MILES • 4 CYL • 4WD • AUTOMATIC
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BIGMILLZ
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While I was out of town my wifes 98 crv's A/C compressor clutch started to click on and off when at idle. If she pushed on the gas just a little it would stop. It was also idleing at 500 or sometimes below. I told her I would check the idle when I got home.

Well my genius brother came over and told her the freon was low. Then he put 134a in the system without a gauge. She drove it 2 or 3 times and when I got home it was blowing warm air and was way overcharged when I put my guage on it. I evacuated it until it was right. The air is cold again and the clutch is not clicking on and off anymore but there is a 5 second hissing sound behind the glovebox. It happens often while running the A/C and when I turn it off.
May 23, 2008 at 8:18 AM
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KHLOW2008
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Looks like the expansion valve is the culprit.

When the idle is too low the compressor will also cut off.
May 26, 2008 at 9:21 AM