I can get the greatest help here and this is a pretty basic question for some of the minds on this board. Ahead of time, I apologize for the issue being Non Volvo related, but the Honda boards have folks with attitude seems like, not nice like you guys.

My daughter's CRV AC works properly when idling and at low speeds. Low side pressure is normal. When the vehicle gets up over 35 MPH, the compressor stops running. I looked under the hood with the car idling and the AC does work properly, but when I get the RPM's up to about 3000, it seems the clutch starts hesitating and slipping when the RPM's die down to idle, then as it idles it runs fine.

Does this sound like a freon pressure issue, electrical, or is the clutch going sour? BTW, it is the original compressor and has 150K on it.

Please forgive me for a non Volvo question but I could use some advice. Also, the accessory fans kick off and on just fine.
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93' 240 Classic Wagon 220K & 92' 740 Wagon Regina/Rex 90K

Turns out that not only was the compressor clutch going out, the low pressure switch was bad as well.

She is going again after the repair. Thanks to all who helped me you guys rock!
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93' 240 Classic Wagon 220K & 92' 740 Wagon Regina/Rex 90K

Hello,

Most likely the clutch gap has increased. This can be adjusted using shim (washer of determined thickness) located within the clutch spindle.

Clutch gap can be measured by inserting a feeler gauge between the clutch and the pulley (ENGINE OFF). Generally the gap should be within 0.011 to 0.023 inch (but also depends on compressor make). A larger gap increases the load for the magnetic circuit to lock the clutch thus slipping on higher RPM.

To dismantle the clutch two tools are needed, first a tool to hold the clutch stationary while undoing the clutch bolt, then another tool to pull out the clutch off the spindle. All these tools are available at the AC shop. If there's limited space in engine bay to use these tools, the system must be evacuated first so that the AC compressor could be taken out to do the adjustment.

Check also the electrical connection to the clutch if any corrosion there. Corroded connection can lower the voltage to the magnetic coil causing weak magnetic pull thus slipping.

Hope this helps,
Amarin.

Has it recently been charged? Sounds like maybe over charged.
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Post Back. That's whats makes this forum work.

It was a bit low about a month ago, but it was doing it way before that apparently, as my daughter said the defrost did not work while driving in the winter and had to wipe her windshield with a rag.

I added a little to it to bring it up to 40lbs.
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93' 240 Classic Wagon 220K & 92' 740 Wagon Regina/Rex 90K