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Replaced ac compressor in 2015 along with new drier, orifice tube, and temp sensor.  Added dye for future issues.  Had no issues recharging system at the time.

 

I just got the ”low refrigerant a/c off” notice.  Found leak at low pressure switch.  (pag oil and dye all over it)  Replaced with new ACDelco OEM switch and replaced shrader valve. 

 

Check everywhere else with UV light for leaks.  Found no evidence of leaks at compressor, lines, or fittings.  Pulled vacuum.  Trying to recharge.  Compressor won’t engage.  Clutch moves freely.  Swapped AC relay, clutch still won’t engage.  Jumped relay (pins 30/87), clutch engages and spins but system will not take charge.

 

If I can get the clutch to engage by jumping, what is preventing system from drawing in refrigerant?  What am I missing?  Thanks.

Jeff

98 Concours

90 Seville

04 Corvette

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Hello

You need to clear the code.

When the freon gets too low while the system is on it locks out the compressor.

Use the onboard diagnostics to clear it.

Hold the climate control off and passenger warmer buttons for 3 seconds

Let the codes cycle on the display.

Fan down will run through the modules.

Fan up enters the module (ACM IIRC) like the 4th one you will see

fan down until it comes up clear codes

fan up to confirm.

Hit the recirc button and it should exit the diagnostics.

If I am off a little on the steps I apologize, late day.

Welcome to CaddyInfo

GM FAN FOREVER

Nice, clean, luxury= fine automobile

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Ok 

Have you tried leaving the can open while clearing the code? 

I am spoiled in that I have a Recovery machine. I can see exactly what the pressures are. And I can use the machine to push the refrigerant into the system

GM FAN FOREVER

Nice, clean, luxury= fine automobile

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FIXED!  Turns out no system problems at all.  I had the hoses overtightened on the cheapo Harbor Freight gauges (that I've used several times without issue), and that was stopping flow of refrigerant.  Would have never known except I found someone else had this issue with these gauges.  Reset all connections and system took full charge.  Nice and cold air and compressor cycles normally.   Whew!  Thanks again.

Jeff

98 Concours

90 Seville

04 Corvette

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Excellent. 

Do not trust harbor freight gauges. I speak from experience. They carry alot of good stuff but that is not

GM FAN FOREVER

Nice, clean, luxury= fine automobile

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