Air condition not cold

2001 PONTIAC GRAND PRIX
180,000 MILES • 3.8L • V6 • 2WD • AUTOMATIC
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YOUNGSNETWORK
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I tried to use acpro to boost my ac because it's cool not cold. I followed all directions but when I plug it up it goes to the red. The compressor is coming on when I turn the AC on. I can see it spinning. I wanted ask if the low coolant light would have some affect on this? The coolant level is fine but someone told me it's the radiator level sensor causing the light to come on. I'm putting a new one on soon, but would that affect the acpro to go to red. If not what could it be? Thanks
May 22, 2019 at 3:03 AM
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ASEMASTER6371
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Good morning,

No, they have nothing to do with it.

What is the pressure on the gauge?

What is the outside temperature?

Roy
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May 22, 2019 at 3:20 AM
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YOUNGSNETWORK
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In the middle of the red. Starts at 60 ends at 150. So I guess 105. Outside about 90 degrees.
May 23, 2019 at 11:14 AM
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ASEMASTER6371
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That is high. The pressure should be at ambient temperature.


Check the diagram I sent you. Check the fuses for power on both sides with the key on.

roy
May 23, 2019 at 11:25 AM
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YOUNGSNETWORK
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Can you email me that diagram so I can make it bigger?
May 23, 2019 at 12:44 PM
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ASEMASTER6371
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Not a valid e mail

Roy
May 23, 2019 at 12:49 PM
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YOUNGSNETWORK
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[email protected]
May 23, 2019 at 12:51 PM
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YOUNGSNETWORK
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same one on file.
May 23, 2019 at 12:52 PM
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ASEMASTER6371
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Sorry, need another email. That one does not work for me.

Roy
May 23, 2019 at 1:02 PM
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YOUNGSNETWORK
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checked fuses from diagram, all of they are good.
May 23, 2019 at 2:54 PM
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ASEMASTER6371
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Did you verify power on both sides with a test light?

Roy
May 23, 2019 at 2:55 PM
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YOUNGSNETWORK
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yes.
May 23, 2019 at 2:59 PM
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ASEMASTER6371
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Can you go to the relay and remove it and check for power on two terminals with the key on?

Roy
May 23, 2019 at 3:10 PM
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YOUNGSNETWORK
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Two have power, and two of them don't have power.
May 23, 2019 at 3:20 PM
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ASEMASTER6371
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Okay, when you turn on the AC can you hear the relay click? Install the relay before doing this.

Roy
May 23, 2019 at 3:23 PM
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YOUNGSNETWORK
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It's just me. The relay is under the hood.
May 23, 2019 at 3:25 PM
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ASEMASTER6371
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Can you hear it click? Trying to see if the PCM is grounding the control side of the relay.

Better, turn the key on, go under the hood to the relay and remove it. Then install it and see if it clicks.

Roy
May 23, 2019 at 3:31 PM
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YOUNGSNETWORK
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I tried it with key on and AC off, no click. Key on with AC on, no click.
May 23, 2019 at 3:39 PM
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ASEMASTER6371
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Okay, the PCM is not grounding the control side.

Go to the pressure switch on the AC line and see if there is power in the connector.

Roy
May 23, 2019 at 3:42 PM
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YOUNGSNETWORK
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where is it?
May 23, 2019 at 3:47 PM
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ASEMASTER6371
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On the dryer or the accumulator on the AC line. It is a three wire switch.

Roy
May 23, 2019 at 3:51 PM
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YOUNGSNETWORK
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What if that has power? It's looking like I might have to take it in. What do you think?
May 23, 2019 at 4:10 PM
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ASEMASTER6371
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Does it have power? You need power to it for a signal to be sent to the PCM to energize the relay.

You may have a bad switch.

Roy
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May 23, 2019 at 4:13 PM
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YOUNGSNETWORK
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but AC is working, it's just not real cold.
May 23, 2019 at 4:15 PM
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ASEMASTER6371
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Okay, the low side is still 50 while running?

Roy
May 23, 2019 at 4:16 PM
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YOUNGSNETWORK
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I don't know. Soon as I plug in the AcPro, it goes to red. Instructions say something is wrong if it goes to red. See Mechanic.
May 23, 2019 at 4:23 PM
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ASEMASTER6371
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That means either the compressor is not working or the expansion valve/orifice tube needs to be replaced.

Roy

May 23, 2019 at 4:26 PM
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YOUNGSNETWORK
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Can the compressor not be working and still spin?
May 23, 2019 at 4:30 PM
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ASEMASTER6371
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It can turn but not produce pressure.

Roy
May 23, 2019 at 4:37 PM
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YOUNGSNETWORK
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I'm not a mechanic, I better take it in. Thanks for all your help. Excellent customer service.
May 23, 2019 at 4:40 PM
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STRAILER
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Please let us know what you find. We are interested to see what it is.
May 23, 2019 at 5:24 PM
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YOUNGSNETWORK
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Okay.
May 23, 2019 at 7:25 PM
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ASEMASTER6371
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You are welcome.

We are always glad to help.

Roy
May 24, 2019 at 5:01 AM
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YOUNGSNETWORK
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You are not going to believe this. Too much Freon. Vacuumed system and put right portion in, now cold as Ice. Thanks again for all your help.
May 24, 2019 at 3:17 PM
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ASEMASTER6371
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You are welcome.

Always glad to help.

Roy
May 24, 2019 at 3:20 PM
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B.MEIER_NAVARRE
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Air Conditioning problem
2001 Pontiac Grand Prix 6 cyl Front Wheel Drive Automatic

I have the dual climate controls in mycar. The passenger side blows very cold, the driver side is much warmer. I added refridgerant and it just made the passenger side colder. Why is the driver side so much warmer and how do I fix it?
Thanks in advance for the help.
May 26, 2019 at 12:47 PM (Merged)
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JAMESVOGEL15
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One thing i would check to make sure of is the the temp slider is functioning see if it changes from hot to cold normally or if it seems to be stuck at one point.
If not that then id try to see if there is a air leak in the vents.
May 26, 2019 at 12:47 PM (Merged)
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NICHOLAS7
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My heater blows warm air on the passenger side vents, floor and defrost but it takes awhile. It blows cold air on the drivers side vent and floor. My question is what's causing this and how can i fix it.
May 26, 2019 at 12:48 PM (Merged)
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MERLIN2021
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Heater Core — Plugged

WARNING: The heater core inlet hose will become too hot to handle if the system is working correctly.

Check to see that the engine coolant is at the correct level.
Start the engine and turn on the heater.
When the engine coolant reaches operating temperature, feel the heater core inlet and outlet hose to see if they are hot.
If the inlet hose is not hot:

the thermostat is not working correctly.
If the outlet hose is not hot:

the heater core may have an air pocket.
the heater core may be restricted or plugged.
If both are hot, the temperature blend door in the heater plenum may be broken or stuck...
May 26, 2019 at 12:48 PM (Merged)
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SAVAGE208
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Heater problem
2001 Pontiac Grand Prix 6 cyl Automatic 82000 miles

My heater and ac do not work on dial settings 1-4, but on 5 it works. In addition, when i change the dial the headlights turn off.
May 26, 2019 at 12:48 PM (Merged)
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MMPRINCE4000
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If you are talking about fan motor, then most likely the fan switch is bad, replace it.
May 26, 2019 at 12:48 PM (Merged)