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A/C (cooling fan) problem

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    Topic
  • #442731
    bbowden35bbowden35
    Participant

      I have a 2003 Cavalier. Every time when I am at the stop light with the A/C on it will blow out hot air, and it sounds like that it is depressurizing. When I am driving there is cool air. The A/C clutch works, because when it is turned on you can hear it, and there is enough r134a in the system. Please help, thank you.

    Viewing 15 replies - 1 through 15 (of 34 total)
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    • #442746
      bbowden35bbowden35
      Participant

        How do I check the cooling fan?

        #442747
        rice400rice400
        Participant

          Run the engine to about 2000 rpm and hold it till it gets to operating temp and see if the fan comes on. If it doesnt come on and its at operating temp take a voltmeter or a testlight and check to see if you’re getting voltage at the fan

          #442732
          MikeMike
          Participant

            You have an airflow problem….double check fan

            #442748
            John B KobberstadJohn B Kobberstad
            Participant

              Quoted From bbowden35:

              If the cooling fan is not working, then how does the cooling fan turn on with the A/C running?

              When the A/C is turned on the engine cooling fan is energized to stay on until the A/C is turned off.

              #442733
              bbowden35bbowden35
              Participant

                Oh yeah when the A/C is on the temp goes up, and when driving it stabilizes.

                #442749
                rice400rice400
                Participant

                  Quoted From johnbkobb:

                  When the A/C is turned on the engine cooling fan is energized to stay on until the A/C is turned off.

                  Yeah that too!

                  #442734
                  college mancollege man
                  Moderator

                    A+ on the above post. also check to see if the condenser is blocked.
                    use a garden hose to flush through with water

                    #442750
                    rice400rice400
                    Participant

                      Check for voltage at the cooling fan connector blue wire. If you dont have voltage the next thing I would check is the relay. If you do have voltage check the ground and if its good replace the cooling fan

                      #442735
                      MikeMike
                      Participant

                        Did you check your coolant system? Is coolant level full? Sounds like a flow issue. Coolant system needs to operate properly in order for a/c to work correctly.

                        #442751
                        John B KobberstadJohn B Kobberstad
                        Participant

                          Quoted From bbowden35:

                          How do I check the cooling fan?

                          The easiest way is to use a Power Probe III , but if you don’t have one then the
                          easiest way is to disconnect the plug to the fan and use jumper wires from the battery to the fan. It doesn’t matter which wire goes where just don’t let them touch each other. You don’t have to hold them there when you connect them to the fan, if the fan is good it will spin so let the connection go but din’t let the wires touch each other or touch the positive one to ground and disconnect them from battery.

                          #442736
                          John B KobberstadJohn B Kobberstad
                          Participant

                            Quoted From bbowden35:

                            Oh yeah when the A/C is on the temp goes up, and when driving it stabilizes.

                            Are the cooling fan(s) in the engine compartment constantly on when the A/C is on? They should be.

                            #442752
                            rice400rice400
                            Participant

                              fused jumper wires ftw!

                              #442737
                              bbowden35bbowden35
                              Participant

                                Quoted From johnbkobb:

                                Are the cooling fan(s) in the engine compartment constantly on when the A/C is on? They should be.

                                The cooling fan is not on when the A/C is running.

                                #442753
                                John B KobberstadJohn B Kobberstad
                                Participant

                                  Quoted From rice400:

                                  fused jumper wires ftw!

                                  I used to use insulated alligator clips, at both ends (unfused), until I got the PPIII

                                  #442738
                                  MikeMike
                                  Participant

                                    They should be on all the time with your a/c on

                                  Viewing 15 replies - 1 through 15 (of 34 total)
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