Rad fan on when climate control in use??

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  • ralleyquattro
    S2Forum Maniac
    • Oct 2007
    • 536
    • Home: Poland Current: Canada

    #1

    Rad fan on when climate control in use??

    when the climate control is on in my S2, in any setting (auto or manual) and regardless if it calls for A/C or not... am I missing something?
    Turn the climate control off (fan to 0) and the rad fan shuts off as well.

    Please help
    www.quattro.ca
    B2: 82 Urq into Sport quattro, 82 4000 2-door, 83 80q 2 Door, 83 Ur-q CDN, 85 Ur-q Euro with 3B, 86 4kq, 59,000km
    B3/B4: 91 CQ, 93 90q 2.5TDI, 94 80q avant 2.5tdi, 94 S2 Avant
  • Mikes2
    S2Forum Extremist
    • Jul 2003
    • 1704
    • Country: Scotland

    #2
    Sounds normal. should be running speed 1.
    Mike

    http://www.s2-audi.co.uk

    Comment

    • Pirvu Eugen
      S2Forum Extremist
      • Apr 2007
      • 1978
      • Country: Romania

      #3
      Only with compressor on!
      On econ mode, should be off.

      Comment

      • ralleyquattro
        S2Forum Maniac
        • Oct 2007
        • 536
        • Home: Poland Current: Canada

        #4
        That is what I would expect but it is on all the time while CC is on (and a/c off)

        Thanks
        www.quattro.ca
        B2: 82 Urq into Sport quattro, 82 4000 2-door, 83 80q 2 Door, 83 Ur-q CDN, 85 Ur-q Euro with 3B, 86 4kq, 59,000km
        B3/B4: 91 CQ, 93 90q 2.5TDI, 94 80q avant 2.5tdi, 94 S2 Avant

        Comment

        • Pirvu Eugen
          S2Forum Extremist
          • Apr 2007
          • 1978
          • Country: Romania

          #5
          That fan speed is controlled by afterrun relay and clima unit.
          If the rad stops with clima off...then, the afterrun works ok.

          Comment

          • Pirvu Eugen
            S2Forum Extremist
            • Apr 2007
            • 1978
            • Country: Romania

            #6
            Can you try another known good working clima head?

            Comment

            • M_GORDON
              S2Forum Extremist
              • Oct 2008
              • 1295
              • Home: Isle of Man Current: Vatican City State

              #7
              I'm bored with it.
              A/C compressor off (manual) and I put the climate control on 20ºC; the Rad Fan is OFF. But If I select more than this temp. >20ºC the Rad Fan turns ON and the coolant temp goes from around 85/91ºC to 80ºC or less.
              I think than´s not normal, that isn't correct. True?
              photobucket SUCKS
              sigpic

              Comment

              • M_GORDON
                S2Forum Extremist
                • Oct 2008
                • 1295
                • Home: Isle of Man Current: Vatican City State

                #8
                8 month and none have any idea?
                photobucket SUCKS
                sigpic

                Comment

                • macspring
                  S2Forum Zealot
                  • Mar 2005
                  • 6371
                  • Home: Ireland Current: Wallis & Futuna

                  #9

                  A/C compressor off (manual) and I put the climate control on 20ºC; the Rad Fan is OFF.

                  But If I select more than this temp. >20ºC the Rad Fan turns ON and the coolant temp goes from around 85/91ºC to 80ºC or less.

                  I think than´s not normal, that isn't correct. True?
                  imho, it's not normal, the factory would not have designed it that way. Engine should retain a steady temperature once it warms up regardless of what accessories it's running.

                  Sorry I can't be of more help with the cure.





                  Last edited by macspring; 4 November 2016, 16:09.

                  Comment

                  • macspring
                    S2Forum Zealot
                    • Mar 2005
                    • 6371
                    • Home: Ireland Current: Wallis & Futuna

                    #10
                    Originally posted by M_GORDON

                    8 month and none have any idea?
                    I was waiting for someone else to go first.






                    Comment

                    • M_GORDON
                      S2Forum Extremist
                      • Oct 2008
                      • 1295
                      • Home: Isle of Man Current: Vatican City State

                      #11
                      I try with 2 modules, I try adjusting some values of internal controls etc. And nothing.

                      Firstly I thought if I reppaired with one chanel (don't remember who) adjust. Because at first, my fan turns ON with only 19ºC on the C. Control and last with 23ºC.
                      But some month later and battery recharge; now with 20ºC not, but with required 21ºC , the Fan already turns on.
                      And watter goes cooled and I colder (hahahahaha)

                      PS: I try, prove with non OEM thermostat and with 2 originals
                      photobucket SUCKS
                      sigpic

                      Comment

                      • Jiri
                        S2Forum Addict
                        • Dec 2011
                        • 254
                        • Country: Belgium

                        #12
                        Originally posted by ralleyquattro
                        when the climate control is on in my S2, in any setting (auto or manual) and regardless if it calls for A/C or not... am I missing something?
                        Turn the climate control off (fan to 0) and the rad fan shuts off as well.

                        Please help
                        Did you find the problem?
                        I was looking at some electrical diagrams but don't find what it could be.
                        is there a way to test the climate control panel for a good working?

                        Comment

                        • ralleyquattro
                          S2Forum Maniac
                          • Oct 2007
                          • 536
                          • Home: Poland Current: Canada

                          #13
                          Sorry, I did not, do not have a spare head unit to try yet.

                          Panel works ok.. sometimes I can not lower or increase temp, like the buttons do not work, and then works all good.

                          Must be the control unit.
                          www.quattro.ca
                          B2: 82 Urq into Sport quattro, 82 4000 2-door, 83 80q 2 Door, 83 Ur-q CDN, 85 Ur-q Euro with 3B, 86 4kq, 59,000km
                          B3/B4: 91 CQ, 93 90q 2.5TDI, 94 80q avant 2.5tdi, 94 S2 Avant

                          Comment

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