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clicking noise from heater

Discussion in 'A4/S4 forum(B5 Chassis)' started by rasA4, Jan 21, 2008.

  1. rasA4
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    rasA4 Four Rings Mafia Specialist

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    [Jan 21, 2008]
    hi all
    im getting a clicking noise from the climate/heater area it sounds more a small motor clicking even if the climate is off.
    :think:
    any ideas guys?
    #1
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  3. Nessy
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    Nessy VW + Audi mad

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    [Jan 22, 2008]
    There's a multitude of motors controlling the heater flaps within the vents and it might be that one is sticking or otherwise not be performing as it should...
    If you can get the climate control panel into diagnostic mode you should be able to see if it throws up an error code which may help identify the fault.
    #2
  4. auroan
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    auroan Active Member

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    [Jan 22, 2008]
    I've got a similar problem. When I install my parrot 31K kit I'm gonna have most of the dash out anyway, so fingers cross I'll be able to spot the problem. I'll let you know what I find.
    #3
  5. andybnwc
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    andybnwc Member

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    [Jan 22, 2008]
    it sounds like the main flap behind the motor its self listen under the glove box ,its behind the blower
    #4
  6. rasA4
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    rasA4 Four Rings Mafia Specialist

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    [Jan 22, 2008]
    any ideas how i can do this?
    #5
  7. Nessy
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    Nessy VW + Audi mad

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    [Jan 23, 2008]

    Here's a a tech resource article I've cut and pasted from the Audiworld site, its a good thing to have a copy of printed off and kept in the glovebox,lol.
    As well as giving diagnostic trouble-shooting codes you can also use this info to get the climate control panel to do nifty things like display your exact speed (in km/h tho).
    A while ago there were chancers charging 99p on Ebay for this very info,lol.



    Unlocking the Secrets within the Climate Control Panel


    Changing Degree Temperature Display

    Press and hold the recirculation button. Then press the temperature up ("+") button to switch between degrees Celsius & Fahrenheit on the Climate Control Temperature and Instrument Panel Outside Temperature displays.

    Accessing On-Board Diagnostic codes

    Press and hold the recirculation button. Then press the manual flow control up arrow. You should see a 1c. Press the temperature up ("+") or down ("-") buttons to select a code number. Then press the recirculation button again. The value should display. Press the temperature up or down button again to display another code.

    NOTE: Air Flow Motor (V 71) and Potentiometer (G 113) are not installed in USA/Canada vehicles. Disregard values displayed for these components.
    Code Displayed Value
    1 System malfunction - displayed as a Diagnostic Trouble Code (DTC), see chart below
    2 Digital value of Interior Temperature Sensor, in Headliner (G 86)
    3 Digital value of Interior Temperature Sensor, in Instrument Panel (G 56)
    4 Digital value of Fresh Air Intake Duct Temperature Sensor (G 89)
    5 Digital value of Outside Air (Ambient) Temperature Sensor (G 17), front
    6 Digital value of Outside Air (Ambient) Temperature Sensor
    7 Digital value of Ambient Temperature Sensor At Fresh Air Blower (G 109)
    8 Digital value of Temperature Regulator Flap Motor Potentiometer (G 92)
    9 Delta value of Temperature Regulator Flap
    10 Non-corrected specified value of Temperature Regulator Flap
    11 Digital value of Central Flap Motor Potentiometer (G 112)
    12 Specified value of Central Flap
    13 Digital value of Footwell/Defroster Flap Motor Potentiometer (G 114)
    14 Specified value of Footwell/Defroster Flap
    15 Digital value of Air Flow Flap Motor Potentiometer (G 113)
    16 Specified value of Air Flow Flap
    17 Vehicle Speed (km/h)
    18 Actual Air Blower voltage (Volts)
    19 Specified Fresh Air Blower voltage (Volts)
    20 A/C Compressor (A/C Clutch) voltage (Volts)
    21 Number of low voltage occurrences, non-transient
    22 Cycle condition of A/C Refrigerant High Pressure Switch (F 118)
    23 Cyclings of the A/C Refrigerant High Pressure Switch (F 118)
    24 Cyclings of the switches, absolute non-fluctuating
    25 Analog/Digital value, Kick-Down Switch
    26 Analog/Digital value, Engine Coolant Temperature (ECT) Warning Light
    27 Coding value
    28 Engine Speed (RPM)
    29 A/C Compressor speed in rpm (Equals Engine Speed x 1.28)
    30 Software version
    31 Display check (all segments of A/C Control Head display light up)
    32 Potentiometer malfunction counter, Temperature Regulator Flap
    33 Potentiometer malfunction counter, Central Flap
    34 Potentiometer malfunction counter, Footwell/Defroster Flap
    35 Potentiometer malfunction counter, Air Flow Map
    36 Feedback value, cold end-stop, Temperature Regulator Flap Motor Potentiometer (G 92)
    37 Feedback value, hot end-stop, Temperature Regulator Flap Motor Potentiometer (G 92), max. stop
    38 Feedback value, cold end-stop, Central Flap Motor Potentiometer (G 112)
    39 Feedback value, hot end-stop, Central Flap Motor Potentiometer (G 112)
    40 Feedback value, cold end-stop, Footwell/Defroster Flap Motor Potentiometer (G114)
    41 Feedback value, hot end-stop, Footwell/Defroster Flap Motor Potentiometer (G114)
    42 Feedback value, cold end-stop, Air Flow Map Motor Potentiometer (G 113)
    43 Feedback value, hot end-stop, Air Flow Map Motor Potentiometer (G 113)
    44 Vehicle operation cycle counter
    45 Calculated interior temperature (internal software, in digits)
    46 Outside (ambient) temperature, filtered, for regulation (internal software)
    47 Outside (ambient) temperature, unfiltered, (internal software, in deg C)
    48 Outside (ambient) temperature, unfiltered, (in digits)
    49 Malfunction counter for speedometer (vehicle speed) signal
    50 Standing time (in minutes)
    51 Engine Coolant Temperature (ECT) in deg C
    52 Graphics channel 1 - A/C compressor switch-off conditions are identified by illuminated segments of the "88.8" display. See chart below.
    53 Graphics channel 2 - Climate system electrical outputs are identified by illuminated segments of the "88.8" display. See chart below.
    54 Control characteristics
    55 Outside (ambient) temperature, in deg C or deg F depending on setting on A/C control head
    56 Temperature in deg C, from Interior Temperature Sensor, in Headliner (G 86)
    57 Temperature in deg C, from Interior Temperature Sensor, in Instrument Panel (G 56)
    58 Temperature in deg C, from Fresh Air Intake Duct Temperature Sensor (G 89)
    59 Temperature in deg C, from Outside Air (Ambient) Temperature Sensor (G 17), front
    60 Temperature in deg C, from Ambient Temperature Sensor At Fresh Air Blower (G 109)
    61 Software version (latest)




    --------------------------------------------------------------------------------
    Diagnostic Trouble Code Meanings
    Diagnostic Trouble
    Code (Sensor) Malfunction Description
    00.0 No malfunction present
    02.1 (G86) Interior Temperature Sensor, in Headliner, static open, *02.1 (see below)
    02.2 Interior Temperature Sensor, in Headliner, static short, see 02.1
    02.3 Interior Temperature Sensor, in Headliner, sporadic open
    02.4 Interior Temperature Sensor, in Headliner, sporadic short
    03.1 (G56) Interior Temperature Sensor, in Instrument Panel, static open, see 02.1
    03.2 Interior Temperature Sensor, in Instrument Panel, static short, see 02.1
    03.3 Interior Temperature Sensor, in Instrument Panel, sporadic open
    03.4 Interior Temperature Sensor, in Instrument Panel, sporadic short
    04.1 (G89) Fresh Air Intake Duct Temperature Sensor, static open, *04.1 (see below)
    04.2 Fresh Air Intake Duct Temperature Sensor, static short, see 04.1
    04.3 Fresh Air Intake Duct Temperature Sensor, sporadic open
    04.4 Fresh Air Intake Duct Temperature Sensor, sporadic short
    05.1 (G17) Outside Air (Ambient) Temperature Sensor, front, static open, *05.1 (see below)
    05.2 Outside Air (Ambient) Temperature Sensor, front, static short, see 05.1, *05.2 (see below)
    05.3 Outside Air (Ambient) Temperature Sensor, front, sporadic open
    05.4 Outside Air (Ambient) Temperature Sensor, front, sporadic short
    06.1 (G110) Engine Coolant Temperature (ECT), A/C static open, *06.1 (see below)
    06.2 Engine Coolant Temperature (ECT), A/C static short, see 06.1
    06.3 Engine Coolant Temperature (ECT), A/C sporadic open
    06.4 Engine Coolant Temperature (ECT), A/C sporadic short
    07.1 (G109) Ambient Temperature Sensor at Fresh Air Blower, static open, *07.1 (see below)
    07.2 Ambient Temperature Sensor at Fresh Air Blower, static short, see 07.1
    07.3 Ambient Temperature Sensor at Fresh Air Blower, sporadic open
    07.4 Ambient Temperature Sensor at Fresh Air Blower, sporadic short
    08.1 (G92) Temperature Regulator Flap Motor Potentiometer, static open, *08.1 (see below)
    08.2 Temperature Regulator Flap Motor Potentiometer, static short, see 08.1
    08.3 Temperature Regulator Flap Motor Potentiometer, sporadic open
    08.4 Temperature Regulator Flap Motor Potentiometer, sporadic short
    08.5 Temperature Regulator Flap, static block, *08.5 (see below)
    08.6 Temperature Regulator Flap Motor Potentiometer, malfunction
    08.7 Temperature Regulator Flap, sporadic block
    11.1 (G112) Central Flap Motor Potentiometer, static open, *11.1 (see below)
    11.2 Central Flap Motor Potentiometer, static short, see 11.1
    11.3 Central Flap Motor Potentiometer, sporadic open
    11.4 Central Flap Motor Potentiometer, sporadic short
    11.5 Central Flap, static block, *11.5 (see below)
    11.6 Central Flap Motor Potentiometer, malfunction
    11.7 Central Flap, sporadic block
    13.1 (G114) Footwell/Defroster Flap Motor Potentiometer, static open, *13.1 (see below)
    13.2 Footwell/Defroster Flap Motor Potentiometer, static short, see 13.1
    13.3 Footwell/Defroster Flap Motor Potentiometer, sporadic open
    13.4 Footwell/Defroster Flap Motor Potentiometer, sporadic short
    13.5 Footwell/Defroster Flap, static block, *13.5 (see below)
    13.6 Footwell/Defroster Flap Motor Potentiometer, malfunction
    13.7 Footwell/Defroster Flap, sporadic block
    15.1 (G113) Air Flow Flap Motor Potentiometer, static open, *15.1 (see below)
    15.2 Air Flow Flap Motor Potentiometer, static short, see 15.1
    15.3 Air Flow Flap Motor Potentiometer, sporadic open
    15.4 Air Flow Flap Motor Potentiometer, sporadic short
    15.5 Air Flow Flap, static block, see *15.5 (see below)
    15.6 Air Flow Flap Motor Potentiometer, malfunction
    15.7 Air Flow Flap, sporadic block
    17.0 Vehicle Speed Signal faulty
    18.1 Fresh air blower voltage, static
    18.3 Fresh air blower voltage, sporadic
    20.1 A/C compressor voltage not OK - static, *20.1 (see below)
    20.3 A/C compressor voltage not OK - sporadic
    22.1 (F118) A/C Refrigerant High Pressure Switch, static open, *22.1 (see below)
    22.3 A/C Refrigerant High Pressure Switch, sporadic open
    22.5 A/C Refrigerant High Pressure Switch, 120X open, *22.5 (see below)
    29.1 Belt slip detection "soft", static
    29.2 Belt slip detection "hard", static
    29.3 Belt slip detection "soft", sporadic
    29.4 Belt slip detection "hard", sporadic

    Diagnostic Trouble Code Notes: *02.1 Digital default value of 128 is programmed if sensor fails
    *04.1 Value supplied by Temp. Sensor is used if sensor fails
    *05.1 Value supplied by Temp. Sensor is used if sensor fails
    *05.2 Digital default value of 128 is programmed if sensors G89 & G17 both fail
    *06.1 Engine Coolant Temperature is calculated is sensor should fail or is not installed; diagnosis occurs only above 0 degrees Celsius
    *07.1 Programmed corrective value = 0
    *08.1 Temperature Regulator Flap Motor will no longer be controlled automatically; manual adjustment only
    *08.5 Motor is cycled; software attempts to eliminate block
    *11.1 Central Flap Motor will no longer be controlled automatically; manual adjustment only
    *11.5 Motor is cycled; software attempts to eliminate block
    *13.1 Footwell/Defroster Flap Motor will no longer be controlled automatically; manual adjustment only
    *13.5 Motor is cycled; software attempts to eliminate block
    *15.1 Digital value is internally programmed for limp-home mode
    *15.5 Motor is cycled; software attempts to eliminate block
    *20.1 Compressor remains off until voltage is greater than 10.8V for at least 25 seconds
    *22.1 Compressor remains off until switch closes
    *22.5 Compressor re-engagement circuit, VAG 1551 Scan Tool function



    --------------------------------------------------------------------------------
    OBD Channel 52 - A/C Compressor switch-off codes

    If an A/C compressor switch-off condition exists, a segment of the "88.8" display, indicated below as an alpha-numeric code, will illuminate.
    Segment Condition
    a1 Slippage or blockage, A/C Refrigerant High Pressure Switch, 120x off
    b1 Engine Speed (RPM) less than 200 - 500
    c1 Engine Speed (RPM) greater than 6000
    d1 Engine Speed (RPM) greater than 6000
    e1 System function OK
    f1 System function OK
    a2 A/C manually switched off (A/C standby canceled)
    b2 low voltage
    c2 Kick-down switch, compressor off for 12secs max.
    d2 Engine Coolant Temperature (ECT) warning light switched
    e2 A/C Refrigerant Low Pressure Switch (F73)
    f2 A/C Refrigerant High Pressure Switch (F118)
    a3 ECON mode selected
    b3 OFF selected
    c3 Outside (ambient) temperature too low
    d3 Engine management system (compressor will remain off for 3 -12 seconds)
    e3 High pressure occurrences more than 30 times
    f3 Ambient Temperature Sensor at Fresh Air Blower (G109) less than 27 degF (-3 degC)
    g1,g2,g3 System function OK (g1+g2+g3 must illuminate simultaneously to indicate system is OK)
    Decimal Point
    Lit A/C compressor ON
    Decimal Point
    Unlit A/C compressor OFF



    --------------------------------------------------------------------------------
    OBD Channel 53 - Climate system electrical output codes

    When a NO system electrical output is activated, a segment of the "88.8" display, indicated below as an alpha-numeric code, will illuminate. The decimal point in the "88.8" display will not illuminate in this channel.
    Segment Condition
    a1 Fan for interior temperature sensor
    b1 Fresh air/recirculation flap closed (recirculation mode)
    c1 Heater valve closed
    d1 Bi-directional wiring harness
    e1 A/C compressor ON
    f1 coolant fan first speed ON
    a2 Air flow flap open
    b2 Air flow flap open
    c2 Air flow flap closed
    d2 Footwell/Defroster flap in "Footwell" position
    e2 Footwell/Defroster flap in "Footwell" position
    f2 Footwell/Defroster flap in "Defroster" position
    a3 Central flap in "instrument panel outlet" position
    b3 Central flap in "instrument panel outlet" position
    c3 Central flap in "footwell outlet/defrost" position
    d3 Temperature flap in "cold air" position
    e3 Temperature flap in "cold air" position
    f3 Temperature flap in "warm air" position
    g1,g2,g3 System function OK (g1+g2+g3 must illuminate simultaneously to indicate system is OK)
    #6
  8. rasA4
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    rasA4 Four Rings Mafia Specialist

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    [Sep 4, 2008]
    finally got round to working on the car to sort this annoying problem out, Nessy i have checked the error codes via your method, unfortunatley it didnt bring up any errors.

    i would like to thank Byzan A4 for his help.

    the problem became clear when i took the centre console off, i could see the 'red' air positioning flap moving by itself with the ignition on.

    here are some pics
    [​IMG]

    [​IMG]

    [​IMG]

    the dreaded motor can be seen here
    [​IMG]

    after a lot of further bolts removed on the centre console mainframe and got a mould grip to remove the aluminium bar so i could finally move the main plastic heater pipe off so i could take out the air positioning flap motor OUT!!!!!
    [​IMG]


    its out
    [​IMG]

    managed to open it as well
    [​IMG]
    [​IMG]

    now i have to find a replacement or change the little motor
    #7
  9. rasA4
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    rasA4 Four Rings Mafia Specialist

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    [Sep 5, 2008]
    just had a quote from audi they want £80 +vat for the part
    #8
  10. auroan
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    auroan Active Member

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    [Sep 5, 2008]
    I may be able to supply you one, if the one of a 96 will fit a 2000
    #9
  11. rasA4
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    rasA4 Four Rings Mafia Specialist

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    [Sep 5, 2008]
    LOOKS LIKE I HAVE WASTED MY TIME SPOKE TO A GUY AT VAG PARTS HE SAYS THE MOTOTR IS PROBABLY NOT FAULTY SOME OTHER SENSOR.
    i was gonna check this out before hand with my vag.com and laptop however my xp laptop is not working probably so i took a chance in locating the motor.
    i am really annoyed with myself now
    #10
  12. Broken Byzan
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    Broken Byzan Photographic Moderator Staff Member Moderator VCDS Map User

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    [Sep 5, 2008]
    seeing as the car is in bits it may be worth locating a used one the try for the timebebing so you can get the car together with a known working one?

    The temp sensors are located at the top of the dash, in the air flow somewhere and in the aircon HU iirc
    #11
  13. rasA4
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    rasA4 Four Rings Mafia Specialist

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    [Sep 5, 2008]
    cheers m8 i gonna have another go with the laptop and get the vag.com working, i assume there is more than 1 sensor, the longer i leave it im sure i will forget how to put it all back!
    #12
  14. AUDI TURBO
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    AUDI TURBO Member

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    [Sep 7, 2008]
    while on subject of air unit could someone help me with this.................... my audi is the first car ive had with aircon and for some strange reason my windows will NEVER demist without the aircon on no matter waht temp you set it at the onl way to clear the front screen is running bloody aircon not ideal when stuck in town traffic etc most of the time. my old cars just wipped it on full blast and cleared the screen. if it raining outsiode it makes it 10 times worse air con on with the front windscreen setting switched on??
    #13
  15. flatfour
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    flatfour New Member

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    [Sep 7, 2008]
    I have a similar problem on my S4 and when scanned with VAG COM i get 01274 Air Flow Flap Positioning Motor ( V71 ) faulty/blocked!!

    Is this the same DTC code you got?
    #14
  16. rasA4
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    rasA4 Four Rings Mafia Specialist

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    [Sep 7, 2008]
    hi flatfour, i managed to get the laptop working after 4 attempts to fire it up!!!
    when i plugged the flap motor back in yesterday afternoon the bloddy motor seemed ok not making any noise really behaving itself!! SODS LAW !!!!!

    anyway i scanned it no faults came up.
    i did read somewhere where someone had the problem you have and it gradually got better probably a dried leaf or something must have broken up eventually.

    may be clear the errors and see if it comes back?? im no way an expert on this may be someone else can confirm?
    #15

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