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Heater blows cold

Discussion in 'A3/S3/Sportback (8P Chassis)' started by mark7, Aug 12, 2011.

  1. mark7

    mark7 Member

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    Hi guys. turned the temp up on my climate control tonight and it only blows cold/warm, even on 25 deg its not hot.
    Air con is ice cold, but something certainly not right with the heat side of things.
    Any ideas??
     
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  3. audigex

    audigex Active Member

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    How's your coolant level? Was your engine up to temperature?
     
  4. mark7

    mark7 Member

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    Yes. Been driving around a hour, and coolant fine
     
  5. Boydie

    Boydie Boycie
    VCDS Map User

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    Check your fuses

    Thermostat??
     
  6. quattro81

    quattro81 All the gear.. No idea

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    If you have vcds it's worth a plug in... Could be the motorised flap that switches from hot to cold.. Had this recently in mrs golf...
     
  7. salad.dodger

    salad.dodger Member

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    mine did this, thermostat getting stuck but my temp gauge went up.
     
  8. Chappy

    Chappy Call me Dan!
    Audi A5

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    I had the same problem last night, although it did eventually start blowing warm air after having it set on HI for a while, I shall monitor it and get it back to Audi if needed.
     
  9. mark7

    mark7 Member

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    Thanks guys. Temp gauge is reading normal, think i'll start with the thermostat then move on from there if no joy
     
  10. shady-ninja

    shady-ninja Active Member

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    if you change the thermostat and the problem persists the it might br the HEATER EXCHANGE MATRIX.
     
  11. audicruiser

    audicruiser Audi Heaven

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    Sound like a thermostat to me...
     
  12. Khufu

    Khufu Well-Known Member

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    even if its the thermostat jamming open it would eventually heat up. Is it a diesel? mileage? My worst fears concern would be cylinder head gasket being away causing back pressure that stops the circulation of coolant but as gauge is reading fine it could be blocked matrix (feel the pipes in & out of the bulkhead) or a fault with the control panel/flaps as suggested above.
     

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