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heat loss

Discussion in 'Audi S4/A4/A4 Cab (B7 Chassis)' started by bez101, May 19, 2012.

  1. bez101
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    bez101 Yorkshire & Humber Rep. Regional Rep VCDS Map User

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    [May 19, 2012]
    2005 B7 tdi
    temp at 90 checked in vcds all ok
    no fault codes
    very little heat through vents all flaps ok etc
    gets upto temp as normal not slow
    any ideas ?
    TIA
    #1
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  3. Wrath
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    Wrath Well-Known Member

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    [May 19, 2012]
    Yep, your heater core is either full of **** or on it's way out. I had the same problem but couldn't get both tubes off the heater core so ended up flushing the whole coolant system and refilling. It worked. Refilled with Audi G12++ bottles from ebay.
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  4. bez101
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    bez101 Yorkshire & Humber Rep. Regional Rep VCDS Map User

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    [May 20, 2012]
    hmm when its up at full temp and hear turned on i get normal hot air
    withing a few mins its going cold again
    so turn it off for 5 mins back on and same thing heat then cold
    ****in thing
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  5. Wrath
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    Wrath Well-Known Member

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    [May 20, 2012]
    That's what I had. It may be you have some air trapped in the system.
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  6. NHN
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    NHN Retrofitter - Audi - VW - Skoda - Seat Site Sponsor VCDS Map User

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    [May 22, 2012]
    If you set the air to different directions to say feet, face, screen, does it then blow hot in any of those positions, wonder if its a flap issue, do a basic setting to reset the flaps, but strange blows hot then cold afterwards.
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  7. bez101
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    bez101 Yorkshire & Humber Rep. Regional Rep VCDS Map User

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    [May 22, 2012]
    1st thing i did vcds and checked all flaps
    all ok
    im gona try bleeding it and then flushing the heater
    #6
  8. NHN
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    [May 22, 2012]
    Then I would have to agree atm, thats your best way forward for now mate, hope its an easy fix.
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  9. raffhussain
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    raffhussain Member

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    [May 24, 2012]
    defo heater core needs flushing. i has the same problem. would start warm and the cool down. it happended to me in winter and it was ****ing freezing. lol. flushed the heater core and took for a drive and boom heat. no let me down since. give it a try, nothing to loose. Hope you get it sorted
    #8

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