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Skoda Fabia I 1.9 SDI: Heating Issue, Cold Air from Vents, Thermostat, Clutch Pressure Plate

TomyZ 13833 9
Best answers LABEL_AI_GENERATED

Why does my Skoda Fabia I 1.9 SDI blow only cold air even though the engine reaches 90°C, and could trapped air after clutch replacement be the cause?

Yes — the heating problem was caused by air in the cooling system / low coolant level, and after topping up the coolant the heater worked normally again [#16324097] To confirm coolant is reaching the heater core, check the two ~20 mm heater hoses entering the cabin through the bulkhead; at 90°C they should be hot [#16322963] If the hoses are hot but the vents still blow cold, also inspect the warm/cold flap actuator or linkage inside the HVAC box [#16322910][#16323275]
AI summary based on the discussion. May contain errors.
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  • #1 16322872
    TomyZ
    Level 8  
    Posts: 12
    Rate: 10
    Hello

    I have a problem that my Fabcia does not heat anything at all, i.e. it flies but cool air.
    Engine temperature 90 degrees and here it is cold from the air vents.

    I thought the thermostat, but the temperature indicator on the board shows normal.

    Recently, I had the clutch pressure plate replaced, is it possible that during this repair I do not know, the system may have aerated?

    I am asking for some hints :cry:
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  • #2 16322910
    1megan
    Level 13  
    Posts: 65
    Help: 4
    Rate: 40
    Broken linkage on the knob or on the air control flap.
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  • #3 16322918
    TomyZ
    Level 8  
    Posts: 12
    Rate: 10
    1megan wrote:
    Broken linkage on the knob or on the air control flap.


    I apologize in advance for stupid questions, but I don't know anything about it.

    The knobs seem to be fine, they do not jump in a strange way, the air blows sometimes harder and less depending on the setting of the knob.
    It only blows cold air, not a bit of warm air.
  • #4 16322938
    1megan
    Level 13  
    Posts: 65
    Help: 4
    Rate: 40
    And the heater tubes are both hot?
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  • #5 16322947
    TomyZ
    Level 8  
    Posts: 12
    Rate: 10
    I don't really know where they are, I will search the internet and let me know.
  • Helpful post
    #6 16322963
    piotrekwoj1
    Level 43  
    Posts: 10521
    Help: 947
    Rate: 3433
    See engine side. Two rubber hoses with a diameter of about 20 mm will enter the cabin through the bulkhead wall. Check them if they are hot when you are on the countertop 90 degrees.
  • Helpful post
    #7 16322971
    1megan
    Level 13  
    Posts: 65
    Help: 4
    Rate: 40
    under the pit, 2 pipes enter the bulkhead wall
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  • #8 16323043
    TomyZ
    Level 8  
    Posts: 12
    Rate: 10
    Today I don't have the opportunity to check it, tomorrow I will test it as you advise.
  • #9 16323275
    bula17
    Level 22  
    Posts: 581
    Help: 52
    Rate: 295
    Check the warm and cold flap actuator motor if it changes position. And the fluid level is not much too little. And as above, the snakes.
  • #10 16324097
    TomyZ
    Level 8  
    Posts: 12
    Rate: 10
    Fortunately, the system seems to have air in it, because I opened the coolant filler cap, it hissed air and ran out of fluid.
    I have added liquid to the tank and the heating works as normal as before.
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Topic summary

LABEL_AI_GENERATED
The user reported a heating issue in their Skoda Fabia I 1.9 SDI, where only cold air was blowing from the vents despite the engine temperature being at 90 degrees. Initial thoughts pointed to a faulty thermostat, but the temperature gauge appeared normal. After replacing the clutch pressure plate, the user wondered if air could have entered the cooling system. Responses suggested checking the air control flap linkage, the heater hoses for temperature, and the warm/cold flap actuator motor. Ultimately, the user discovered that the cooling system had air trapped in it, which was resolved by adding coolant, restoring normal heating functionality.
AI summary based on the discussion. May contain errors.
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