No heating, Fan keeps coming on!!!

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Thread: No heating, Fan keeps coming on!!!

  1. #1

    Join Date
    20-06-2015
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    No heating, Fan keeps coming on!!!

    Recently my heating has become a bit unreliable some days its works others it doesn't, along with this my engine fan comes on a lot more than normal even on short trips. Fluid levels are all normal as I check them weekly.
    Any ideas??
    Last edited by BillyBoy; 17-02-2016 at 13:18.

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  3. #2
    Check the resistor?


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  4. #3

    Join Date
    20-06-2015
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    Has recently been replaced with Genuine Bosh resistor!

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  6. #4

    Join Date
    24-02-2015
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    sounds like you have a air lock in the heater matrix.
    have you changed the coolent lately?

    Try changing the radiator sensor part number is 55591002 cheep as chips on eBay

  7. #5

    Join Date
    20-06-2015
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    Yes the coolant has been changed recently, whats the best way to get rid of the air lock??

    If the sensor was faulty would it show on the EML??

  8. #6

    Join Date
    21-11-2013
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    Yeah EML light would be on

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  9. #7

    Join Date
    20-06-2015
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    I have gone into the hidden menu to check the engine temperature and it keeps fluctuating from 90 up to over 100 and the fan kicks in and goes back down to the lower end of the scale, it never seems to settle at a steady temp, would this be a faulty Coolant Sensor??

  10. #8

    Join Date
    30-08-2015
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    if your sitting idle then the temp gauge will go up and down all the time as the cars not traveling so the wind isnt cooling down the radiator.

    take the top of the coolant bottle and sit with the revs at 2k revs for about 10 min watching the bottle if you can and you will see it erupt like a volcano lol theres your airlock

  11. #9

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    20-06-2015
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    The temp varies while i'm driving which is my concern even at a steady constant speed!!

    Is that the best way to get rid of the airlock then??

  12. #10

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    Its probably not the best but easiest lol only other option is draining your coolant and taking the pipes apart

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  13. #11

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    20-06-2015
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    So I basically from cold start, Coolant cap off, keep the car at around 2k revs until the coolant starts bubbling over (like a volcano!) then turn the engine off?

  14. #12

    Join Date
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    its what i done. and put the heaters on full that way you will start to get heat from the heater and not cold air all the time

  15. #13

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    Just remember to top up your coolant afterwards Click here to enlarge lol

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  16. #14

    Join Date
    20-06-2015
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    Will it give it a go tomorrow then, Cheers guys!!

  17. #15

    Join Date
    20-06-2015
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    Give it a go this morning after the car got up to temp and the fan kicked in the coolant bubbled and then dropped, i let it idle for a little longer then squeezed the pipe that runs across the top of the radiator back to the coolant tank and it bubbled some more.

    problem solved do you think??

  18. #16

    Join Date
    30-08-2015
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    if the fans are blowing hot air out of them then im sure its all gone but keep an eye on it overheating again as if it does it means theres still air in it somewhere

  19. #17

    Join Date
    20-06-2015
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    Ok cool, if its still the same do you think its worth repeating the process??

  20. #18

    Join Date
    20-06-2015
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    Update!!!

    Since doing the above and going out for a drive no heat through the vents and the engine fan was coming on every other mile, so if anything its worse!!

    Corsa = Endless Trouble
    Last edited by BillyBoy; 20-02-2016 at 14:36.

  21. #19

    Join Date
    06-06-2017
    Posts
    291
    Click here to enlarge Originally Posted by BillyBoy Click here to enlarge
    Update!!!

    Since doing the above and going out for a drive no heat through the vents and the engine fan was coming on every other mile, so if anything its worse!!

    Corsa = Endless Trouble
    Hey Billy boy. Did you ever figure out the problem?

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