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Thread: Heater stops working and so does engine temp...

  
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    Heater stops working and so does engine temp...

    Came home from holiday on friday and on the way back from the airport suddenly the heater stopped working, at this time i also noticed the engine temp had dropped to the minimum. After about 10 mins i seen the engine temp come up and as soon as it did heat came from the heater again.

    Its done it again today and after switching the car off and on again the engine temp came up and so did the heat from the heater.

    Any ideas ?

    Cheers

    Matt

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    James Watt's Avatar
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    Hi Matt.
    Unless I'm mistaken, I had the same situation with a previous car.

    The coolant level was too low, due to a defective head gasket leaking it.

    Have you checked your coolant level?

    Regards James watt
    Standard 2002 1.6 16V Astra MkIV 'G'

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    I had this, and it took the engine absolutely bloody ages to warm up with the heaters.

    The thermostat was faulty.

    Vaux want £36 for a new one, but a garage that I use supplied and fitted one for £45 and it solved my problem

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    Hopefully Matt will find out what the problem is/was and let us know?
    Standard 2002 1.6 16V Astra MkIV 'G'

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    i had the same problem with my astra mk4 i got the heater motor changed coz apparently it was worn out i got a new 1 and everytihnk was fine and the temp was bak 2 normall

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    sorry if you think im hijacking. Would the engine temperature gauge reach a certain level then drop back down again if the thermostat was knackered? ALso, would this cause the heaters to blow nothing out of them?
    A Student on a Budget

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    Hi Shug.
    Not had a defective thermostat myself, but did have a cold breeze from what should have been a hot one. The coolant level was too low.

    Try (carefully) touching the radiator on the side at different heights and see if the temperature is constant. If it gets cooler at higher levels, then suspect the coolant level.

    After topping mine up, I had to get rid of an air lock.
    Eventually the head gasket failed catastrophically and required replacement.

    Hopefully you'll have a less costly solution?

    Regards
    James Watt
    Standard 2002 1.6 16V Astra MkIV 'G'

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    Quote Originally Posted by Stevie1556 View Post
    I had this, and it took the engine absolutely bloody ages to warm up with the heaters.

    The thermostat was faulty.

    Vaux want £36 for a new one, but a garage that I use supplied and fitted one for £45 and it solved my problem
    ive had this on a mk3 astra and thier known for sticky thermos. Luckily it was only stuck open. Never known it to occure on mk4's ill have to keep that in mind.
    Former Astra: Mk3 1.4 K reg
    Current Astra: Mk4 1.4 V reg LS (The Half-Arsed Astra )

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    Thanks for the replys guys, the coolant level was low so that has cured it. Only problem now is coolant level is dropping again and i cant see any leaks so im guessing its my head gasket ????

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    Hi again Matt.
    Check the exhaust emission and see how much water vapour it produces (when the engine is running at normal temperature).

    My one produced a nice one, a bit like the one you get when a kettle is boiling the water, and you get the visible vapor (steam is invisible)

    Another thing to check is to remove the oil filler cap and see if you have a browny yellow froth (often called mayonnaise) on the metalwork.

    If you have, that will mean your coolant is getting there as well.

    An expensive job at a Vaux' repair shop, less if you can get it done at "mates rates".

    Keep us posted.

    Regards James Watt
    Standard 2002 1.6 16V Astra MkIV 'G'

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