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  1. #1
    DF Probation macmilm's Avatar
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    Help Does this sound like thermostat ????

    Car running fine and had lots of nice warm air inside car until yesterday.....
    Suddenly I get no warm air inside car at all and the temp gauge seems to now be going a little higher than normal and unless I am mistaken rises quicker than before from cold.

    Would suggest to me thermostat stuck shut ?!?!?! Have read elsewhere potentially a valve thing these models have also possibility (aircon related) ??

    Any tips appreciated.

    Petrol Zafira if it makes a difference.

    Cheers

  2. #2
    DF VIP Member Zippeyrude's Avatar
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    Default Re: Does this sound like thermostat ????

    sounds like a possible blockage in the pipe between the engine and the heater matrix.

    Thanks to Zippeyrude

    macmilm (6th February 2014)  


  3. #3
    DF Probation macmilm's Avatar
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    Default Re: Does this sound like thermostat ????

    Would a blockage happen that suddenly ????? It was nice n hot day before !
    Apparently there is a valve which when u turn on aircon it alters flow of water and apparently these are coming to pack up
    I did accidentaly turn on air con day before (which I assume diverts coolant) turned it off but maybe valve stuck e.t.c

    Just guessing

  4. #4
    DF VIP Member riget's Avatar
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    Default Re: Does this sound like thermostat ????

    Not thermostat, have you checked water level?

  5. #5
    DF Probation macmilm's Avatar
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    Default Re: Does this sound like thermostat ????

    Quote Originally Posted by riget View Post
    Not thermostat, have you checked water level?
    Yes..... seems fine.

    Would I be best feeling pipes when it is warm to determine where hot stops and cold starts ????
    Also I dont know if it is just me but when temp is up it appears the temp gauge needle can move up and down fairly quickly (only by 5 degrees or so)

  6. #6
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    Default Re: Does this sound like thermostat ????

    Not 100% sure but I believe the Zafira has a heater control valve. It is a water valve that adjusts the water flow through the heater matrix. What normally happens is that the control cable running from the dashboard hot/cold lever to the valve becomes detached on one end - usually the valve end. Look under the bonnet around the area where the heater pipes enter through the bulkhead. A closed valve with no water going through the heater would mean the engine temp rising more quickly. Does the hot cold control have less resistance than normal. If yes then it may have come loose on the lever, if no or not much then the cable has come loose on the valve. (">

    Thanks to BigBird

    macmilm (6th February 2014)  


  7. #7
    DF VIP Member Zippeyrude's Avatar
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    Default Re: Does this sound like thermostat ????

    see if you can feel the hoses that go to the heater matrix. there should be a flow and return.

    if one of these is not hot then there is the problem.

    work your way back to find the valve or blockage. it is perfectly possible that the blockage is a sticky valve.

    Thanks to Zippeyrude

    macmilm (6th February 2014)  


  8. #8
    DF Probation macmilm's Avatar
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    Default Re: Does this sound like thermostat ????

    Thanks all.... The Hot/Cold knob does feel a little too easy to turn now you mention it will have a look in the daylight tomorrow

  9. #9
    DF VIP Member riget's Avatar
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    Default Re: Does this sound like thermostat ????

    Quote Originally Posted by macmilm View Post
    Yes..... seems fine.

    Would I be best feeling pipes when it is warm to determine where hot stops and cold starts ????
    Also I dont know if it is just me but when temp is up it appears the temp gauge needle can move up and down fairly quickly (only by 5 degrees or so)
    Sounds like the valve then

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