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General Chat Thread, why is my car heater not working?? in General; not sure if anyone will know the answer but my car heater has stopped working, and in this weather, its ...
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    Admiral208's Avatar
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    why is my car heater not working??

    not sure if anyone will know the answer but my car heater has stopped working, and in this weather, its a bit annoying. Does anyone have an idea why its not working?

    Symptoms:
    - it used to work until about 2 months ago.
    - if im driving along normally, the engine temperature gauge doesn't move and stays at 0 (cold)
    - If I leave the car running, but stationery, the engine temperature gauge will move to normal operating temp and the heater works.
    - If I then drive away, the gauge slowly moves back to cold and so does the heater.

    I have a good idea what I think it is but don't want to say I case i influence anyone in a Derren Brown sort of subliminal messaging type way.

    What is the problem. Anyone?

    James

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    Chris_in_notts's Avatar
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    thermostat is knackered

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    Admiral208 (3rd December 2010)

  4. #3

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    Yeah i agree with Chris, sounds like your thermostat is
    Last edited by vikpaw; 15th December 2010 at 09:52 AM. Reason: LANGUAGE

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    Admiral208 (3rd December 2010)

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    Admiral208's Avatar
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    interesting. That was what i thought. now my problem is that to replace my thermostat, which cost me about £10 to buy, I have to remove air filter, cam belt, timing belt, lots of different covers. PITA!!

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    Chris_in_notts's Avatar
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    what car is it?

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    Admiral208's Avatar
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    Mk3 Astra

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    Chris_in_notts's Avatar
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    seems strange having to remove the timing belt to replace the stat normally a case of removing the housing normally located near one of the large radiator hoses changing the stats over and topping up the water, if you have to drop the timing belt off you may aswell replace that at the same time.

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    Admiral208's Avatar
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    yeah. Thats what I thought. When it stopped working, I went and bought a replacement, then got the haynes manual out. Wrong way round! its an absolute ball ache. the stat is located just behind the timing belt cover. Im not particularly confident with car repairs. Do you know if this is an easy (ish) job? Any tips?

  11. #9
    Chris_in_notts's Avatar
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    just done abit of research yes you will need to remove all covers and remove belts and the power steering pump! jesus lol if you can swing spanners it shouldn't be to hard except making sure the timing marks are in line when putting the belt back people would suggest locking them but id just mark them with tippex before you start and make sure they are in line before you start it up.

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    Admiral208's Avatar
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    thanks mate. where did you look to find that out?

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    Chris_in_notts's Avatar
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    just did a quick google search didnt find any how2's just someone asking the same question

    Astra 8V Thermostat

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    Admiral208's Avatar
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    Ok. Do you think this would be expensive if i took it to the garage?

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    Sirbendy's Avatar
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    Relax!

    As a MK3 and MK4 owner, both with this bloody silly design, you've got an answer.

    Requires:

    RENAULT 4, 5, 9, 11, 18, 19, 21, 25 - THERMOSTAT on eBay (end time 19-Dec-10 13:43:14 GMT)

    1 of. And 2 hose clips, pennies from a motor factors.

    Simply let the engine cool down, unfasten the clip that hold your top radiator hose to the water pump outlet. Disconnect the hose. It's a git if it's not been moved in a while. Pull, swear, it'll come off.

    Once it's off, pop the thermostat above in the hose, keeping it as straight as possible. You want the sticking out bit to point towards the engine/pump, as this is the wax pellet that senses the temperature.

    Push both clips over the hose, push it firmly back onto the pump outlet. Fasten up one clip to hold that hose in the pump. Clip #2 - feel the pipe to locate the flat surface of the 'stat, and put the clip round there to hold the stat tightly in the hose.

    Kick it in the guts, let it warm up and top up your coolant, job done.

    The person who designed the X/C/Z series 8 valvers needs a gun to the head for the design...

    Mine runs at 85-92 all day long now.

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    Sirbendy's Avatar
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    Quote Originally Posted by Admiral208 View Post
    Ok. Do you think this would be expensive if i took it to the garage?
    Gods, don't bother...they'll look at you funny for a start. To get the "normal" stat replaced involves covers off, timing belt off etc. It would cost a bit, yes.

    Trust me. The solution I've posted (and done twice) takes no longer than 30 minutes and is as easy as wiring a plug...

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    Admiral208 (3rd December 2010)

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    That's not a bad idea. Obviously yout stat is stuck open so a solution is to put another stat in elswhere, between the engine and the inlet to the radiator (by the sounds you've been advised here to put it in the top hose which is fine).
    Of course if it were stuck shut you'd be rather screwed with that design! That's rubbish. I'm used to working on mini's. 3 bolts on the cylinder head (or nuts on studs) and it whips right out!



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