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Thread: Heater Resistor

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    Default Heater Resistor

    Does the heater resistor control the heat settings?

    My temp dial is on full but the air is only ever luke warm??

    Would changing the Resistor help? I have already changed the controls because the blower speed settings didnt work, that is now working.

    Any help grateful.

  2. #2
    Regular Member r.bailey63's Avatar
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    Default

    Resistor is just for the motor speed

    whats your coolant level like?

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    Coolant level was low, because it was under warranty I took it back and they put some form of rad-x in the coolant the 'plug' the problem which i wasnt best impressed about, the garage is a rip you off kinda place. could this be causing the problem?

  4. #4
    Full Member Robsey's Avatar
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    Vehicle : Vectra C

    Trim : Energy

    Engine : Z19DTH

    Year : 2005

    Mileage : 131,000

    Default

    It is most likely your coolant level is too low in the reservoir, check and remedy any leaks.

    or your thermostat has gone open circuit, and thus the water is not getting very warm very quickly...typical temp gauge reading if thermostat has gone is about 80 to 85 degrees max.
    Healthy stat will be about 90 -98 degrees max.

    Another possibility is, if your car is an earlier model, then the heater matrix may be clogged, and will possibly need a reverse flush to clear it.

    Also ensure a good mixture ratio of coolant and water is used when refilling / topping up.

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    Coolant level was low, now stable after rad-x!

    The temp guage does not work or the thermostat is not working?

    Its a 52 plate so matrix could be blocked.

    Any possible leak locations on the coolant?

  6. #6
    Full Member Robsey's Avatar
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    Vehicle : Vectra C

    Trim : Energy

    Engine : Z19DTH

    Year : 2005

    Mileage : 131,000

    Default

    Leak locations,
    All connections to be honest.
    Check all hoses for splits etc.

    Is the engine reasonably quiet?...noisey water pump could be a source of leakage, however these usually start to leak long before they start to make a rattle / knocking noise.

    Best way to find the leak in the engine bay, is to look for a coloured powdery residue around pipes etc...
    The colour of the residue will match that of your coolant.
    I use the luminescent orange / red long life coolant....tends to dry as a pink residue.
    Bluecol etc will dry with a blue or green residue.

    Most important, check your front interior carpets...if these are damp, then your matrix could be the source of your leak...
    In that case, only a new matrix will fix this.

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    A new matrix sounds expensive!!!

    The water pump...... what kind of noise would you expect? te car has started to make a noise when the car is moving 30 or above, but if I drop the clutch the noise remains. Its kind of a low pitch whining noise almost like big chunky tyres on a concrete surface.

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    Full Member Robsey's Avatar
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    Vehicle : Vectra C

    Trim : Energy

    Engine : Z19DTH

    Year : 2005

    Mileage : 131,000

    Default

    Only worry about the matrix if you have wet carpets...but wet carpets can also be caused by a blocked scuttle panel where the pollen filter sits.

    If the tone of the low pitched drone/ whine varies with engine speed, then the water pump should be checked out.
    You should find water dribbling from the bottom of the cambelt cover onto the driver's side front wishbone...or somewhere nearby.

    Other than this, it is a matter at looking at your header tank and cap, radiator, thermostat housing, the engine temperature sensor and any water hoses that you can see. Remember the tell tale is coloured residue.

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    Default

    Thanks for the advice I'll get investigating

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    Default

    I've had the thermostat and housing replaced, all is warm again. Thanks for the help guys.

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