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Thread: Legacy Heater problems

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    Unhappy Legacy Heater problems

    Guys/Gals

    I have a 2010 legacy Estate .

    Have problem in that the heater has stopped working on passenger side .

    No matter how high heater is set there is only heat coming out on drivers side non on passenger .

    Doesn't matter if dual heat turned on or off .

    Been told it is probably a big job involving removing dash to get in to actual matrix .

    Has anyone had similar issues and if so did you get it sorted and how.
    Would a heater flush work ?

    I am not certain if it is matrix or some of the actuators ?

    Thoughts folks ??

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    Folks

    Anyone got any suggestions about my question ?



    Quote Originally Posted by Geds View Post
    Guys/Gals

    I have a 2010 legacy Estate .

    Have problem in that the heater has stopped working on passenger side .

    No matter how high heater is set there is only heat coming out on drivers side non on passenger .

    Doesn't matter if dual heat turned on or off .

    Been told it is probably a big job involving removing dash to get in to actual matrix .

    Has anyone had similar issues and if so did you get it sorted and how.
    Would a heater flush work ?

    I am not certain if it is matrix or some of the actuators ?

    Thoughts folks ??

  3. #3
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    Try back flush the heater coil. disconnect both lines and using a garden hose and very hot water, flush the coil - do it in both directions and about a dozen times - sometimes crud can clog the passenger side of the coil.

    There’s also an actuator for the passenger side mix which can act up
    Last edited by Fozzy; 11-03-2018 at 21:23.

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    As Far as I know the matrix is a single unit so if it's working on the drivers side it's not opening up on the passengers side . Is there any Air at all blowing out or just cold air
    colin, richard, bertie, frank, gone but not forgotten.

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    Just cold out of passenger , hot from drivers side but even that is not roasting

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    Full ISDC Club Member seanie's Avatar
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    it is the heater flap control motor on passenger side is your problem
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    Going to try the flushing to see if that works .

    If not is getting at the acctuator a pain?

    Any links to show where and how ??

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    Quote Originally Posted by seanie View Post
    it is the heater flap control motor on passenger side is your problem
    Seanie,

    I don't know yet . Any tips on how I would check

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    looks something like this, have not replaced on subaru but have on countless other breeds.
    remove or fold down glovebox and look at side of centre console behind radio and heater controls should be there, disconnect motor and see if you get heat when manually activated, should diagnose your problem
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    Think I will try the flush first sometime over next few weeks .

    If that doesn't help them go looking at the other suggestions .

    Would be handy if Haynes or someone did a manual for it .

    I haven't been able to find one .
    Does such a manual exist ?

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    Quote Originally Posted by Geds View Post
    Going to try the flushing to see if that works .

    If not is getting at the acctuator a pain?

    Any links to show where and how ??
    if it is a single heater matrix ( not sure) i'd imagine there should be same temp both sides if blocked or not

    usually handy to get at just take out your glovebox, be easier check that first than flush the heater matrix

    i'm assuming you have dual control heaters for left and right side?
    Last edited by seanie; 13-03-2018 at 00:21.
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    scoobysub (13-03-2018)

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    Chances of the heater being blocked are slim I’d be checking the actuator first
    colin, richard, bertie, frank, gone but not forgotten.

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    Im 99% each side is elec motor controlled.

    So a motor may be failed

    Sent from my SM-N910T using Tapatalk

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    Thanks folks .

    Guess I will te think so and double check acctuator / motor first .

    Going to be a week or so before I get shed time etc .

    Seanie
    Thanks for photo that helps .

    Does anyone do s manual for these . Something like the Haynes type manual ?

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