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Thread: Heater issues - Dual climate control

  1. #1
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    Heater issues - Dual climate control

    Hi all,

    First post, i'm sure you'll all be able to help and have some ideas.

    My GTD has dual climate control and the passenger side is working fine but the drivers sider is noticeably cooler than the passenger side. VW have the car and have reported that the temp sensor on the drivers side is not going above 21.8*C when the temp setting is put to high but the passenger side is. The tubes leading to the matrix in the passenger footwell are both hot.

    They are now quoting that they would need over £1k to strip the dash to do further investigation without actually knowing what the issue could be!!! quoting it could be the matrix with one of the flaps not working or the control unit not working.

    Would a coolant flush help do you think?

    thanks

  2. #2
    Administrator Keithuk's Avatar
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    First posts normally go in introductions else you could get a free fix and we never see you again!!!

    The Mk7 Golf heater matrix does give a problem, that's bee talked about on here if you search. When was the pollen filter last changed?

    You need to get your motor scanned (preferably with VAG-COM\VCDS) for any error codes logged in the ecu and post them, that will save a lot of guessing and check systems out.
    2010 Golf GTD (170) CBBB, 5 Door, Shadow Blue (P6/D5Q), Transmission Code: KXZ, Flat Tyre Indicator, Basic Protection Pack + VCDS.


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    Iíve read other theads, luckily my friend develops VW engines so I didnít have to pay for a the VAG diagnostics which saved a bit 😊, gave VW the report and they were still stumped.

    Below is a snapshot of the report with the info but they said they would be guessing as to what it was!

    01-Engine -- Status: OK 0000
    03-ABS Brakes -- Status: OK 0000
    08-Auto HVAC -- Status: Malfunction 0010
    09-Cent. Elect. -- Status: Malfunction 0010
    10-Park/Steer Assist -- Status: OK 0000
    13-Auto Dist. Reg -- Status: OK 0000
    15-Airbags -- Status: OK 0000
    16-Steering wheel -- Status: OK 0000
    17-Instruments -- Status: OK 0000
    19-CAN Gateway -- Status: OK 0000
    42-Door Elect, Driver -- Status: OK 0000
    44-Steering Assist -- Status: OK 0000
    52-Door Elect, Pass. -- Status: OK 0000
    55-Headlight Range -- Status: OK 0000
    5F-Information Electr. -- Status: OK 0000
    A9-Struct. Borne Sound -- Status: OK 0000

    2 Faults Found:
    1048834 - Functional Limitation due to Energy Management
    B10CD 00 [009] - -
    [New feature! Extended UDS fault detail is only supported by current gen. interfaces]
    Confirmed - Tested Since Memory Clear
    Freeze Frame:
    Fault Status: 00000001
    Fault Priority: 7
    Fault Frequency: 13
    Reset counter: 170
    Mileage: 95048 km
    Date: 2019.01.09
    Time: 18:03:17

    Voltage terminal 30: 11.6 V
    Auxiliary heater: in stages-Enabling for auxiliary heater operation: No enabling
    Auxiliary heater: in stages-Act.val.: 1
    Auxiliary heater: in stages-Specified value: 3
    Auxiliary heater: in stages-Specified value for control: 3

    1048835 - Functionality limited due to Engine Control Module
    P1719 00 [008] - -
    [New feature! Extended UDS fault detail is only supported by current gen. interfaces]
    Intermittent - Confirmed - Tested Since Memory Clear
    Freeze Frame:
    Fault Status: 00000001
    Fault Priority: 6
    Fault Frequency: 133
    Reset counter: 210
    Mileage: 91779 km
    Date: 2018.10.29
    Time: 06:18:24

    Voltage terminal 30: 14.1 V
    Auxiliary heater: in stages-Enabling for auxiliary heater operation: Enabling stage 3
    Auxiliary heater: in stages-Act.val.: 1
    Auxiliary heater: in stages-Specified value: 3
    Auxiliary heater: in stages-Specified value for control: 3

  4. #4
    Administrator Keithuk's Avatar
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    Your showing 2 error codes I don't have a solution for and neither does Google.

    1048834 - Functional Limitation due to Energy Management
    B10CD

    1048835 - Functionality limited due to Engine Control Module
    P1719
    2010 Golf GTD (170) CBBB, 5 Door, Shadow Blue (P6/D5Q), Transmission Code: KXZ, Flat Tyre Indicator, Basic Protection Pack + VCDS.


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    Hi, did you figure out this problem? I have a 2015 Caddy that have a problem with the heating controll that is very similar to what you are describing here. Wold be nice to know what you figure out.

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    Administrator Keithuk's Avatar
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    Quote Originally Posted by Kavset View Post
    Hi, did you figure out this problem? I have a 2015 Caddy that have a problem with the heating controll that is very similar to what you are describing here. Wold be nice to know what you figure out.
    First posts normally go in introductions else you could get a free fix and we never see you again!!!

    Your car spec says 0, only what I've added from this post 2015 Caddy minus engine size/type.
    2010 Golf GTD (170) CBBB, 5 Door, Shadow Blue (P6/D5Q), Transmission Code: KXZ, Flat Tyre Indicator, Basic Protection Pack + VCDS.


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    Quote Originally Posted by Pinni88 View Post
    Hi all,

    First post, i'm sure you'll all be able to help and have some ideas.

    My GTD has dual climate control and the passenger side is working fine but the drivers sider is noticeably cooler than the passenger side. VW have the car and have reported that the temp sensor on the drivers side is not going above 21.8*C when the temp setting is put to high but the passenger side is. The tubes leading to the matrix in the passenger footwell are both hot.

    They are now quoting that they would need over £1k to strip the dash to do further investigation without actually knowing what the issue could be!!! quoting it could be the matrix with one of the flaps not working or the control unit not working.

    Would a coolant flush help do you think?

    thanks


    How are you getting on with this? I have the exact same issue. Dual climate control. Driver side is always cold no matter what temp itís set to. Passenger side seems to be working as it should, and gets hot on demand.

    The temp sensor-

    I checked the resistance on my driver side thermistor and the resistance adjusts quickly and reacts to heat gun as it should.

    I donít have access to VAG/VCDS so could not read live temp figures.

    Although not ideal, I used another code reader to check if any fault codes were stored but nothing is stored.

    You could easily rule out the thermistor by swapping it from the one on the left side. I donít believe they are side specific. I havenít done this myself but may do today to 100% rule out the thermistor. You could do this and see if heat comes out from the driver side after the swap.

    I need to sort this issue ASAP, itís getting colder day by day and the driver side puts on no heat at all.

    Will also try to flush it out today also from the bulkhead- I know this is not a permanent fix or fix at all specifically, however I have heard many owners do this and have some success with the heating working again for a few weeks or for some time. If it does, itíll confirm the matrix as the issue and also give some heating for meantime.

    What a horrible issue.
    Last edited by Momomo; Yesterday at 15:53.

  8. #8
    Administrator Crasher's Avatar
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    This is becoming a perennial Golf 7 problem, the heater matrix is tiny and the thin tubes get blocked plus the output from the right vent is always lower than the left due to the daft design of the ducting. You cannot successfully flush the matrix out BUT the system MUST be flushed before fitting a new one which thankfully is a lot easier than it used to be. To improve the heat output from the right vent you have to remove the entire dash and lag the integrated mouled in ducting behind and this makes a big difference.
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  9. #9
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    Quote Originally Posted by Crasher View Post
    This is becoming a perennial Golf 7 problem, the heater matrix is tiny and the thin tubes get blocked plus the output from the right vent is always lower than the left due to the daft design of the ducting. You cannot successfully flush the matrix out BUT the system MUST be flushed before fitting a new one which thankfully is a lot easier than it used to be. To improve the heat output from the right vent you have to remove the entire dash and lag the integrated mouled in ducting behind and this makes a big difference.
    Have read most of your posts on this issue already, on multiple sites. Thanks for your advice.

    Where are you based Crasher?

    I think dash out to improve the heat on the right side would be too much of an expense. I would be happy with the normal Ďweak by designí heat as it was always enough before.

    How long would a flushing and matrix replacement take, at competent specialist?

    I keep hearing people who have had it fully flushed and replaced as per your post but the issue still comes back even if the silica bag was no longer left in after the flush. Is this true - which would point to a inherent design issue.
    Last edited by Momomo; Yesterday at 17:48.

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    Does anyone have any recommendations for a reputable VW specialist near the Guildford area. Am happy to travel a bit if the specialist is a member on here and highly regarded.

    Crasher I respect your experience and advice.

    I am trying to get my head around this issue and spoke to the owner of a VW specialist today who says if Iím getting heat from passenger side and only cold on driver, it will not be a matrix issue and it will be something else.

    Ofcourse it needs to be booked in for confirmation of issue.
    Last edited by Momomo; Yesterday at 18:15.

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