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Thread: A/C and Auto recirculate won't activate on IHKA

  1. #1
    Join Date
    Nov 2016
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    Angry A/C and Auto recirculate won't activate on IHKA

    Hi everyone! Well I'm sad to say that I need some extra help with a minor issue. Seemingly all at the same time, the following things happened:
    - the OBC screen brightness was locked at full brightness
    - the A/C won't light up when pressed
    - the circulation button skips over "auto circulation" when pressed

    Anddd that's all I've discovered. So I went home and recoded the cluster and that fixed the auto-brightness, so just a small hiccup. I tried cleared the codes on the A/C in PA-Soft but the codes remained. I had the following codes:

    16[022] Additional heater, Rear Windshield defogger
    1B[027] Communication with the Additional Heater

    The 1B[027] went from present to not currently present on clear, but won't go away. I then tried my defrosters and both showed activation on the IHKA. This is feeling like a massive electrical bug. Tomorrow I will try disconnecting and reconnecting the battery. I should have recoded the IHKA like I did the cluster, but didn't think of it. Aside from that, I'm a little stumped on other trouble shooting I could do.

    I also have BlueBus, but I suspect this issue is unrelated. I mention this because BlueBus causes my IHKA to periodically reset when sitting at a light or cruising at high speed (IE: reboots and returns to whatever settings the car turned on with.)
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    BMWCCA GGC: 530872
    "You canít connect the dots looking forward; you can only connect them looking backwards." - Steve Jobs

  2. #2
    Quote Originally Posted by YoitsTmac View Post
    I also have BlueBus, but I suspect this issue is unrelated. I mention this because BlueBus causes my IHKA to periodically reset when sitting at a light or cruising at high speed (IE: reboots and returns to whatever settings the car turned on with.)
    Have you sent Ted an email regarding this?

  3. #3
    Join Date
    Nov 2016
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    I did a long time ago. He said he found a car that had the same issue and I believe he said he solved the issue for most IHKA's. This still happens to me.

    bump on the main issue. I unplugged the battery and tried to reset the IHKA, both with no luck. I'm beginning to suspect internal fault
    | My YouTube Channel | Instagram|

    BMWCCA GGC: 530872
    "You canít connect the dots looking forward; you can only connect them looking backwards." - Steve Jobs

  4. #4
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    bump. At a loss for troubleshooting from here
    | My YouTube Channel | Instagram|

    BMWCCA GGC: 530872
    "You canít connect the dots looking forward; you can only connect them looking backwards." - Steve Jobs

  5. #5
    Join Date
    Jan 2014
    Location
    OC, CA
    Posts
    250
    Is it possible that the temperature control until failed? I've read that the fan inlet can get clogged with debris and the unit overheats. Maybe obtain replacement from a local pull a part to test.


    2004 BMW 330CI ZHP, Silver Grey Metallic, Dinan: Stage 2 Software, High Flow Intake,
    Free Flow Exhaust, Front Strut Bar, Stage 2 Suspension System, Staggered Hartge Replica Wheels,
    M3 Mirrors (Side and Interior), M3 Seats

  6. #6
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    Quote Originally Posted by PdZHP View Post
    Is it possible that the temperature control until failed? I've read that the fan inlet can get clogged with debris and the unit overheats. Maybe obtain replacement from a local pull a part to test.
    Thanks for this. I never knew about the overheating. I ordered a facelift unit for $30 to my door. For the time, gas and effort of pulling a unit, just seemed to make sense. Thanks! I will keep everyone posted!
    | My YouTube Channel | Instagram|

    BMWCCA GGC: 530872
    "You canít connect the dots looking forward; you can only connect them looking backwards." - Steve Jobs

  7. #7
    Join Date
    Nov 2016
    Location
    Main County
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    Could this be caused by a failing FSR? I already bought a new IHKA, but just remembered I've been actively putting off my FSR
    | My YouTube Channel | Instagram|

    BMWCCA GGC: 530872
    "You canít connect the dots looking forward; you can only connect them looking backwards." - Steve Jobs

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