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Thread: D3 Intermittent AC Blower.

  1. 19th December 2022, 05:40 PM #1
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    D3 Intermittent AC Blower.

    The AC blower stops working periodically. It will stop then start again. Seems to be no pattern. No faults recorded. AC nice and cold when blower is working. Ideas?
    MY08 TDV6 D3 Zermatt Silver, B.A.S ECU Remap, ARB Bar, 12K Kingone Winch, 2x100Ah LiFePo4 Auxiliary Power, Safari Snorkel, Baja Rack Roof Rack, Brown Davis Aux. Tank, RWC, Front Runner Rear Ladder, Drifta Drawers, Doran TPMS, LLAMS, GAP IID BT.
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  2. 19th December 2022, 07:01 PM #2
    DiscoJeffster
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    Quote Originally Posted by SeanC View Post
    Ideas?
    I think it’s broken D3 Intermittent AC Blower.

    Looking around online it seems they do fail.
    2010 TDV6 3.0L Discovery 4 HSE
    2007 Audi RS4 (B7)
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  3. 19th December 2022, 09:16 PM #3
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    I replaced fusible link 12 in the engine compartment fuse box. The one with the fan symbol. Wasn’t sure which fan it referred to. The fusible link wasn’t blown but the AC is working again. Time will tell if this was the reason or just a coincidence. Got to love intermittent faults
    MY08 TDV6 D3 Zermatt Silver, B.A.S ECU Remap, ARB Bar, 12K Kingone Winch, 2x100Ah LiFePo4 Auxiliary Power, Safari Snorkel, Baja Rack Roof Rack, Brown Davis Aux. Tank, RWC, Front Runner Rear Ladder, Drifta Drawers, Doran TPMS, LLAMS, GAP IID BT.
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  4. 19th December 2022, 09:19 PM #4
    DiscoJeffster
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    Quote Originally Posted by SeanC View Post
    I replaced fusible link 12 in the engine compartment fuse box. The one with the fan symbol. Wasn’t sure which fan it referred to. The fusible link wasn’t blown but the AC is working again. Time will tell if this was the reason or just a coincidence. Got to love intermittent faults
    A fuse won’t give intermittent behaviour
    2010 TDV6 3.0L Discovery 4 HSE
    2007 Audi RS4 (B7)
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  5. 20th December 2022, 12:05 PM #5
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    Quote Originally Posted by DiscoJeffster View Post
    A fuse won’t give intermittent behaviour
    I thought that it may have had a bad connection. Working again last night. Not this morning then stared up halfway along main beach Moreton Is. Not working again after we stopped.
    MY08 TDV6 D3 Zermatt Silver, B.A.S ECU Remap, ARB Bar, 12K Kingone Winch, 2x100Ah LiFePo4 Auxiliary Power, Safari Snorkel, Baja Rack Roof Rack, Brown Davis Aux. Tank, RWC, Front Runner Rear Ladder, Drifta Drawers, Doran TPMS, LLAMS, GAP IID BT.
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  6. 20th December 2022, 12:30 PM #6
    BradC
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    Among some of the more odd reasons, it could be that the brushes in the blower motor are worn to the point it takes a knock to get it started.

    Do you have a DMM and know how to use it? If it's not working, then the diagnostic becomes dead simple. Follow the electrons and the fault lies where they stop.

    There's not much in the circuit. Blower, speed controller (which is just a transistor used as a variable resistor), relay, fuse and battery.
    MY08 D3 - The Antichrist - "Permagrimace". Turn the key and play the "will it get me home again" lottery.
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  7. 20th December 2022, 06:44 PM #7
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    as brad is alluding to brushes or continuity, a plug or connection, can't be to hard
    Regards
    Daz

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  8. 21st December 2022, 02:03 PM #8
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    I swapped relay 16 with the washer wiper relay. Hasn’t stopped working since.
    MY08 TDV6 D3 Zermatt Silver, B.A.S ECU Remap, ARB Bar, 12K Kingone Winch, 2x100Ah LiFePo4 Auxiliary Power, Safari Snorkel, Baja Rack Roof Rack, Brown Davis Aux. Tank, RWC, Front Runner Rear Ladder, Drifta Drawers, Doran TPMS, LLAMS, GAP IID BT.
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  9. 29th December 2022, 12:09 PM #9
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    The ac continues to work. So it appeared to be a “sticking” relay.
    I like cheap fixes.
    MY08 TDV6 D3 Zermatt Silver, B.A.S ECU Remap, ARB Bar, 12K Kingone Winch, 2x100Ah LiFePo4 Auxiliary Power, Safari Snorkel, Baja Rack Roof Rack, Brown Davis Aux. Tank, RWC, Front Runner Rear Ladder, Drifta Drawers, Doran TPMS, LLAMS, GAP IID BT.
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