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Thread: Facelift Blower Fan Resistor/Regulator Replacement

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    Facelift Blower Fan Resistor/Regulator Replacement

    I have removed my Hella fan (installed last year) so that I might replace the Regulator. Should I decide to use the existing hunk of aluminum alloy and just screw the new setup into it, will I need to apply fresh heat sink paste?

    Second question I have is how does one actually remove the lower section so that I can easily remove existing aluminum alloy heat dissipation unit and use the one that came with the resistor/regulator?
    1994 E500
    249/275 - 8F19 or 8F32 or 8320

    1991 560 SEC
    199/268
    2014 E350 Cab 799/264

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    Re: Facelift Blower Fan Resistor/Regulator Replacement

    Has nobody replaced a regulator on a facelift HVAC system?
    1994 E500
    249/275 - 8F19 or 8F32 or 8320

    1991 560 SEC
    199/268
    2014 E350 Cab 799/264

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    Re: Facelift Blower Fan Resistor/Regulator Replacement

    Quote Originally Posted by nocfn View Post
    I have removed my Hella fan (installed last year) so that I might replace the Regulator. Should I decide to use the existing hunk of aluminum alloy and just screw the new setup into it, will I need to apply fresh heat sink paste?
    The one time I did this, many years ago, I removed the regulator from the heat sink and left the existing heat sink in place. This was easy (and not possible with the older design on 86-93 models). A dab of fresh heat sink paste would be a good idea, and would be required if the old paste is either missing or dried out / crumbling.



    Quote Originally Posted by nocfn View Post
    Second question I have is how does one actually remove the lower section so that I can easily remove existing aluminum alloy heat dissipation unit and use the one that came with the resistor/regulator?
    I'm not sure - can't recall if I've ever done this on a 94-95. Should be 3 screws on top holding it in place.

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    Facelift Blower Fan Resistor/Regulator Replacement

    That is a fine public service response, as time goes by it will be a good reference. Thank you!
    1994 E500
    249/275 - 8F19 or 8F32 or 8320

    1991 560 SEC
    199/268
    2014 E350 Cab 799/264

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    Facelift Blower Fan Resistor/Regulator Replacement

    I did it on a certain white 1995 station wagon about 2010, but unfortunately didn't photographically document the process. It's not a horrible job.

    Just be sure not to lose any of the small metal clips down I to the abyss when cracking apart the blower motor box. IIRC the new regulator came with a new heat sink. It was a bolt- and plug-in thing. I did the fan and the regulator at the same time -- that way avoiding having to re-open the box to replace the other component.

    Also, use the opportunity on late cars to replace the cabin air filters.

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    Re: Facelift Blower Fan Resistor/Regulator Replacement

    Got my filters and regulator on the way, just can't seem to free the hunk of aluminum out from under the support. Thought about a gentle vacuum of the innards of the evaporator area while I am there so that is a side goal too, access to evaporator.
    1994 E500
    249/275 - 8F19 or 8F32 or 8320

    1991 560 SEC
    199/268
    2014 E350 Cab 799/264

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    Re: Facelift Blower Fan Resistor/Regulator Replacement

    Yep, no better time to get a shop vac down that side of the evaporator.

    Actually, you should order a new evaporator and replace it as preventative maintenance.




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    Re: Facelift Blower Fan Resistor/Regulator Replacement

    No on evap prevent but tell me how that little heat sync comes out and the access to the evaporator, I can clean a bit out for sure.
    1994 E500
    249/275 - 8F19 or 8F32 or 8320

    1991 560 SEC
    199/268
    2014 E350 Cab 799/264

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    Re: Facelift Blower Fan Resistor/Regulator Replacement

    Louis, any update? Can you post some photos of the project on this thread for future reference?


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    Facelift Blower Fan Resistor/Regulator Replacement

    Quote Originally Posted by gsxr View Post
    Louis, any update? Can you post some photos of the project on this thread for future reference?

    Yes I finished the job with a lifetime replacement FCP Euro KAE, German made resistor. Identical to OEM with subtle differences: leads are shorter making needle nose pliers useful in attachment to blower motor. Also, the resistor is glued to heat sink, so less t20 heads. The top hole is a larger hole so I needed a Phillips head the only mod. No pics as it is identical to the other OE I replaced, other than the KAE is one piece not 2. More in my owner thread.


    Getting this up was a no go. I had to press the plastic screen in covering the evaporator to slide old heat sink out and new unit in. Not easy at all, thankful I did not break the plastic
    screen.
    Attached Images Attached Images
    Last edited by nocfn; 04-15-2017 at 05:59 PM.
    1994 E500
    249/275 - 8F19 or 8F32 or 8320

    1991 560 SEC
    199/268
    2014 E350 Cab 799/264

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    500AMM (04-16-2017), emerydc8 (04-15-2017), gsxr (04-16-2017), JC220 (04-15-2017)

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    Re: Facelift Blower Fan Resistor/Regulator Replacement

    Quote Originally Posted by gerryvz View Post
    I did it on a certain white 1995 station wagon about 2010, but unfortunately didn't photographically document the process. It's not a horrible job.

    Just be sure not to lose any of the small metal clips down I to the abyss when cracking apart the blower motor box. IIRC the new regulator came with a new heat sink. It was a bolt- and plug-in thing. I did the fan and the regulator at the same time -- that way avoiding having to re-open the box to replace the other component.

    Also, use the opportunity on late cars to replace the cabin air filters.
    Regulator on said wagon appears to need to be replaced again. Fan stopped working. I hot wired the fan and it works. Checked the 30 amp fuse and it is fine. I'm down to the regulator.

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