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Thread: AC/Heater

  1. #1
    Senior Member Brett's Avatar
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    AC/Heater

    Found this in the center console of a Mercedes. Yes center console.

    Its the AC/Heater unit for the rear of the car. I plan on using this in my car. It fits under the dash that I'm building nicely.

    Attachment 2964
    Attachment 2965
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    Attachment 2967

  2. #2
    ***Euro-Nova Supporter*** Spacenut's Avatar
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    That's neat - most A/C units seem to assume you have a massive great plank of a dashboard to fit stuff behind, so finding a A/C and heater matrix (with blower!) in such a compact, linear form factor is a real bonus.

    You seem to be on very good terms with your local scrappy
    only Pythagoras can save me now!

  3. #3
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    It also seems that you should have come on this site some time ago.
    So many good posts just recently, keep them coming Brett 👍

  4. #4
    Senior Member Brett's Avatar
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    Found a newer version of the AC/Heater unit.

    I've seen these on ebay but this is the second one I've found in the scrap yards around here. I didn't have enough cash on me at the time and by the time I got back it was gone

    This one is a little shorter but it got a little fatter in the process.


    P2140001.jpg

    P2140002.jpg

    P2140003.jpg

    P2140004.jpg

    I have no idea why the pictures of the first version are not showing up but here's the link to it on the sterling site

    http://www.sterlingkitcars.com/membe...-will-fit.html

  5. #5
    I know you had a control panel from the first version, but can't remember if you go the wiring sorted and had it working?

  6. #6
    Senior Member Brett's Avatar
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    Quote Originally Posted by islandman View Post
    I know you had a control panel from the first version, but can't remember if you go the wiring sorted and had it working?
    Yes I got it to work.

    The early style unit had no actuator servo to operate a blend door to direct the air to the top vents or bottom vents(it was done manually) so I pulled a actuator servo out of a cadillac and mounted it to the AC/Heater unit and it controlled the blend door flap. I also used the rear control panel out of the cadillac so there would be no issues operating the servo motor.

  7. #7
    Senior Member Brett's Avatar
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    Had another rainy day here so I spent some time on the car.

    Today I focused on seeing if I could get the HVAC system to work with no CAN connections.

    I had my doubts that it wouldn't work without the CAN connections wired in, but to my surprise the system worked.

    Well all most everything worked. The blower speeds didn't work. Blower just ran at low speed. Could be the control panel at fault. you can see in the picture that the display has issues.

    Even the actuator for controlling the direction of the air(up/down) worked and the duo valve for the heater worked(at least I could hear something working in it).

    P3100002a.jpg
    Last edited by Brett; 11-03-2020 at 01:23 PM.

  8. #8
    Just a side note: this “MOPF“ on that sticker means “Modellpflege“ which is the German word for facelift.
    Never give up!

  9. #9
    Senior Member Brett's Avatar
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    Quote Originally Posted by Supermario View Post
    Just a side note: this “MOPF“ on that sticker means “Modellpflege“ which is the German word for facelift.
    I always find it interesting how different countries(or even different regions of countries) call the same part by different names.
    I worked in the parts department of a motorcycle dealership and sometimes the manufacturers of the different brands of motorcycles had different names for the same part. Made it interesting sometimes trying to find the part you were looking for.

    OK back to the AC/Heater.
    Did some research and found out that "REST" in the display stands for "reset"
    I guess when there is an issue with the system trouble codes appear in the display and there is a procedure to reset the system to clear the code once the issue is fixed. Problem is, to reset the system you need the front control panel(or as Supermario's translation says "facelift").
    I guess this is when you need the CAN wires hooked up.

    Sooo close to having it working without the CAN system.
    Last edited by Brett; 11-03-2020 at 01:30 PM.

  10. #10
    Quote Originally Posted by Brett View Post
    I always find it interesting how different countries(or even different regions of countries) call the same part by different names.
    I worked in the parts department of a motorcycle dealership and sometimes the manufacturers of the different brands of motorcycles had different names for the same part. Made it interesting sometimes trying to find the part you were looking for.

    OK back to the AC/Heater.
    Did some research and found out that "REST" in the display stands for "reset"
    I guess when there is an issue with the system trouble codes appear in the display and there is a procedure to reset the system to clear the code once the issue is fixed. Problem is, to reset the system you need the front control panel(or as Supermario's translation says "facelift").
    I guess this is when you need the CAN wires hooked up.

    Sooo close to having it working without the CAN system.
    Me too, Parts manager for a Honda dealer and manager for Sondel Honda in London, many years. Still remember some of the more common part numbers. Even have a Honda parts mangers course certificate, somewhere.



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