1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

I think...my AC stopped working after my e fan swap.

Discussion in 'Maintenance' started by Fourstar07, Jun 21, 2016.

  1. Fourstar07

    Fourstar07 Active Member

    Messages:
    1,399
    Over the winter I used Nelson harness with my e fan/34" rad swap. Now that it's hot out my AC is blowing warm air and clutch engages for 2 seconds and shuts off intermittently, the gauges read high and low pressure normal so it's not like it's low on coolant. Any suggestions?
     
  2. Khaos

    Khaos Bed Dent Club Founder

    Messages:
    20,562
    Check the harness, any relays melted? Are you getting power to the fans? Is the coolant level where it should be, no air bubbles or anything?
     
  3. Cleanoh4

    Cleanoh4 Well-Known Member

    Messages:
    4,600
    I think he meant refrigerant when he said coolant.


    That being said, like Chris suggested, check the relays and see if you just got a bunk one. If good, recheck your wiring and make sure you have good grounds. Once you installed, did you check for full operation? Also I remember from a separate issue I had in the past, that BBP said that the addition of the E-fans may cause an excessive draw on the alt. resulting in an underpower issue, which could be causing the compressor to cut out to save itself from burning out. So it may have enough power to run the fans with no issue when only the demand to cool the engine is present, but not enough to handle the additional draw of the A/C. What size Alt are you running? Do you have any other added electrical?

    Outside of that it could just be coincidental and a compressor issue.
     
    Last edited: Jun 21, 2016
  4. Ginger

    Ginger Bubbles

    Messages:
    24,028
    i have the same exact harness and mine works fine, sounts like a compressor issue
     
  5. Cleanoh4

    Cleanoh4 Well-Known Member

    Messages:
    4,600
    Found my old post from BBP, they suggest a min 145a alt with efans
     
  6. Ginger

    Ginger Bubbles

    Messages:
    24,028
    i do have the highest OEM amp alt available on my truck though.
     
  7. Khaos

    Khaos Bed Dent Club Founder

    Messages:
    20,562
    There was a 160a option on some trucks.
     
  8. Ginger

    Ginger Bubbles

    Messages:
    24,028
    i think thats what i have on my ttruck.
     
  9. Cleanoh4

    Cleanoh4 Well-Known Member

    Messages:
    4,600
    I have a labeled 200a aftermarket and no issues
     
  10. TechieTruckGuy

    TechieTruckGuy 3.5 EcoHell

    Messages:
    4,792
    I believe the Cadillac alt was 160. When I replaced mine that's what I put in


    Sent from the 4.hate using tapaturd
     
  11. Fourstar07

    Fourstar07 Active Member

    Messages:
    1,399
    Yes sorry I did mean to say refrigerant not coolant. I'll check everything mentioned I did swap to a bigger alt 145 amp.
     
  12. Cleanoh4

    Cleanoh4 Well-Known Member

    Messages:
    4,600
    Did you have any other additional electrical?
     
  13. Fourstar07

    Fourstar07 Active Member

    Messages:
    1,399
    Just a new single din CD player, nothing too crazy.
     
  14. Cleanoh4

    Cleanoh4 Well-Known Member

    Messages:
    4,600
    No amp or anything?
     
  15. TwistedWrangler

    TwistedWrangler Active Member

    Messages:
    246
    Is it blowing hot on one side and cool on the other? Mine did this. I have the digital controls. There is a way to reset it if this is the case.
    This is what I did to fix it.

    Adjusted the passenger side to full hot and the drivers side to full cold and put the system in auto mode.

    Then, turned off the ignition and turned it back on. In auto mode you will see the fan speed auto adjusting up and down.

    Then, I reversed the settings, drivers full hot (90) and the passenger full cold (60). Put it in auto mode and turn off the ignition and then back on.
     
  16. Cleanoh4

    Cleanoh4 Well-Known Member

    Messages:
    4,600
    Thats more of a blend door issue. His compressor isn't staying on. It may explain the warm air if that was the only symptom, but not the disengagement of the a/c clutch.
     
  17. Jared

    Jared Administrator Staff Member

    Messages:
    20,565
    nelson sucks
     
  18. Fourstar07

    Fourstar07 Active Member

    Messages:
    1,399
    I have no amp. Today i tried to jump start the compressor with wire and it won't even engage. Checked comp fuses and relay and all look good. Assuming now as mentioned before could be coincidence the compressor went out during the swap.
     
  19. Ginger

    Ginger Bubbles

    Messages:
    24,028
    thats what i would assume.
     
  20. Dubyagee

    Dubyagee Dork

    Messages:
    342
    I would verify voltage at the compressor before I throw parts at it.
     

Share This Page