HVAC(manual) unit will not function; possible broken solder joint fix?

Discussion in 'Accord Tech' started by 001Stunna, Mar 18, 2014.

  1. 001Stunna

    001Stunna Well-Known Member

    Age:
    31
    Posts:
    3,203
    Likes Received:
    80
    Joined:
    Oct 21, 2008
    Location:
    Toronto, ON CANADA
    I've noticed at times my HVAC control unit(manual one), will not function aside from the fan speed knob. The buttons and air temp knob light up but their indicator lights do not. Pressing the A/C, Recirc, Rear Defrost or any of the air buttons does nothing.

    After tapping on it a few times or simply just driving on and giving it a couple minutes the indicator lights will come on and will work fine for the rest of the time.

    On mine this started happening after we had a few extremely cold days in here during the begging of the year.

    I've already checked the wiring and all is intact; I took a peek at the pcb board of the control unit as well but with my eyes I did not see any cracked solder joints

    Anyone had this issue before and fixed it(without buying another unit)? find out which joint was cracked and needed some fresh solder?
     
  2. james'99

    james'99 Well-Known Member

    Age:
    25
    Posts:
    1,584
    Likes Received:
    9
    Joined:
    Dec 27, 2013
    Location:
    East Fishkill, NY
    I did have this issue. No power at the voltage regulator. Ran a wire there and also had to run a wire to the recirculate bulb as that was intermittent as well. I can take a picture tomorrow.
     
  3. james'99

    james'99 Well-Known Member

    Age:
    25
    Posts:
    1,584
    Likes Received:
    9
    Joined:
    Dec 27, 2013
    Location:
    East Fishkill, NY
    Last edited: Feb 7, 2015
  4. BullAccord

    BullAccord Well-Known Member

    Posts:
    84
    Likes Received:
    0
    Joined:
    Apr 16, 2013
    Location:
    Durham, NC
  5. james'99

    james'99 Well-Known Member

    Age:
    25
    Posts:
    1,584
    Likes Received:
    9
    Joined:
    Dec 27, 2013
    Location:
    East Fishkill, NY
    Haha! Awesome! Let me know how it works out for you!
     
  6. BullAccord

    BullAccord Well-Known Member

    Posts:
    84
    Likes Received:
    0
    Joined:
    Apr 16, 2013
    Location:
    Durham, NC
    [UPDATE!!!!] So i did the fix and so far so good it was pretty simple and that's coming from someone with probably 30 minutes worth of soldering experience.

    thanks again for the post. James'99

    I'll update if anything happens.
     
  7. james'99

    james'99 Well-Known Member

    Age:
    25
    Posts:
    1,584
    Likes Received:
    9
    Joined:
    Dec 27, 2013
    Location:
    East Fishkill, NY
    Not a problem. Glad to be of assistance!
     
  8. Bombda

    Bombda Member

    Posts:
    10
    Likes Received:
    0
    Joined:
    Mar 5, 2014
    Location:
    Ft. Lauderdale
    I gotta bump this thread, the link won't work for me.
    :shrug:

    Also, it's about to be summer here in SoFla. That AC will be clutch.
     
  9. james'99

    james'99 Well-Known Member

    Age:
    25
    Posts:
    1,584
    Likes Received:
    9
    Joined:
    Dec 27, 2013
    Location:
    East Fishkill, NY
    Unfortunate that the guy took down his site. I am on vacation so I cannot demonstrate verifying the failure with a multimeter but I will take a picture of my repair. You're gonna need to run a wire from the 12v power supply on the board to the 5v voltage regulator. I will take a picture of my repair momentarily.
     
  10. james'99

    james'99 Well-Known Member

    Age:
    25
    Posts:
    1,584
    Likes Received:
    9
    Joined:
    Dec 27, 2013
    Location:
    East Fishkill, NY
    Okay, here is where the wire runs...

    [​IMG]

    [​IMG]

    [​IMG]
     
    Last edited: Jun 12, 2014

Share This Page