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climate control buttons don't work


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11 replies to this topic

#1 Rooster2

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Posted 30 September 2013 - 07:44 AM

My 99 OBW climate control buttons for air flow direction don't work. Press any button on the dash controller, and the air flow is always from the dash vents. Heater lever and motor fan controls work just fine. I couldn't find any write ups on this in the "search " section.  Any dvise??



#2 86BRATMAN

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Posted 30 September 2013 - 08:10 AM

Either soda or other spilled drink has gotten into the control unit or you have a bad mode door actuator.  There was a thread in the last week or so about cleaning the buttons.



#3 Rooster2

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Posted 30 September 2013 - 09:42 AM

Either soda or other spilled drink has gotten into the control unit or you have a bad mode door actuator.  There was a thread in the last week or so about cleaning the buttons.

Yes, I remember the thread about cleaning the buttons. I think I replied to that with cleaning advise. My buttons are not sticking, I see no evidence of soda residue.  What is a mode door acuator? Is that the dashboard contol HVAC unit??



#4 MilesFox

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Posted 30 September 2013 - 09:53 AM

I am salvging a 95 legacy wagon, if your part is broken, i will have one available to you.



#5 86BRATMAN

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Posted 30 September 2013 - 10:34 AM

The mode door actuator is the electric motor that changes the settings on the heater box itself.  Its way up under the dash at the top of the heater box itself.  I can snap you a picture of the piece this evening after work. I have the dash out of my second 97 legacy so the actuator is in easy view.



#6 Rooster2

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Posted 30 September 2013 - 01:37 PM

Update.........upon further investigation, I did see where some sticky soda residue was around the HVAC buttons. I can thank my daughter for that. I cleaned the buttons off well with Windex, and wiped off with a paper towell, but air output is still only through dash vents. In the past I have gotten the Windex to work well, but not today.

 

I had a similar problem with my 98 OBW, and fixed that with a replacement HVAC dashboard controller from a wrecking yard. Maybe I need to do that again. I spotted one at a local pull-a-part recently, so I will snag that one.

 

The mode door actuator sounds difficult to reach on top of the heater box. I would prefer not to replace the unit, without first seeing if a new dashboard controller fixes the problem.

 

Thanks 86Bratman for the offer of the picture. I will get back to you, if and when I need a picture.

 

Thanks guys.....................Larry (Rooster2)



#7 Fairtax4me

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Posted 30 September 2013 - 04:27 PM

Do the LEDs under the mode buttons light up when the mode is selected? If the LEDs don't light up id suspect the control head to be bad.
The mode actuator gets its power from the control head, check the fuses before replacing the control head.

#8 Rooster2

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Posted 30 September 2013 - 06:37 PM

Final update............I removed dash panels to check wiring on back of dah control unit. Just for giggles, I sprayed heavily again with Windex, kept pushing all the buttons, and wiping away the Windex with a paper towel. This time, the cleaning worked. I got all buttons to work, and I could see the flap move behind the dash air outlets, to know the flap was opening and closing. I am amazed that so little dried Coke sugar syrup can disrupt the selector buttons from working properly. So all is well.......saves me a trip to a yard to buy a replacement control unit.

 

Thanks again for all the sound advise................Larry (Rooster2)



#9 86BRATMAN

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Posted 02 October 2013 - 03:31 PM

I know you have this figured out, put I'm putting this here for future searchers.

 



#10 Rooster2

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Posted 02 October 2013 - 06:30 PM

Good picture thanks!



#11 Fairtax4me

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Posted 02 October 2013 - 09:44 PM

Good to hear you got it working. Only have to get a small amount of sticky drink behind ONE of the buttons and the rest will not work. If one button stays stuck on the mode will not change.

#12 CarleeGresham

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Posted 14 November 2013 - 10:36 PM

Either soda or other spilled drink has gotten into the control unit or you have a bad mode door actuator.  There was a thread in the last week or so about cleaning the buttons.

Can anyone link me to this thread?






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