'89 240 with analog climate control problem
 

So all my illumination bulbs work, blower motor works on all speeds, and I can move the temperature blend door with control unit, but I can't change the mode door position and none of the mode leds light up . It seems to be stuck in the vent position.

I've made sure I had power to the mode door actuator. I followed the pinpoint test in the shop manual (starting with ha 72. ) I even replaced mode door actuator and the control unit just for shitz and giggles.

All of my fuses are good. The mode door moves fine, so I know something isn't blocking the door

Anyone else have issues with their climate control?

Any help is appreciated and thanks in advance,
Tim

it sounds to me like you have a problem with the particular section in your climate controller, i have never heard of it happening in an s13 but my pathfinder which has basically the same type of climate control had a section go dark and all the buttons to change the vent directions stopped working, try changing the head unit i bet it will work, i even have one i could ship to you pretty cheap if you cant find one locally

I had the same problem. My buttons were kinda gummed up so I removed the whole unit and removed the electronics. The soaked the whole thing in warm water and cleaned with just a household degreaser. Reinstalled every thing and it worked perfect. There's a thread on installing led illumination and it showed how to split it apart w/o fuckin it up... Hope this helps

Thanks guys.
I tried a known good head unit just cause I had one lying around. It didn't change anything. I even tried a new mode door actuator, and still no change. I can manually change the mode door with the actuator off, so I know the actual door is ok.
I was thinking about just leaving the actuator off and moving it manually, but I'm trying to stay away from making this thing a missile.
I'll let you know if I find out anything else
Thanks again,
Tim

i have the same problem , timohtee where did u get the new actuator from ?

I unfortunately had to get one from the dealership. I wish I knew the part number.

price how much thanks

It was like 30 or 40 dollars?
If you wanna test your motor:
take it off the driver's side of the heater box
removed the cover (I think there's like 4 or 5 tabs)
apply 12 volts to the pins that go to the motor and see if it moves.

Both motors I had moved when I tested them.
Tonight I'm gonna check wiring to from the control head to the motor
I'll let you know what happens

So did you ever fin out what the problem was?

I have the same issue and can not find the solution anywhere

I did! I didn't have power from the control head to the motor. So i checked for power from the fuse to the control head and I had nothing. I spent more time tracing wires and found the wire from my fuse (I can't remember what color it was,) was cut, probably when my alarm was installed. So I fixed that wire and magically my climate control was fully operational!!

Nice I'll look to see any damages ti the wires


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