A/c Blend Door Actuator/motor Problem

[No Crust Racing]

Hey all, got a SII R33 and when I move the temp from 18 to 19 degrees and look at the blend door motor/actuator controller thing (on the left of the driver side foot well) I've noticed it goes full lock and blasts out hot air rather than moving gradually and allowing any variance between super cold and super hot.

Anyone else had this problem? I'm not sure if it's the little motor thing or something else.

Cheers

=)

[Al]

I would assume that to increase the cabin temp by 1deg, would take a while, so it should go to full hot untill the temp increase is detected by the temp sensor in the dash.

My theory may be wrong, just sounds logically correct.

[No Crust Racing]

I've got it on manual though, not auto. I woulda thought it only did that or something similar on auto?

[Al]

I would think it will still open fully till the sensor picks up the change in temp.

I may be wrong, but the "auto" feature controls the fan and a/c speed. So if you add a degree but keep the fan at 1/4 speed, then the heater position has to change to raise the temp.

[RANDY]

correct... auto controls the fan speed to bring the temp up or down, and then maintain the temperature that you selected.

setting it to 24 or something will still make the unit blend the two together.

[No Crust Racing]

I would think it will still open fully till the sensor picks up the change in temp.

I may be wrong, but the "auto" feature controls the fan and a/c speed.  So if you add a degree but keep the fan at 1/4 speed, then the heater position has to change to raise the temp.

<{POST_SNAPBACK}>

Based on that I'd be thinking that the temp sensor would be shot then... as changing from 18 to 19 degrees should not induce full blast heat, lol. I'll test the theory on the way to work tomorrow by setting it at 19 for as long as I can bare the heat!

[Al]

Do you know where the temp sensor is?

If you have removed the dash insert, in the past, it is quite possible the the vacumm hose has come off, or is not connected properly.

[No Crust Racing]

I've never removed it and am the first owner in Aus but who knows if it was done before. Where is it located and what is the sensor looking thing at the very left of vents on the top of the dash near the bottom of the windscreen?

[Al]

I've never removed it and am the first owner in Aus but who knows if it was done before. Where is it located and what is the sensor looking thing at the very left of vents on the top of the dash near the bottom of the windscreen?

<{POST_SNAPBACK}>

Not sure what you are refering to here, a pic may help things

Just to the right of the clock, behind the steering wheel, there is a column of slotted vents, measuring about 10mm(h) X 5mm(w). When you take the insert off you sould see a 10mm vaccum hose connected to it. Once the hose is removed you will be able to see the little sensor.

[No Crust Racing]

What I'm referring to looks like what a Commodore has on the dash to measure sunlight and turn on the headlights automatically. I'll have a look at what you're talking about, cheers for the info.

[No Crust Racing]

Tried your theory, switched it from 18-19 and waited like a mofo and baby did it just keep on pouring out hot air =D So either the temp sensor is stuffed or the blend door controller is busted and doesn't have variation, just has full lock hot or cold. Can someone please get in the driver side footwell and change from 18-19 and watch the blend door motor, tell me if it goes full lock or not.

Cheers

[RANDY]

OK... I checked mine today, to see if I could narrow down my clicking noise..

It's a cold day today, slightly rainy. If I press "up" on 20 degrees, I hear the actuator move a little, and the air feels warmer. Each time I push it up I hear another little actuator movement, and the air gets consistently warmer until about 30 degrees... my motor was still warming up at that stage.

So... based on that, i'd say you may have a problem. I tested using the blower on "face", outside air (not recirculated) and no A/C. Tested on fan speed 1 and 2.

AND! My clicking only occurs when I turn the car on, or after that, only when I choose "feet". All the other vents switch smoothly and quietly. (gotta find that other thread now!)