Heater Control.

[Jack Wruff]

I've tried fairly hard to find the following info:

1. How do you access this panel ?
2. What is the value of the potentiometer, Ohms and Wattage?

I have replaced the mixer valve and when I checked its function, it looked scratchy.
Now, when I want to raise/lower the temperature, it is random. It reacts the same as a guitar volume pot that's been used a lot and breaks up the signal. Now when I pull out on the knob, it responds, until I hit a bump !!

Any help will be much appreciated.

 

[alumarine]

What year, make and model of vehicle is this?

On my 2000 4runner with manual heat/ac that control is not a potentiometer, it operates by cable the water/mixer valve on the firewall.
It might also operate a Air Mix Door as well.

If you can stick your head under the dash and operate that control you might be able to see what it's trying to do.

 

[phattyduck]

What year, make and model of vehicle is this?

Based on the image, it is an '01 or '02 SR5, which does have electrically operated heat/blend (though not automatic).

That part was never available separately, so you'll have to pull it out and check it for yourself. I don't expect it to be a standard part though (standard resistance, yes, but footprint/shape may be hard to match).

Hit it with some contact cleaner and see if that helps.

-Charlie