hi,
really need help on this before i burn the car out!!!!!
started off with drivers side only blowing cold air, hot on passenger or whatever that set at.
so im thinking blend motor, stripped dash out, checked for sticking flaps, all ok.
next removed blend motors on drivers side and powered up to see if any motion, which i had on the distribution motor but not the temp motor.

heres the dilemma, tried another set of three motors, still the same.
tried another hevac still the same, and both hevacs show the book symbol.

so i stripped the blend motor apart and ran 12volts direct to check if motor powered up, which it did.

next checked all wires from that motor via multimeter back to the plug for continuity, all ok.

when i power on the ignition i see the motor turn for a moment, and thats it, nothing more.

passenger side ok, distribution ok, but nothing on drivers side, what the hell else can i do please!!!!

I had the same with a secondhand blend motor
it moved a bit not much, brought a new one and that worked
fine.

Hi,

Iv'e got hot air from drivers side and cold on passenger side so your not alone....lol.

thing is though, i tried another and that was the same, so i took mine apart and ran a 12volt across it and the motor ran sweet.

The motor also has a potentiometer whic tells the Hevac were it is. There is a swedish site which tells you how to overhaul your blend motors and replace the pot.

http://www.stockholmviews.com/p38/index.html#blend

scottdej said:

thing is though, i tried another and that was the same, so i took mine apart and ran a 12volt across it and the motor ran sweet.

Click to expand...

If the HEVAC doesn't get a signal from the position potentiometer, there will be no signal to move the motor