When you removed the motor, did you take it apart? Did you test the motor with a 9V battery? These small motors seldom fail. Replacements can be had in any bone yard, one damper motor fits them all.

Be careful with the motor positioning. The sensors inside the black box must be in the exact position as when the motor is removed from the damper; The ECC unit knows the range of motion and stores that information for life.

Did anything get into the air stream that could block the damper?

How did you decide that the recirc damper was the problem?

Klaus,

Yes, I took the motor apart and I marked it when I took it out so as to put it back in the correct position when I was done.

I tested it with 12 volts and it moved fine in both directions.

I checked the damper by pulling on the wire and it appeared to move just fine and did not bind in any way shape or form so I believe there is nothing blocking it.

after I took it apart I put it back in and it moved fine just once then went back to doing what it was doing.

Went to the bone yard today and picked one up. Before I put it in, I rechecked the old motor I took it out with out it connected to the dampener and just hooked up to the electrical connection. I worked as before thus I know it is not the dampener being blocked.

I put the new used one in and it worked fine twice then it started doing the same thing. Any chance that the ECC is the problem? Is there any way to like reset the motor to factory default so that it will move in both directions freely?

Any other thoughts on this how to fix it?

Thanks,

Matt