PA28-236 carb heat lever vibration

[DesertNomad]

I got my Dakota out of annual today. One issue showed up new:

1. At cruise, when my carb heat is off, the lever vibrates so that the lever moves down (towards the ON position) about 1" - maybe a bit less. If I push it all the way off, it vibrates itself down a bit - I don't think it is opening the heat at all - once it finds any resistance it stops, but it didn't do this before. What might cause this? I returned it to my shop to investigate.

 

[coloradobluesky]

Ah, you have the self adjusting carb heat model. Just kidding. Yes, you should get it fixed.

 

[Checkout_my_Six]

could be a loose P-clamp (Adel)....or maybe it needs another one to secure the cable?