Resolved 1G HVAC Control Knobs Falling out

[Yamadaaaa009]

Am I missing any parts on this? What can I do to keep this from falling off? Nothing is keeping them in and it easily falls off. It fell off one time when I was going uphill

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[Justin DuBois]

Is it supposed to be a friction fit, with the metal clip as spring pressure? or is the metal clip supposed to snap over a raised bump on the flat side of the knob shaft?

 

[DSMPT]

Loose because cracked?

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[19Eclipse90]

Loose because cracked?

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Exactly right. That “socket” can be changed / swapped pretty easily with a different good one.

They crack and get looser over time to the point that they fall out like you’ve described. You can see in the below pictures these are cracked along the same corner as yours.

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[Yamadaaaa009]

Did not realize that that's cracked. I may have to check the other 2 knobs as they have the same issue. Thank you!