Need your opinions on this used insert..fireplace xtrordinair 33

I'm glad the install worked out! Honestly.... I'd try it without a blower and see how it does. Do you have a ceiling fan in the area? They do way more work than a stove blower does. That said.... I have a ceiling fan in my A-Frame and it alone spreads more heat than a convection blower could pretend to. I'd try it without for a bit.
Is the snap disc making a good connection to the stove body? Have you tried running a jumper wire between the wires that attach to the snap disc? It could be the temp sensor. I'd check that before you go off and buy a blower. You can also test the blower on 110 at the motor to see if it's a wiring problem but that's rare.

Check the snap disc before you buy a new fan, and try it without.....

Just a thought, how hot did you get the fire? It sometimes take a really established fire to kick it on.

It looks like it belongs there! You should be able to solder the wire back on if indeed that is the problem. If there are other problems you'll know after you try the blower again.

Think I'd want to contact the PO first and see what he knows about it, in case something's shorted out or whatever, or if you can't do that, then thoroughly check it electrically before doing anything.