Defiant 2 in 1 thermostat replacement.

[Paul Herb]

I recently had a new defiant encore 2 in 1 2042 delivered. During the delivery the local team bent the air flow damper lever. The dealer sent someone out to replace the lever/thermostat, although I am not sure they knew exactly what they were doing. It seems to move the air flap in the back, although I am not sure it opens the same as it did before. I did run it before the replacement, and it seem to get a better air flow. Does anyone know if there are any adjustments ?? I see a screw on the flap in the back, what does that do...
Just looking for someone with technical experience on the stove, since I can not talk directly to VC.. and the dealer does not have anyone that understands the stove...

thanks.