On 2007-04-16 12:00:20 -0400, "mikegold" said:

Just started up my Generac Natural Gas generator for the first time
today.

Transfer switch automatically switched over to generator power as
expected however, when I turned utility power back on the switch did
not transfer back to utility.

I had to open the switch and manually transfer back to the utility
position.

This happened both times I tested.

Any input as to what would prevent the switch from switching back to
utility?

Problem found and solved by the electrician!

Turns out that there was a wire, in the generator control panel,
pinched under the grounding screw.

Works perfectly now.