[SamuelAdams]

It noticed a flooding area due to low grass by the walkout door. It noticed mixed 15 and 20a receptacles on the same circuit. It noticed warped siding and recalled circuit breakers still in use.

[jimmaswell]

15A and 20A receptacles on the same circuit sounds fine as long as it's a 20A circuit? And how could it tell which outlet is on which circuit?

[MagicMoonlight]

It can’t, but it’s read reports before so it sure can simulate an answer.

[OJFord]

To give it the benefit of doubt, it's possible it saw a circuit labelled "kitchen" in the panel, and then in photos of the kitchen saw mixed outlets.

(I'm not in the US - would a 'home inspector' actually go around buzzing out outlets anyway?)

[dgemm]

They won't necessarily map out all the circuits but they will generally test them all with a tester to find wiring problems.

[wil421]

Yes, most will at least test GFCI receptacles especially in the kitchen. I bought one to test my basement after a renovation.