Make a decision
Second opinion versus repeat visit
One scope
A repeat visit lets the original contractor address a documented incomplete task.
The other scope
An independent opinion tests the diagnosis and major repair scope.
A concrete example
If the first company omitted a promised return branch, ask it to complete the contract. If it alleges an expensive heat exchanger defect, request independent qualified assessment of that diagnosis.
Which question settles it?
For disputed expensive work, preserve photos and measurements before a second contractor arrives.