Company did plumbing work for most if not all the new builds in our neighborhood. Our water heater went out and service response was quick, within twenty minutes.
However, it ended up being just the pilot light and the tech was able to get us back up running in two minutes. Service charge: $125
While we did not expect free service, a pro-rated charge would have been the right thing to do.
All the other contractors that have come out to the house over the last two years that were involved in the house build did their touch-ups or service checks completely for free.