I think a another analogy is that you had a plumber do some work for you a day before a leak, and in the middle of the night the pipes start leaking and you ne

I think a another analogy is that you had a plumber do some work for you a day before a leak, and in the middle of the night the pipes start leaking and you need to call him out to prevent property damage. In that case I would absolutely not expect to have to pay extra because he warranties his own work.