Won’t matter if he calls them or sues them. The laws on this were settled long ago.
The warranty is what it is and it’s in writing. Implied Consent law covers this too.
Obviously if he calls them and explains to them the circumstances they MIGHT, MAYBE, COULD help him out.
But I doubt it and it is worth a try.
I’ve questioned these warranties and called the lawyer that wrote out the warranty where I worked at the time and he told all of us the warranty was iron clad.
We got sued twice while I was there. Didn’t lose either.