pear tree

Question

what would make a pear tree look healthy but stop producing fruit

Answer 1

Do you have a second pollinator tree planted?

Lack of cold chilling hours can also be a reason for lack of fruit.

Trees that are stressed or diseased will also not produce.

Here are some articles that will help you pinpoint the issues.

https://www.gardeningknowhow.com/edible/fruits/pear/no-pears-on-tree.htm
https://www.gardeningknowhow.com/edible/fruits/pear/growing-pear-trees.htm