Is your tree getting the chill hours it needs?

In that climate, partial shade in the summer and winter can really help, for different reasons. I have noticed that in warmer climates, some winter shade can help compensate for inadequate chill hours, and in the summer the leaves can reall have trouble dealing with full sun in all that heat, especially when the air is dry.

Besides that you also want to consider the factor of pollination. If your tree does not get pollinated (by a different variety of pear) there will be no fruit!

Another factor that might need to be considered is age of the tree. Fruit trees generally become more productive after they have matured. For fruit trees on dwarfing rootstock this can be sooner rather than later. If your tree is only 2 or 3 years old and has not produced fruit yet, that really is not surprising.