Michael Schoch, Answers questions on Noodle
Unfortunately, I wasn't able to find any information on York Haven Preschool, nor could I find a phone number. I'll do more research and update this answer if I find contact information.
In the meantime, you can search for other preschools near Manchester on the Noodle School Locator. Another option is to contact Northeastern School District at 717 266-3667 about preschool programs offered at any of its schools.
Noodle has a series of articles Q&A pieces with some general ideas and advice for finding a preschool. You should check it out!
Hopefully this gives you some resources to work with. Feel free to ask more follow up questions any time you need! Best of luck!