LIHeap FAQ Frequently Asked Questions (FAQ) on LIHEAP programs in the United States. What is LIHEAP? Who is Eligible for LIHEAP? What are the income/resource limits and requirements for LIHEAP? How to apply for LIHEAP? When does LIHEAP start accepting applications? How much do I get from LIHEAP? How are LIHEAP payments made? What is the Weatherization Assistance Program (WAP)?