Government assistance programs (including LIHEAP) may pay for a free air conditioner or for repairs to an AC unit. As part of this program, low-income families may receive grants. You can often get a free air conditioner at thrift stores like Goodwill, Salvation Army, and St. Vincent de Paul Society. Most of these places have the latest appliances, and they usually give away the older ones. Don't hesitate to contact these charitable stores.