The $3.4 million program will run through April 30, but could be extended if funds are still available.
Customers buying Energy Star qualified refrigerators, freezers, washers or air conditioners can receive rebates of up to $100.
Those buying central air systems can get up to $500 back.
Gov. M. Jodi Rell says the idea is to help stimulate the economy and give consumers the opportunity to replace less energy efficient appliances.
U.S. Department of Energy distributed $296 million nationwide for appliance rebates. Connecticut's share is expected to pay for more than 42,000 appliance purchases.