Excellence since 1953 Wighton's is a Plumbing, Heating, and Air Conditioning company established in 1953. At Wighton's Ince, our customers are family. We have been a part of the San Luis Obispo County community for over 68 years. Our Strong values and quality workmanship have made us leaders in the Heating, Air Conditioning, and Indoor Air Quality industry on the Central Coast.