Sedlak was found dead in his Vancouver apartment on Friday, his family said.
At the age of 23, Sedlak represented Canada at the World Junior Chef Challenge in Auckland, New Zealand, where he won the silver medal. The next year, he won Food Network's Superstar Chef Challenge.
In 2007, Sedlak began hosting The Main, which ran for four seasons. He was also a judge on the network's series Family Cook Off.
A private funeral service will be held for Sedlak in Vancouver.