Took my 2005 Aveo to the local shop a few weeks back as the rad fan stopped working. He said it was a problem with malfunctioning sensors but that it was working fine now, which it was... till today. (He didn't change anything just said bring it back if it failed again.) Fan doesn't come on at all, when up to temp or when ac is turned on. Am hoping someone here can give me an idea of what to check myself to save a bit of cash.

Cheers.