The Leeds boss has urged a note of caution over any potential sale of the midfielder.
The Leeds midfielder has been heavily criticised by supporters for some of his performances this season but Redfearn believes Austin is a 'big asset on his day.'
And the 49-year-old insists Leeds should not be too hasty in letting him go.
“On his day, Rudy’s a big asset. He was on it at Sunderland and the way he played showed what he can offer," Redfearn is quoted as saying by the Yorkshire Evening Post.
“He’s probably suffered from inconsistency at times but that’s something for us to keep working on. We’re talking about needing Championship experience and to be fair to Rudy, he’s got that experience. Other clubs in the Championship want it. They see something in Rudy they like. Perhaps we shouldn’t be too hasty in letting him go.
“If he wants to stay then that suits me fine. I think it would be a mistake to lose him. He’s a real handful when he plays like he did at Sunderland and that performance should do his confidence good.”