The future of the ratings-challenged drama is in doubt, with exec Joel Wyman confirming that a final decision will be made this week.
"I hear warm and fuzzy things," Noble told TVLine. "But I've been hearing them all the time."
He added: "The fans have always been very supportive [and] I know the Fox executives actually like Fringe very much. But they run a business."
Fox's entertainment president Kevin Reilly revealed in January that Fringe currently loses money for the network.
"I think we'll be back," said Noble. "But we'll wait and see."
Fringe star Joshua Jackson (Peter Bishop) recently revealed that a "door" to a potential fifth run is "opened" in the upcoming episode 'Letters of Transit', airing April 20.
"If you watch that, you'll have an understanding of where [the writers] want to take the series," he said.
Fringe continues tonight (April 13) at 9/8c on Fox. In the UK, the series airs on Sky1.
> Fringe: 'The Consultant' in pictures
Watch a clip from tonight's Fringe below: