The Malaysian business tycoon took over the club in August and provided the financial clout for manager Neil Warnock to bring in a host of players.
Reports on Thursday suggested Fernandes was ready to block such spending this January due to reservations over whether Warnock is the right man for QPR.
The AirAsia chief executive on Friday used Twitter to tell fans to ignore the speculation, although he did admit only success will keep people in their job.
"Guys at QPR, there is no freeze of cash. Don't listen to ambiguous press reports," he said.
"We are disappointed where we are in the league.
"This is a journey not a sprint. Along the way we learn.
"But we continue to develop and along the way hard decisions need to be made. But we never stop moving. Never.
"It's important to note no one job is safe. Results are key.
"If I don't deliver I would be the first to step down as chairman.
"We owe it to all the fans. Good money is paid and results are key.
"I will leave no stone unturned to make QPR a success. But if I fail I have to go. I will give it 150 percent effort."
