In February 1991 Carr was appointed as manager of Maidstone United, who had just sacked Keith Peacock following a run of poor results. Carr's time at Maidstone was also unhappy; a series of poor signings and baffling tactical decisions saw the team slump towards the foot of the table, and the Maidstone fans chanting for the board to sack him, which they did in October 1991, less than a year before the Kent side were forced to resign from the Football League.