Components within the fan impeller units would wear and then cause the positioning actuator to operate under severe strain; that, in turn, damaged the drive gearing and burned out control boards within the actuator. The actuator was replaced several times at a cost of $1,250, he noted.
Spare parts, essential for the mechanical repair/replacement, also were becoming hard to find. Waiting for them to arrive from continental Europe often created downtime extending up to eight months. "With no air conditioning on the affected floor, the tenants then expected a refund," said Cannell.