Tauranga City Aquatics director David Stewart said the electrical fault was discovered on Saturday. It affected the heating of the pool and the decision was made to fix it straight away.
"One could say it was bad luck. It is something that has happened and, as a director, I need to understand what happened and why, and whether it could have been foreseen."
Mr Stewart said it was not desirable that the failure happened during a long weekend because it had serious consequences on revenue.
"It sounded like something that could not be foreseen," he said. Work on replacing the cable and pump motor finished yesterday.