Clutha District Council service delivery operations manager Paul Jamison said it was discovered the circulating pump was not working when regular maintenance on the pool was started a few months ago.
A small amount of water was left in the pool during the off-season to prevent the base from cracking as it had done in the past.
However, the water caused some mild discolouration to the base which needed to be water-blasted.
When the pool was filled with water again, it was discovered the circulating pump was no longer working.
``It had deteriorated over the off-season. There's no rhyme or reason for it.''
The pump was working at the end of last swimming season but failed this year.
As the pump was quite old, a replacement had to be manufactured specifically for the pool.
The previous pump had an estimated 30-year service life and the new one was expected to last a similar amount of time.
The new pump will be installed upon its arrival in mid-November.
The pool was usually opened at the end of October or start of November. Mr Jamison hoped to have the pool opened as soon as the pump was ready.
``We're thinking the end of November as a worst-case scenario.''
