At the moment we are experiencing a shortage of reconditioned main power control boards, however, we can offer a reconditioned unit with a NEW main power control board for $855. Going forward, once we have reconditioned main power control boards in stock again, we will be offering both options, and will advise if there is a delay in supply of either option at the time of ordering. https://aquamechservices.com.au/product/zodiac-tri-series-chlorinator-reconditioned-with-12-month-warranty/