For the past 2 days, my Jandy control box has been giving me the Service code 170. According to the troubleshooting guide, this issue appears to be caused by a bad Flow Sensor. I know the part number for this sensor is R0452500 - but depending on the site I go to for this part, they all have different connections to the Jandy Control box. My existing part has a "small board" attached to the Jandy Control box connection, however, depending on the site, some have this board, some don't. Does anyone know what the difference is and which one I should get? Thank you in advance!!