600 Circuit Board (6UR 120) replaces 601 - 605 series boards. Includes a calibrated temperature sensor. If you are replacing a 601 or 602 board, you also need the Diehl Timer Retrofit Kit.
Accessories Spa Chemicals Hot Tub Covers Cover Lift Removers Filter Cartridges Spa Fragrances Hot Tub Ozonators Hot Tub Parts Pumps and Heaters