Balboa Circuit Board - Jacuzzi R327/R641 [ME Serial Deluxe] (52211) switches A properly selected Invensys thermostat

A properly selected Invensys thermostat contributes to more dependable heater regulation and more accurate replacement performance

Replacing both parts together can help restore cleaner chamber sealing and routine refill access

and plastic body using the 510AD0167 reference

Vacuum gauge with 1/4 inch MPT connection and bottom-mount format

A properly selected ring terminal helps support cleaner crimp performance and contributes to more dependable electrical continuity

Balboa Circuit Board - Jacuzzi R327/R641 [ME Serial Deluxe] (52211) switches A properly selected Invensys thermostatBrand specific Jacuzzi systems depend on the right board to preserve the feel and logic of the original setup. This R327 R641 ME Serial Deluxe board is designed for compatible applications where the existing board has become the weak point and the spa no longer behaves with the consistency it should. When a board like this begins to fail, the spa often feels less polished long before it fully stops working. Heat, response, and overall control can all