The Sundance Spas / Jacuzzi Circuit Board (6600-390) is an updated-version circuit board for Sundance Spas and Jacuzzi Spas electrical systems, fully compatible with the boards it replaces.

Specifications:

• Brand: Sundance Spas / Jacuzzi Spas
• Update: Newly added surface mount terminals for the heater
• Part no: 6600-390

Fits/replaces:

• Replaces part number: 6600-164 (also listed as 6600164)
• Replaces part number: 6600-176 (also listed as 6600176)
• 100% compatible with systems currently using either of the above part numbers

Common signs you need this part:

• Spa won't power on, or trips the breaker repeatedly
• Pumps, heater, or lights don't respond to topside controls
• Persistent error codes not resolved by sensor or switch replacement

Returns & installation: Circuit boards are electrical components and are non-returnable once opened, per our Terms & Conditions. Professional installation by a licensed technician is recommended.

FAQ

Will this replace my 6600-164 or 6600-176 board? Yes — 6600-390 is a newer version that's 100% compatible with systems currently using either part number.

What changed from the earlier boards? This version adds surface mount terminals for the heater connection.

Can I return this if it's the wrong part? No — circuit boards are final sale once opened, so confirm compatibility before ordering.