The Balboa Circuit Board VS511SZ (54385-03) is a genuine Balboa Water Group board providing reliable control for compatible spa systems using the VS511SZ platform.

Specifications:

• Brand: Balboa Water Group
• Model: VS511SZ
• Part no: 54385-03

Fits/replaces:

• Spa systems using a Balboa VS511SZ circuit board
• Match the model number stamped on your existing board exactly — VS511SZ variants are not interchangeable

Common signs you need this part:

• Spa won't power on, or trips the breaker repeatedly
• Pumps or heater 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. This involves 240V wiring — professional installation by a licensed technician is recommended.

FAQ

How do I confirm this is the right board? Match the model number stamped on your existing board exactly — VS511SZ variants are not interchangeable.

Should I install this myself? This involves 240V wiring — use a licensed spa technician unless experienced.