Excellent 4.9 | 18,452 reviews

MASTER SPAS PACK, MS90U 825 3RD SENSOR - x300739

MASTER SPAS PACK, MS90U 825 3RD SENSOR - x300739

$434.99
$434.99 $579.99
SAVE 25% Sold out
MASTER SPAS PACK, MS90U 825 3RD SENSOR - x300739

MASTER SPAS PACK, MS90U 825 3RD SENSOR - x300739

$434.99
$434.99 $579.99
SAVE 25% Sold out

MASTER SPAS PACK, MS90U 825 3RD SENSOR - x300739

PACK, MS90U 825 3RD SENSOR CONTROL PACK FOR MASTER SPAS

What our Experts Think
  • Direct OEM replacement upgrade: The ML900 topside is the official replacement for the discontinued MAS560 control panel, ensuring proper system compatibility and dependable performance.
  • Modernized control interface: Offers a clearer, more responsive user experience for managing key spa functions like jets, temperature, lighting, and blower settings.
  • Improved reliability over legacy model: Designed to replace aging MAS-series panels that are prone to wear, condensation issues, and button failure over time.
  • Full spa function control: Acts as the primary communication interface with the spa’s control system, keeping all core functions running smoothly and accurately.
  • OEM fit and plug compatibility: Engineered for straightforward replacement with compatible Master Spas systems using standard connections for reduced installation hassle.
  • Essential repair solution: Ideal for restoring full spa functionality when the original MAS560 panel becomes unresponsive or discontinued.

Q&A

Q: What is the MASTER SPAS ML900 Topside Control Panel (X310801)?
A: It is an OEM replacement spa control panel used to operate jets, temperature, lights, and settings on compatible Master Spas systems.

Q: What does it replace?
A: It replaces the older MAS560 control panel (X310840), which is no longer available.

Q: Is this an original OEM part?
A: Yes. It is a genuine Master Spas / Balboa ML900 topside control panel.

Q: What spas is it compatible with?
A: It is designed for select Master Spas models using compatible Balboa EL/GL control systems—always verify fit before ordering.

Q: What functions does it control?
A: It manages key spa functions including pumps, jets, blower, lighting, temperature, and mode settings.

Q: Does it include the overlay?
A: Depending on supplier, it may come complete or require a matching overlay—check listing details before purchase.

Q: Why was MAS560 discontinued?
A: It has been superseded by the ML900 upgrade, which offers updated compatibility and availability.

Q: Is installation easy?
A: Yes for a qualified technician or experienced DIY installer—typically a direct swap with matching connector and mounting layout.


Maintenance Tips
  • Keep the ML900 topside dry and properly sealed—moisture intrusion is the #1 cause of display failure in spa keypads.
  • Clean only with a soft microfiber cloth and mild soap solution; avoid chemicals that can degrade the overlay or touchscreen coating.
  • Inspect the faceplate gasket and perimeter seal regularly; re-seat or replace if you notice lifting, gaps, or stiffness.
  • Avoid excessive pressure or sharp objects on buttons/touch areas to prevent internal membrane damage.
  • Do not spray water directly at the topside during cleaning—wipe only, especially around button seams.
  • Ensure the spa cover is not leaking chemical vapor onto the panel after dosing (leave cover slightly open after shocking).
  • Periodically check the cable connection at the spa pack for corrosion, tight fit, or pin damage.
  • Disconnect power before servicing or replacing the panel to avoid board or communication damage.
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