Sundance® 680 Series 2‑Pump SMT Control Board – 60 Hz (2013+) Part #6600‑682

⚠️ IMPORTANT DISCLAIMER – PLEASE READ BEFORE PURCHASING

• There are no refunds or returns on electronic spa parts.
• Please verify compatibility with your hot tub model before ordering.
• All electronic components are covered under the original manufacturer’s warranty.

Overview

Part 6600‑682 is the OEM 2‑pump control board for Sundance® 680 Series hot tubs equipped with the SMT (Smart Massage Technology) jet system introduced in 2013.
This PCB manages all major components of the 680 two‑pump platform, including:

• Jet Pump 1 & Pump 2 operation
• Heater safety & temperature control
• Filtration cycles (Smart Logic)
• ClearRay® UV readiness (model‑specific)
• LED lighting and accessory control
• System diagnostics (FLO, OH, Sn, watchdog faults, etc.)

This is the designated board for the 2013–2014 680 SMT electronics family and is the ONLY correct control board for the model list below.

Compatible Spa Models & Years

✔ Sundance® 680™ Series – 2‑Pump Models

2013–2014 (SMT introduction models)

• Hartford
• Hawthorne

2013+ (core SMT lineup)

• Edison
• Peyton

2014+ (refreshed SMT models)

• McKinley
• Ramona

All of these spas use the Sundance® 680 SMT two‑pump plumbing/heater/sensor architecture introduced in the 2013 redesign.

Technical Details

• Voltage: 240V, North American 60 Hz
• Pump Support:
  • Pump 1: 2‑speed
  • Pump 2: 1‑speed
• Electronics Platform: Sundance® 680 SMT Series (2013+)
• Heater Compatibility: 5.5 kW Sundance® stainless steel heater
• Topside Compatibility:
  • Sundance® 680 Series 2‑Pump SMT 2013+ control panel
• Sensor Inputs:
  • Temperature sensor
  • Hi‑limit sensor
  • Flow/pressure switch (model‑dependent)
• System Features:
  • Smart Logic Filtration
  • UV/ClearRay® indicator (if installed)
  • Low‑voltage LED lighting control
  • Diagnostic error reporting

Purpose & Performance

The 6600‑682 control board regulates and synchronizes all functions of the 680 two‑pump SMT hot tubs:

• Jet pump control & speed switching
• Heater operation & overheat protection
• Filtration timing and sanitation cycles
• System‑wide monitoring of sensors
• Status communication with the topside panel

This board resolves issues such as:

• Pump not running
• No heat / heater faults
• FLO / OH / Sn error codes
• Topside non‑responsive
• Random resets or watchdog conditions
• Lighting or auxiliary relay failure

Related / Replacement Components

• 680 SMT Topside (2‑Pump) — Required for correct operation
• 6560‑000 / 6600‑110 / 6600‑167 — Sensors
• 6500‑series heaters — Compatible 5.5 kW heater tube assemblies
• ClearRay® UV lamp & ballast — Model‑specific

Ordering Notes

• Fits ONLY 2‑pump Sundance® 680 Series SMT spas manufactured 2013 and newer.
• Will NOT fit earlier 680 (2006–2012) or later redesigned BP‑platform spas.
• Will NOT work in 1‑pump 680 models.
• Must match the SMT topside control panel.
• Electronics are non‑returnable once shipped or installed.