2001-Present Jacuzzi Hot Tub Spas Topside ERROR Codes

Jacuzzi Topside Error Codes (2001-Present)

Sensor Errors

Code Reason Cause Fix Parts Needed
Sn1 High Limit Sensor High limit sensor reading is outside normal range. Replace the high limit sensor. Replace OH Sensor
Sn2 Temperature Sensor Temperature sensor reading is outside normal range. If water is not hot, replace the temperature sensor. Replace Temp Sensor
Sn3 Temperature Sensor Temperature sensor values are incorrect. Replace the temperature sensor. Replace Temp Sensor

Water Flow Issues

Code  Reason Cause Fix Parts Needed
FL1 Low/No Flow Water flow is insufficient; heater disabled.
  • Flow detected? → Replace flow/pressure switch.
  • No flow? → Replace circulation pump or #1 jet pump (model-dependent).
 Flow switch, pressure switch, pump
FL2 Failed Switch Flow/pressure switch malfunction. Replace the flow switch (24/7 circ pump models) or pressure switch (models with #1 jet pump). Flow switch or pressure switch

Temperature Warnings

Code  Reason Cause Fix Parts Needed
COOL Low Temp Water is 20°+ below set temperature. If heating, wait. If not, check heater or PCB. Heater element or PCB
ICE Freeze Risk Spa is in emergency mode to prevent freezing. Ensure heater is working. If not, troubleshoot heater or PCB. Heater element or PCB
OH Overheat Water exceeds 112°F.
  1. Confirm actual water temp.
  2. If false reading: Replace temp sensor.
  3. If overheating: Check for solar heat, prop cover open, or replace PCB.
 Temp sensor, OH sensor, or PCB

⚠️ System Errors

Code  Reason Cause Fix Parts Needed
---- Watchdog PCB detected an unidentifiable issue. Replace temperature sensor first (common fix). If unresolved, check other components. Temp sensor or PCB
HOLD Overloaded Input Too many button pressed too fast. Wait and press buttons more slowly. None
Thermometer PCB Overheat PCB box is overheating. Allow PCB to cool; error will reset automatically. None
PnL Panel Connection Loose/damaged topside panel connection. Power off spa, unplug, and reconnect the topside panel. Check wiring connections

General Troubleshooting Tips

  • Turn Power Off First: Always turn off power before unplugging/reconnecting components.
  • Sensor Checks: Most errors (e.g., Watchdog, OH) are often resolved by replacing temperature sensors.
  • Seasonal Issues: Overheating (OH) in summer may require propping the cover open for ventilation.
  • Call Live Tech 858-210-8062.  Have ready Year, Make, Model of your Hot Tub
May 7th 2025 SpaStore.com

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