Arctic Spas
Arctic Spas Hot Tubs & Spas Error Codes
Complete list of fault codes and troubleshooting guides. Use the search below to find your specific error.
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CHEM
Display shows CHEM, LOW CHEM, or similar; integrated chemical management system indicates an issue.
Chemical Management or Salt System Fault
COL
Display shows COL or COOL, heater does not run and spa may run pumps periodically; water is below set temperature.
Cold Water Protection / Cool Condition
DR
Display shows DR or DRY, heater is disabled; spa may attempt to start and then shut down with this code.
Dry Fire Protection / Low Water in Heater
DY
Display shows DY or DRY YET, often following a DR code; spa may lock out heater.
Dry Heater Lockout After Repeated Dry Condition
ECON
Display shows ECON or EC, spa does not heat continuously and may not reach set temperature during heavy use.
Economy Heating Mode Enabled
FIL
Display shows FIL ERR or FLTR, filtration cycle does not run as expected or spa indicates filter error.
Filtration Cycle or Filter Monitoring Fault
FLC
Control panel displays FLC (flow closed) even though water appears to be circulating; heater will not engage.
Flow Switch Stuck Closed or Shorted
FLO
Control panel displays FLO or FL, pumps will not run or heater will not turn on, spa may shut down shortly after startup.
Low or No Water Flow Through Heater
HL
Control panel shows HL or HLo, spa shuts down heater and sometimes pumps; water may feel extremely hot near heater outlet.
High Limit Overheat Trip
Htr
Display shows HTR ERR or Htr, heater does not turn on even though pumps run and temperature is below set point.
Heater Circuit Failure
ICE
Display shows ICE or FR, pumps may run automatically even when spa is not in use; heater may cycle frequently.
Freeze Protection Mode Active
LOC
Display shows LOC or PANEL LOCK, buttons on the topside control do not respond.
Topside Control Panel Lockout
O3
Display shows O3 ERR or OZONE, ozone indicator off; ozone generator not running.
Ozone Generator Fault
OH
Display shows OH or OHH, spa shuts down all functions; water in the tub feels very hot (often above 40–42°C / 104–108°F).
Spa Water Overheat Condition
P1
Display shows P1 ERROR or P1 FAIL, first jet pump does not start or trips immediately.
Pump 1 Circuit or Motor Fault
P2
Display shows P2 ERROR or P2 FAIL, second jet pump does not run or trips breaker when activated.
Pump 2 Circuit or Motor Fault
PF
Display shows PF or PFAIL, spa will not start normal operation after power is restored.
Power Failure or Line Voltage Error
Prr
Display shows PRR or Prr, pumps may not start correctly after power-up; spa may be stuck in priming mode.
Pump Priming Error
SE
Display shows SE or SEr, spa may behave erratically or not respond to button presses.
Software or EEPROM Error
SN1
Display shows SN1 or SENSOR1, spa may not heat or may shut down; temperature reading may be erratic or show dashes.
Primary Temperature Sensor Failure
SN2
Display shows SN2 or SENSOR2, spa may run but heater may be disabled or behave erratically.
Secondary or High-Limit Sensor Failure
UV
Display shows UV ERR or UV, UV indicator light off; water treatment system not operating.
UV Sanitizer System Fault
Symptom
Air blower (if equipped) does not turn on or is very weak.
Air Blower Failure or Restriction
Symptom
Air controls (venturi knobs) do not change jet intensity or suck in air.
Air Control or Venturi Blockage
Symptom
Cabinet panels are warped, rotting, or coming loose.
Cabinet Structural Degradation
Symptom
Cover lifter or spa cover is difficult to open/close and does not seal properly.
Cover and Lifter Mechanical Wear
Symptom
Diverter valve is hard to turn or leaks water around the handle.
Diverter Valve Seal Wear or Obstruction
Symptom
Loud grinding, squealing, or rattling noise from pump area when jets are on.
Pump Bearing or Impeller Damage
Symptom
Salt system (Spa Boy/Onzen) shows low output and cannot maintain sanitizer level, but no specific code is shown.
Reduced Salt Cell Efficiency
Symptom
Spa base or surrounding ground is sinking or uneven, causing the spa to be out of level.
Foundation or Support Failure
Symptom
Spa has weak jet pressure or some jets barely flow.
Reduced Jet Flow
Symptom
Spa is leaking water inside the cabinet or around the base.
Plumbing or Component Leak
Symptom
Spa lights do not work or only some LEDs illuminate.
LED Lighting Circuit Failure
Symptom
Spa shell has visible cracks, blisters, or soft spots.
Acrylic Shell Damage
Symptom
Spa trips the GFCI breaker immediately or shortly after turning on.
Ground Fault or Short Circuit
Symptom
Spa water is cloudy, foamy, or has a strong odor despite normal operation.
Water Quality Degradation
Symptom
Spa will not heat, water stays cold even though pumps run and no error code is displayed.
No Heat Without Error Code
Symptom
Strong chemical or plastic smell from equipment bay, sometimes with discoloration on components.
Overheating Component or Electrical Burn
Symptom
Topside control panel is blank or intermittently turns off and on.
Topside Power or Communication Failure
| Error Code | Symptom | Fault Type | Guide |
|---|---|---|---|
| CHEM |
Display shows CHEM, LOW CHEM, or similar; integrated chemical management system indicates an issue.
|
Chemical Management or Salt System Fault | View Details |
| COL |
Display shows COL or COOL, heater does not run and spa may run pumps periodically; water is below set temperature.
|
Cold Water Protection / Cool Condition | View Details |
| DR |
Display shows DR or DRY, heater is disabled; spa may attempt to start and then shut down with this code.
|
Dry Fire Protection / Low Water in Heater | View Details |
| DY |
Display shows DY or DRY YET, often following a DR code; spa may lock out heater.
|
Dry Heater Lockout After Repeated Dry Condition | View Details |
| ECON |
Display shows ECON or EC, spa does not heat continuously and may not reach set temperature during heavy use.
|
Economy Heating Mode Enabled | View Details |
| FIL |
Display shows FIL ERR or FLTR, filtration cycle does not run as expected or spa indicates filter error.
|
Filtration Cycle or Filter Monitoring Fault | View Details |
| FLC |
Control panel displays FLC (flow closed) even though water appears to be circulating; heater will not engage.
|
Flow Switch Stuck Closed or Shorted | View Details |
| FLO |
Control panel displays FLO or FL, pumps will not run or heater will not turn on, spa may shut down shortly after startup.
|
Low or No Water Flow Through Heater | View Details |
| HL |
Control panel shows HL or HLo, spa shuts down heater and sometimes pumps; water may feel extremely hot near heater outlet.
|
High Limit Overheat Trip | View Details |
| Htr |
Display shows HTR ERR or Htr, heater does not turn on even though pumps run and temperature is below set point.
|
Heater Circuit Failure | View Details |
| ICE |
Display shows ICE or FR, pumps may run automatically even when spa is not in use; heater may cycle frequently.
|
Freeze Protection Mode Active | View Details |
| LOC |
Display shows LOC or PANEL LOCK, buttons on the topside control do not respond.
|
Topside Control Panel Lockout | View Details |
| O3 |
Display shows O3 ERR or OZONE, ozone indicator off; ozone generator not running.
|
Ozone Generator Fault | View Details |
| OH |
Display shows OH or OHH, spa shuts down all functions; water in the tub feels very hot (often above 40–42°C / 104–108°F).
|
Spa Water Overheat Condition | View Details |
| P1 |
Display shows P1 ERROR or P1 FAIL, first jet pump does not start or trips immediately.
|
Pump 1 Circuit or Motor Fault | View Details |
| P2 |
Display shows P2 ERROR or P2 FAIL, second jet pump does not run or trips breaker when activated.
|
Pump 2 Circuit or Motor Fault | View Details |
| PF |
Display shows PF or PFAIL, spa will not start normal operation after power is restored.
|
Power Failure or Line Voltage Error | View Details |
| Prr |
Display shows PRR or Prr, pumps may not start correctly after power-up; spa may be stuck in priming mode.
|
Pump Priming Error | View Details |
| SE |
Display shows SE or SEr, spa may behave erratically or not respond to button presses.
|
Software or EEPROM Error | View Details |
| SN1 |
Display shows SN1 or SENSOR1, spa may not heat or may shut down; temperature reading may be erratic or show dashes.
|
Primary Temperature Sensor Failure | View Details |
| SN2 |
Display shows SN2 or SENSOR2, spa may run but heater may be disabled or behave erratically.
|
Secondary or High-Limit Sensor Failure | View Details |
| UV |
Display shows UV ERR or UV, UV indicator light off; water treatment system not operating.
|
UV Sanitizer System Fault | View Details |
| – |
Air blower (if equipped) does not turn on or is very weak.
|
Air Blower Failure or Restriction | View Details |
| – |
Air controls (venturi knobs) do not change jet intensity or suck in air.
|
Air Control or Venturi Blockage | View Details |
| – |
Cabinet panels are warped, rotting, or coming loose.
|
Cabinet Structural Degradation | View Details |
| – |
Cover lifter or spa cover is difficult to open/close and does not seal properly.
|
Cover and Lifter Mechanical Wear | View Details |
| – |
Diverter valve is hard to turn or leaks water around the handle.
|
Diverter Valve Seal Wear or Obstruction | View Details |
| – |
Loud grinding, squealing, or rattling noise from pump area when jets are on.
|
Pump Bearing or Impeller Damage | View Details |
| – |
Salt system (Spa Boy/Onzen) shows low output and cannot maintain sanitizer level, but no specific code is shown.
|
Reduced Salt Cell Efficiency | View Details |
| – |
Spa base or surrounding ground is sinking or uneven, causing the spa to be out of level.
|
Foundation or Support Failure | View Details |
| – |
Spa has weak jet pressure or some jets barely flow.
|
Reduced Jet Flow | View Details |
| – |
Spa is leaking water inside the cabinet or around the base.
|
Plumbing or Component Leak | View Details |
| – |
Spa lights do not work or only some LEDs illuminate.
|
LED Lighting Circuit Failure | View Details |
| – |
Spa shell has visible cracks, blisters, or soft spots.
|
Acrylic Shell Damage | View Details |
| – |
Spa trips the GFCI breaker immediately or shortly after turning on.
|
Ground Fault or Short Circuit | View Details |
| – |
Spa water is cloudy, foamy, or has a strong odor despite normal operation.
|
Water Quality Degradation | View Details |
| – |
Spa will not heat, water stays cold even though pumps run and no error code is displayed.
|
No Heat Without Error Code | View Details |
| – |
Strong chemical or plastic smell from equipment bay, sometimes with discoloration on components.
|
Overheating Component or Electrical Burn | View Details |
| – |
Topside control panel is blank or intermittently turns off and on.
|
Topside Power or Communication Failure | View Details |
No matching codes found
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