Nordic Hot Tubs
Nordic Hot Tubs 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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COL
Display shows COL or COOL; spa will not heat until water warms up.
Cold Water Protection / Freeze or Cold Start Mode
dr
Display shows dr or DRY; heater shuts down and spa may not heat.
Dry Fire Protection / Heater Not Primed
dy
Display shows dy or DRY Y; heater disabled due to repeated dry conditions.
Persistent Dry Fire Condition
dY
Display shows dY or DYNA; spa cycles pumps frequently and may not reach set temperature.
Dynamic Thermal Load / Low Voltage or Load Shedding
FLC
Display shows FLC or FLOC; heater may shut down intermittently.
Flow Switch Closed When It Should Be Open
FLO
Display shows FLO or FL and heater will not turn on; sometimes pumps run but no heat.
Low Water Flow / Flow Switch Open
HL
Control panel shows HL or HOT and spa stops heating; pumps may still run.
High-Limit Sensor Trip
Htr
Display shows Htr ERR or HEATER ERROR; spa does not heat.
Heater Circuit Failure
ICE
Display shows ICE or FR; pumps run automatically even when spa is not in use.
Freeze Protection Mode
LOC
Display shows LOC or LOCK; buttons on the topside control panel do not respond.
Panel Lock / Child Lock Activated
OH
Control panel displays OH and spa shuts down; water feels extremely hot or above set temperature.
Overheat Protection Trip
P1
Display shows P1 ERR or P1 FAIL; pump 1 does not run or trips breaker.
Pump 1 Circuit Failure
P2
Display shows P2 ERR or P2 FAIL; pump 2 does not run or behaves erratically.
Pump 2 Circuit Failure
PF
Display shows PF or PFAIL; spa shuts down or reboots unexpectedly.
Power Failure / Voltage Supply Error
Prr
Display shows Prr or PR; spa may not heat and may run pumps unexpectedly.
Priming Mode / Pump Priming Routine
SE
Display shows SE or SENSOR; spa may shut down or heat erratically.
General Sensor Error
Sn1
Display shows Sn1 or SENS1; spa may not heat or may shut down.
Temperature Sensor 1 Failure (Water Temp Sensor)
Sn2
Display shows Sn2 or SENS2; spa may shut down heating or show incorrect temperature.
High-Limit or Secondary Sensor Failure
Symptom
Blower (air pump) does not turn on or shuts off quickly (on models with air blower).
Air Blower Failure or Overheat
Symptom
Cover straps or clips are broken, and cover does not seal properly.
Cover Retention and Seal Failure
Symptom
Jets are weak or some seats have very little water pressure.
Reduced Jet Flow
Symptom
One or more jets do not work at all while others are fine.
Individual Jet Blockage or Failure
Symptom
Ozone generator indicator is off and no ozone bubbles are visible (on models equipped with ozone).
Ozone System Failure
Symptom
Spa cabinet or shell vibrates excessively when jets are on high speed.
Excessive Vibration
Symptom
Spa heats very slowly or cannot reach set temperature, especially in cold weather.
Insufficient Heating Performance
Symptom
Spa is excessively noisy during operation (grinding, squealing, or rattling).
Mechanical Noise from Pump or Blower
Symptom
Spa is leaking water inside the equipment bay or from under the cabinet.
Plumbing or Component Leak
Symptom
Spa lights do not turn on, but all other functions work.
LED Lighting Circuit Failure
Symptom
Spa makes loud humming noise from pump area but jets do not move water.
Seized Pump Motor or Air-Locked Pump
Symptom
Spa trips the GFCI breaker immediately or shortly after turning on.
Ground Fault or Short Circuit
Symptom
Spa water has a persistent musty or moldy odor.
Biofilm and Organic Contamination
Symptom
Spa water has a strong burning or electrical smell near the equipment bay.
Overheating Electrical Component
Symptom
Spa water is cloudy and does not clear with normal filtration.
Suspended Particles / Poor Filtration
Symptom
Spa water is foamy when jets are on.
Excessive Foam Formation
Symptom
Spa will not heat; water stays cold even though pumps run and no error code is displayed.
No-Heat Condition Without Error
Symptom
Topside control panel display is dim, flickering, or missing segments.
Display Degradation or Low Voltage to Panel
Symptom
Topside control panel is completely dead; no display or button response.
No Power to Control Panel
Symptom
Water is leaking from around a specific jet or fitting in the spa shell.
Jet Body or Gasket Leak
| Error Code | Symptom | Fault Type | Guide |
|---|---|---|---|
| COL |
Display shows COL or COOL; spa will not heat until water warms up.
|
Cold Water Protection / Freeze or Cold Start Mode | View Details |
| dr |
Display shows dr or DRY; heater shuts down and spa may not heat.
|
Dry Fire Protection / Heater Not Primed | View Details |
| dy |
Display shows dy or DRY Y; heater disabled due to repeated dry conditions.
|
Persistent Dry Fire Condition | View Details |
| dY |
Display shows dY or DYNA; spa cycles pumps frequently and may not reach set temperature.
|
Dynamic Thermal Load / Low Voltage or Load Shedding | View Details |
| FLC |
Display shows FLC or FLOC; heater may shut down intermittently.
|
Flow Switch Closed When It Should Be Open | View Details |
| FLO |
Display shows FLO or FL and heater will not turn on; sometimes pumps run but no heat.
|
Low Water Flow / Flow Switch Open | View Details |
| HL |
Control panel shows HL or HOT and spa stops heating; pumps may still run.
|
High-Limit Sensor Trip | View Details |
| Htr |
Display shows Htr ERR or HEATER ERROR; spa does not heat.
|
Heater Circuit Failure | View Details |
| ICE |
Display shows ICE or FR; pumps run automatically even when spa is not in use.
|
Freeze Protection Mode | View Details |
| LOC |
Display shows LOC or LOCK; buttons on the topside control panel do not respond.
|
Panel Lock / Child Lock Activated | View Details |
| OH |
Control panel displays OH and spa shuts down; water feels extremely hot or above set temperature.
|
Overheat Protection Trip | View Details |
| P1 |
Display shows P1 ERR or P1 FAIL; pump 1 does not run or trips breaker.
|
Pump 1 Circuit Failure | View Details |
| P2 |
Display shows P2 ERR or P2 FAIL; pump 2 does not run or behaves erratically.
|
Pump 2 Circuit Failure | View Details |
| PF |
Display shows PF or PFAIL; spa shuts down or reboots unexpectedly.
|
Power Failure / Voltage Supply Error | View Details |
| Prr |
Display shows Prr or PR; spa may not heat and may run pumps unexpectedly.
|
Priming Mode / Pump Priming Routine | View Details |
| SE |
Display shows SE or SENSOR; spa may shut down or heat erratically.
|
General Sensor Error | View Details |
| Sn1 |
Display shows Sn1 or SENS1; spa may not heat or may shut down.
|
Temperature Sensor 1 Failure (Water Temp Sensor) | View Details |
| Sn2 |
Display shows Sn2 or SENS2; spa may shut down heating or show incorrect temperature.
|
High-Limit or Secondary Sensor Failure | View Details |
| – |
Blower (air pump) does not turn on or shuts off quickly (on models with air blower).
|
Air Blower Failure or Overheat | View Details |
| – |
Cover straps or clips are broken, and cover does not seal properly.
|
Cover Retention and Seal Failure | View Details |
| – |
Jets are weak or some seats have very little water pressure.
|
Reduced Jet Flow | View Details |
| – |
One or more jets do not work at all while others are fine.
|
Individual Jet Blockage or Failure | View Details |
| – |
Ozone generator indicator is off and no ozone bubbles are visible (on models equipped with ozone).
|
Ozone System Failure | View Details |
| – |
Spa cabinet or shell vibrates excessively when jets are on high speed.
|
Excessive Vibration | View Details |
| – |
Spa heats very slowly or cannot reach set temperature, especially in cold weather.
|
Insufficient Heating Performance | View Details |
| – |
Spa is excessively noisy during operation (grinding, squealing, or rattling).
|
Mechanical Noise from Pump or Blower | View Details |
| – |
Spa is leaking water inside the equipment bay or from under the cabinet.
|
Plumbing or Component Leak | View Details |
| – |
Spa lights do not turn on, but all other functions work.
|
LED Lighting Circuit Failure | View Details |
| – |
Spa makes loud humming noise from pump area but jets do not move water.
|
Seized Pump Motor or Air-Locked Pump | View Details |
| – |
Spa trips the GFCI breaker immediately or shortly after turning on.
|
Ground Fault or Short Circuit | View Details |
| – |
Spa water has a persistent musty or moldy odor.
|
Biofilm and Organic Contamination | View Details |
| – |
Spa water has a strong burning or electrical smell near the equipment bay.
|
Overheating Electrical Component | View Details |
| – |
Spa water is cloudy and does not clear with normal filtration.
|
Suspended Particles / Poor Filtration | View Details |
| – |
Spa water is foamy when jets are on.
|
Excessive Foam Formation | View Details |
| – |
Spa will not heat; water stays cold even though pumps run and no error code is displayed.
|
No-Heat Condition Without Error | View Details |
| – |
Topside control panel display is dim, flickering, or missing segments.
|
Display Degradation or Low Voltage to Panel | View Details |
| – |
Topside control panel is completely dead; no display or button response.
|
No Power to Control Panel | View Details |
| – |
Water is leaking from around a specific jet or fitting in the spa shell.
|
Jet Body or Gasket Leak | View Details |
No matching codes found
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