Hot Spring
Hot Spring 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”; spa will not heat and may run pumps to cool water.
Cold Water Protection / Freeze Condition Detected
COOL
Display shows “COOL”; spa is below set temperature and heater may be disabled temporarily.
Low Temperature / Cool Condition
dr
Control panel displays “dr” and spa will not heat; circulation pump may run briefly then stop.
Low Water / Dry Fire Protection
drY
Control panel shows “drY”; heater is disabled and spa will not heat.
Dry Heater / Overheat Protection
DRY
Display shows “DRY”; heater disabled, spa not heating.
Dry Heater Detected
FLO
Display shows “FLO” or “FLO2”; heater disabled, jets may still operate.
Insufficient Water Flow Through Heater
FLO2
Display shows “FLO2”; spa may shut down or heater disabled.
Secondary Flow Fault / Heater Flow Switch Error
GFCI
Spa display is off; GFCI breaker or outlet trips immediately or shortly after turning on.
Ground Fault / Electrical Leakage
HFL
Display shows “HFL”; spa may shut down heater intermittently.
Heater Flow Low (Intermittent)
HL
Display shows “HL”; spa may shut down heater and/or pumps.
High-Limit Trip (Non-Latching)
ICE
Display shows “ICE”; pumps may run automatically even when spa is “off”.
Freeze Protection Mode
LF
Display shows “LF”; spa shuts down heater after extended low-flow condition.
Persistent Low Flow Lockout
LOC
Display shows “LOC” or lock icon; buttons do not respond.
Control Panel Lockout (User Lock)
OH
Control panel displays “OH” or “OHH”; spa shuts down and may beep; water feels very hot.
Spa Overheat Condition
OHH
Display shows “OHH”; spa shuts down completely; may not respond to controls until cooled.
High-High Overheat Trip
Prr
Display shows “Prr” or “PR”; spa may be in priming mode and not heating.
Priming Mode / Pump Prime Error
SN
Display shows “SN”, “SN1”, or “SN2”; spa may not heat or may shut down.
Sensor Fault (Temperature or High-Limit Thermistor)
SN1
Display shows “SN1”; spa may not heat or may behave erratically with temperature.
Water Temperature Sensor Failure
SN2
Display shows “SN2”; spa may shut down or show OH/OHH intermittently.
High-Limit Sensor Failure
— (no power)
No lights or display on control panel; spa appears completely dead.
No Power / Main Supply Failure
— —
Display shows two dashes or blank segments; buttons may not respond.
Control Panel Communication Fault
— — —
Display shows three dashes or “---”; spa is unresponsive or will not heat.
Sensor Out of Range / Communication Error
Symptom
Air bubbles constantly stream from heater return or jets even when air controls are closed.
Air Leak on Suction Side / Venturi Issue
Symptom
Circulation pump is noisy, rattling, or not moving water; heater errors like FLO or LF appear.
Circulation Pump Mechanical Failure
Symptom
Jets do not run at all; pressing jet buttons has no effect, but control panel is powered.
Jet Pump Failure / Control Circuit Fault
Symptom
Jets run but are weak or uneven; some seats have little to no pressure.
Reduced Jet Flow / Hydraulic Restriction
Symptom
Ozone indicator is off and water quality declines faster than normal; no bubbles from ozone injector (if visible).
Ozone Generator Failure
Symptom
Spa cabinet or equipment bay is warm even when spa is not heating; pump runs more than expected.
Pump Stuck On / Relay Failure
Symptom
Spa cover is heavy, waterlogged, and difficult to open; increased heat loss and energy use.
Waterlogged or Failed Spa Cover
Symptom
Spa is leaking water inside the equipment compartment; water visible under pumps or heater.
Internal Plumbing or Component Leak
Symptom
Spa lights do not work, but jets and heater function normally.
Lighting Circuit or LED Failure
Symptom
Spa makes loud banging or vibration noises when pumps run; cabinet panels may rattle.
Mechanical Vibration / Mounting Issue
Symptom
Spa trips the breaker only when a specific jet pump is turned on.
Shorted or Overloaded Jet Pump Circuit
Symptom
Spa water is foamy and leaves residue on the surface when jets are on.
Foaming Due to Contaminants
Symptom
Spa will not heat, but jets and lights work normally; water stays at or near ambient temperature.
Heater Not Energizing
Symptom
Strong burning or electrical smell from equipment bay; components may be hot to the touch.
Overheating Electrical Component
Symptom
Topside control panel buttons are unresponsive or only some buttons work; display may be dim or flickering.
Topside Control Panel Failure
Symptom
Water has a strong chemical or musty odor despite normal sanitizer levels.
Water Quality / Biofilm or Contamination
Symptom
Water leaking from around jets or lights in the spa shell.
Jet Body or Light Niche Seal Failure
Symptom
Water level drops slowly over days with no obvious external leak.
Hidden Plumbing Leak in Foam Insulation
| Error Code | Symptom | Fault Type | Guide |
|---|---|---|---|
| COL |
Display shows “COL”; spa will not heat and may run pumps to cool water.
|
Cold Water Protection / Freeze Condition Detected | View Details |
| COOL |
Display shows “COOL”; spa is below set temperature and heater may be disabled temporarily.
|
Low Temperature / Cool Condition | View Details |
| dr |
Control panel displays “dr” and spa will not heat; circulation pump may run briefly then stop.
|
Low Water / Dry Fire Protection | View Details |
| drY |
Control panel shows “drY”; heater is disabled and spa will not heat.
|
Dry Heater / Overheat Protection | View Details |
| DRY |
Display shows “DRY”; heater disabled, spa not heating.
|
Dry Heater Detected | View Details |
| FLO |
Display shows “FLO” or “FLO2”; heater disabled, jets may still operate.
|
Insufficient Water Flow Through Heater | View Details |
| FLO2 |
Display shows “FLO2”; spa may shut down or heater disabled.
|
Secondary Flow Fault / Heater Flow Switch Error | View Details |
| GFCI |
Spa display is off; GFCI breaker or outlet trips immediately or shortly after turning on.
|
Ground Fault / Electrical Leakage | View Details |
| HFL |
Display shows “HFL”; spa may shut down heater intermittently.
|
Heater Flow Low (Intermittent) | View Details |
| HL |
Display shows “HL”; spa may shut down heater and/or pumps.
|
High-Limit Trip (Non-Latching) | View Details |
| ICE |
Display shows “ICE”; pumps may run automatically even when spa is “off”.
|
Freeze Protection Mode | View Details |
| LF |
Display shows “LF”; spa shuts down heater after extended low-flow condition.
|
Persistent Low Flow Lockout | View Details |
| LOC |
Display shows “LOC” or lock icon; buttons do not respond.
|
Control Panel Lockout (User Lock) | View Details |
| OH |
Control panel displays “OH” or “OHH”; spa shuts down and may beep; water feels very hot.
|
Spa Overheat Condition | View Details |
| OHH |
Display shows “OHH”; spa shuts down completely; may not respond to controls until cooled.
|
High-High Overheat Trip | View Details |
| Prr |
Display shows “Prr” or “PR”; spa may be in priming mode and not heating.
|
Priming Mode / Pump Prime Error | View Details |
| SN |
Display shows “SN”, “SN1”, or “SN2”; spa may not heat or may shut down.
|
Sensor Fault (Temperature or High-Limit Thermistor) | View Details |
| SN1 |
Display shows “SN1”; spa may not heat or may behave erratically with temperature.
|
Water Temperature Sensor Failure | View Details |
| SN2 |
Display shows “SN2”; spa may shut down or show OH/OHH intermittently.
|
High-Limit Sensor Failure | View Details |
| — (no power) |
No lights or display on control panel; spa appears completely dead.
|
No Power / Main Supply Failure | View Details |
| — — |
Display shows two dashes or blank segments; buttons may not respond.
|
Control Panel Communication Fault | View Details |
| — — — |
Display shows three dashes or “---”; spa is unresponsive or will not heat.
|
Sensor Out of Range / Communication Error | View Details |
| – |
Air bubbles constantly stream from heater return or jets even when air controls are closed.
|
Air Leak on Suction Side / Venturi Issue | View Details |
| – |
Circulation pump is noisy, rattling, or not moving water; heater errors like FLO or LF appear.
|
Circulation Pump Mechanical Failure | View Details |
| – |
Jets do not run at all; pressing jet buttons has no effect, but control panel is powered.
|
Jet Pump Failure / Control Circuit Fault | View Details |
| – |
Jets run but are weak or uneven; some seats have little to no pressure.
|
Reduced Jet Flow / Hydraulic Restriction | View Details |
| – |
Ozone indicator is off and water quality declines faster than normal; no bubbles from ozone injector (if visible).
|
Ozone Generator Failure | View Details |
| – |
Spa cabinet or equipment bay is warm even when spa is not heating; pump runs more than expected.
|
Pump Stuck On / Relay Failure | View Details |
| – |
Spa cover is heavy, waterlogged, and difficult to open; increased heat loss and energy use.
|
Waterlogged or Failed Spa Cover | View Details |
| – |
Spa is leaking water inside the equipment compartment; water visible under pumps or heater.
|
Internal Plumbing or Component Leak | View Details |
| – |
Spa lights do not work, but jets and heater function normally.
|
Lighting Circuit or LED Failure | View Details |
| – |
Spa makes loud banging or vibration noises when pumps run; cabinet panels may rattle.
|
Mechanical Vibration / Mounting Issue | View Details |
| – |
Spa trips the breaker only when a specific jet pump is turned on.
|
Shorted or Overloaded Jet Pump Circuit | View Details |
| – |
Spa water is foamy and leaves residue on the surface when jets are on.
|
Foaming Due to Contaminants | View Details |
| – |
Spa will not heat, but jets and lights work normally; water stays at or near ambient temperature.
|
Heater Not Energizing | View Details |
| – |
Strong burning or electrical smell from equipment bay; components may be hot to the touch.
|
Overheating Electrical Component | View Details |
| – |
Topside control panel buttons are unresponsive or only some buttons work; display may be dim or flickering.
|
Topside Control Panel Failure | View Details |
| – |
Water has a strong chemical or musty odor despite normal sanitizer levels.
|
Water Quality / Biofilm or Contamination | View Details |
| – |
Water leaking from around jets or lights in the spa shell.
|
Jet Body or Light Niche Seal Failure | View Details |
| – |
Water level drops slowly over days with no obvious external leak.
|
Hidden Plumbing Leak in Foam Insulation | View Details |
No matching codes found
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