Dynasty Spas
Dynasty 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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COOL
Display shows COOL, water temperature is significantly below setpoint and heater may be limited.
Cold Water Protection / Freeze or Cool Condition
dr
Display shows dr or DR, heater will not run and spa may not heat.
Dry Heater / Insufficient Water in Heater Tube
drY
Display shows drY or DRY, indicating the heater is running without adequate water flow.
Dry Fire Protection / Heater Starved of Water
EC
Display shows EC or ECO, spa heats less frequently and may not maintain high temperature.
Economy Heating Mode Active
FLC
Display shows FLC (flow closed) even when the pump is off, or heater will not engage and spa will not heat.
Flow Switch Stuck Closed / Shorted
FLO
Display shows FLO or FL, jets may not run, heater will not turn on, and the spa may shut down after a short period.
Low Water Flow / Flow Switch Open
GFCI
Display may be blank; external GFCI breaker trips immediately or shortly after turning on the spa.
Ground Fault / Leakage Current Detected
HL
Display shows HL or HLt, spa may shut down heater but pumps can still run.
High Limit Sensor Trip (Localized Overheat)
HLd
Display shows HLd or HLdY, spa may limit heater operation but still run pumps.
Heater Limit Derate / Overheat Protection Active
ICE
Display shows ICE or IC, pumps may 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
Display shows OH or OHH, spa shuts down, jets may stop, and water feels excessively hot near the heater outlet.
Overheat Condition / High Limit Trip
OHH
Display shows OHH and spa immediately shuts down heating and pumps to protect from extreme overheat.
Extreme Overheat / High Limit Lockout
PF
Display shows PF or PFL, spa may not start or may reset unexpectedly.
Power Failure / Low Line Voltage Detected
Prr
Display shows Prr or PR, spa may not heat and pumps may be limited.
Pressure Switch or Pressure-Related Error
PSo
Display shows PSo or PSO, indicating pressure switch open when it should be closed.
Pressure Switch Open Fault
SE
Display shows SE or SEr, spa may not respond to keypad inputs or may behave erratically.
Sensor or Software Error
SLP
Display shows SLP or SLEEP, water temperature drops between filter cycles.
Sleep Heating Mode Active
Sn
Display shows generic Sn, SNS, or SENSOR error, spa may not heat or may shut down.
General Sensor Fault
Sn1
Display shows Sn1 or SN1, spa may not heat or may shut down heating cycle.
Water Temperature Sensor Error
Sn2
Display shows Sn2 or SN2, spa may shut down heater or display incorrect water temperature.
High Limit Sensor Error
Sn3
Display shows Sn3 or SN3, spa may behave erratically or shut down certain functions.
Auxiliary Sensor Error (Cabinet/Air/Other)
Symptom
Acrid or burning electrical smell coming from the equipment bay.
Overheating Electrical Component
Symptom
Air blower runs but produces very little air through the air jets.
Air Blower Flow Restriction
Symptom
Circulation pump is not running; water at heater return is still and spa may not heat.
Circulation Pump Failure
Symptom
Jets are weak or have very little pressure even though the pump is running.
Restricted Water Flow / Jet Performance Issue
Symptom
Main jet pump hums but does not start; no water movement from jets.
Jet Pump Motor Seized or Capacitor Failure
Symptom
Ozone indicator is on but there is no visible ozone bubbles or smell at the ozone injection point.
Ozonator Failure
Symptom
Spa heats very slowly or cannot reach set temperature, especially in cold weather.
Insufficient Heating Capacity / Heat Loss
Symptom
Spa is leaking water inside the equipment bay; puddles form under the spa.
Plumbing or Component Leak
Symptom
Spa makes loud grinding or squealing noises from the pump area when jets are on.
Pump Bearing or Wet End Failure
Symptom
Spa trips the house breaker immediately when jets are turned on, but not when only circulation is running.
Jet Pump Electrical Short
Symptom
Spa water is cloudy and does not clear even after filtration.
Suspended Solids / Poor Filtration
Symptom
Spa water is foamy when jets are on and foam persists on the surface.
Foaming Due to Contaminants
Symptom
Spa will not heat; water stays cold even though pumps run and display appears normal.
Heater Element Failure
Symptom
Strong vibration or rattling is felt through the spa cabinet when pumps run.
Pump Vibration / Mounting Issue
Symptom
Topside control panel display is dim, missing segments, or some buttons do not respond.
Topside Control Panel Failure
Symptom
Topside control panel is blank; no display or lights, but power is present at the spa disconnect.
No Power to Control Pack / Blown Fuse
Symptom
Underwater LED lights or perimeter lights do not turn on, but other spa functions work.
Spa Lighting Circuit Failure
Symptom
Water has a strong chemical or musty odor despite normal sanitizer levels.
Water Quality / Biofilm Contamination
Symptom
Water is leaking from around individual jets in the spa shell.
Jet Body or Gasket Leak
| Error Code | Symptom | Fault Type | Guide |
|---|---|---|---|
| COOL |
Display shows COOL, water temperature is significantly below setpoint and heater may be limited.
|
Cold Water Protection / Freeze or Cool Condition | View Details |
| dr |
Display shows dr or DR, heater will not run and spa may not heat.
|
Dry Heater / Insufficient Water in Heater Tube | View Details |
| drY |
Display shows drY or DRY, indicating the heater is running without adequate water flow.
|
Dry Fire Protection / Heater Starved of Water | View Details |
| EC |
Display shows EC or ECO, spa heats less frequently and may not maintain high temperature.
|
Economy Heating Mode Active | View Details |
| FLC |
Display shows FLC (flow closed) even when the pump is off, or heater will not engage and spa will not heat.
|
Flow Switch Stuck Closed / Shorted | View Details |
| FLO |
Display shows FLO or FL, jets may not run, heater will not turn on, and the spa may shut down after a short period.
|
Low Water Flow / Flow Switch Open | View Details |
| GFCI |
Display may be blank; external GFCI breaker trips immediately or shortly after turning on the spa.
|
Ground Fault / Leakage Current Detected | View Details |
| HL |
Display shows HL or HLt, spa may shut down heater but pumps can still run.
|
High Limit Sensor Trip (Localized Overheat) | View Details |
| HLd |
Display shows HLd or HLdY, spa may limit heater operation but still run pumps.
|
Heater Limit Derate / Overheat Protection Active | View Details |
| ICE |
Display shows ICE or IC, pumps may 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 |
Display shows OH or OHH, spa shuts down, jets may stop, and water feels excessively hot near the heater outlet.
|
Overheat Condition / High Limit Trip | View Details |
| OHH |
Display shows OHH and spa immediately shuts down heating and pumps to protect from extreme overheat.
|
Extreme Overheat / High Limit Lockout | View Details |
| PF |
Display shows PF or PFL, spa may not start or may reset unexpectedly.
|
Power Failure / Low Line Voltage Detected | View Details |
| Prr |
Display shows Prr or PR, spa may not heat and pumps may be limited.
|
Pressure Switch or Pressure-Related Error | View Details |
| PSo |
Display shows PSo or PSO, indicating pressure switch open when it should be closed.
|
Pressure Switch Open Fault | View Details |
| SE |
Display shows SE or SEr, spa may not respond to keypad inputs or may behave erratically.
|
Sensor or Software Error | View Details |
| SLP |
Display shows SLP or SLEEP, water temperature drops between filter cycles.
|
Sleep Heating Mode Active | View Details |
| Sn |
Display shows generic Sn, SNS, or SENSOR error, spa may not heat or may shut down.
|
General Sensor Fault | View Details |
| Sn1 |
Display shows Sn1 or SN1, spa may not heat or may shut down heating cycle.
|
Water Temperature Sensor Error | View Details |
| Sn2 |
Display shows Sn2 or SN2, spa may shut down heater or display incorrect water temperature.
|
High Limit Sensor Error | View Details |
| Sn3 |
Display shows Sn3 or SN3, spa may behave erratically or shut down certain functions.
|
Auxiliary Sensor Error (Cabinet/Air/Other) | View Details |
| – |
Acrid or burning electrical smell coming from the equipment bay.
|
Overheating Electrical Component | View Details |
| – |
Air blower runs but produces very little air through the air jets.
|
Air Blower Flow Restriction | View Details |
| – |
Circulation pump is not running; water at heater return is still and spa may not heat.
|
Circulation Pump Failure | View Details |
| – |
Jets are weak or have very little pressure even though the pump is running.
|
Restricted Water Flow / Jet Performance Issue | View Details |
| – |
Main jet pump hums but does not start; no water movement from jets.
|
Jet Pump Motor Seized or Capacitor Failure | View Details |
| – |
Ozone indicator is on but there is no visible ozone bubbles or smell at the ozone injection point.
|
Ozonator Failure | View Details |
| – |
Spa heats very slowly or cannot reach set temperature, especially in cold weather.
|
Insufficient Heating Capacity / Heat Loss | View Details |
| – |
Spa is leaking water inside the equipment bay; puddles form under the spa.
|
Plumbing or Component Leak | View Details |
| – |
Spa makes loud grinding or squealing noises from the pump area when jets are on.
|
Pump Bearing or Wet End Failure | View Details |
| – |
Spa trips the house breaker immediately when jets are turned on, but not when only circulation is running.
|
Jet Pump Electrical Short | View Details |
| – |
Spa water is cloudy and does not clear even after filtration.
|
Suspended Solids / Poor Filtration | View Details |
| – |
Spa water is foamy when jets are on and foam persists on the surface.
|
Foaming Due to Contaminants | View Details |
| – |
Spa will not heat; water stays cold even though pumps run and display appears normal.
|
Heater Element Failure | View Details |
| – |
Strong vibration or rattling is felt through the spa cabinet when pumps run.
|
Pump Vibration / Mounting Issue | View Details |
| – |
Topside control panel display is dim, missing segments, or some buttons do not respond.
|
Topside Control Panel Failure | View Details |
| – |
Topside control panel is blank; no display or lights, but power is present at the spa disconnect.
|
No Power to Control Pack / Blown Fuse | View Details |
| – |
Underwater LED lights or perimeter lights do not turn on, but other spa functions work.
|
Spa Lighting Circuit Failure | View Details |
| – |
Water has a strong chemical or musty odor despite normal sanitizer levels.
|
Water Quality / Biofilm Contamination | View Details |
| – |
Water is leaking from around individual jets in the spa shell.
|
Jet Body or Gasket Leak | View Details |
No matching codes found
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