American Whirlpool
American Whirlpool 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 and heater does not run even though set temperature is higher
Cool Condition / Water Below Minimum Heating Threshold
dr
Display shows dr or DR and spa shuts down heater with a low-flow or dry-fire warning
Dry Heater or Very Low Flow Detected
dY
Display shows dY or DY and spa will not heat properly after a refill
Dry Heater Lockout After Repeated Dry Conditions
EC
Display shows EC or ECO and spa heats slowly or not to the expected temperature
Energy-Saving / Economy Heating Mode Active
Er1
Display shows Er1 or ERR1 and spa will not start normal operation
General Sensor or Configuration Error
Er2
Display shows Er2 or ERR2 and spa may not heat or may shut down pumps
Heater Circuit or Relay Error
Er3
Display shows Er3 or ERR3 and one or more pumps will not run
Pump Relay or Pump Circuit Error
Er4
Display shows Er4 or ERR4 and ozone or auxiliary devices do not operate
Auxiliary Output or Ozone Circuit Error
Er5
Display shows Er5 or ERR5 and lights or audio features malfunction
Lighting / Audio Low-Voltage Circuit Error
FL2
Display shows FL2 or FLO2 and spa may run pumps but heater remains off
Flow Switch Stuck Closed or Shorted
FLO
Display shows FLO or FL1 and heater will not turn on; may show intermittent flow errors
Insufficient Water Flow Through Heater / Flow Switch Open
HL
Display shows HL or HLo and spa stops heating, sometimes with pumps still running
High-Limit Trip Due to Low Flow or Localized Overheating
ICE
Display shows ICE or IC and pumps run unexpectedly in cold weather
Freeze Protection Mode Active
LOC
Display shows LOC or lock icon and buttons do not respond
Control Panel Lock / Child Lock Enabled
OH
Display shows OH or OHH and spa shuts down with pumps off and heater disabled
Overheat Condition Detected
OHt
Display shows OHt or OHT and spa shuts down heater and pumps intermittently
Overheat at Heater Tube or Control Pack
PF
Display shows PF or PFL and spa will not start; may reset repeatedly
Power Failure or Line Voltage Error
Prr
Display shows Prr or PR and spa may not heat or may shut down unexpectedly
Pressure Switch or Pressure Sensor Fault
PSo
Display shows PSo or PSO and spa will not start heater cycle
Pressure Switch Open When It Should Be Closed
SE
Display shows SE or SEn and spa may operate erratically or ignore button presses
Sensor or Control Panel Communication Error
SLP
Display shows SLP or SL and spa temperature drops significantly between cycles
Sleep / Low-Heat Mode Enabled
Sn1
Control panel displays Sn1 and spa will not heat or shows incorrect water temperature
Water Temperature Sensor (Thermistor) Failure
Sn2
Control panel displays Sn2 and spa may shut down or ignore temperature settings
High-Limit Temperature Sensor Failure
Symptom
Air blower does not turn on or shuts off quickly after starting
Air Blower Motor or Overheat Protection Trip
Symptom
Circulation pump is not running; water surface is still and heater will not operate
Circulation Pump Failure
Symptom
Excessive vibration or rattling from spa cabinet when pumps are running
Pump Mounting or Plumbing Support Issue
Symptom
Jet pump hums but does not start; may trip breaker after a few seconds
Seized Pump Motor or Failed Start Capacitor
Symptom
Jet pump runs but jets are weak or no water comes out
Air Lock or Flow Restriction in Jet Plumbing
Symptom
Ozone generator indicator is on but sanitizer demand is high and water quality is poor
Ozone Generator Underperformance or Failure
Symptom
Some buttons on the topside control panel do not work or activate wrong functions
Keypad Matrix Failure or Moisture Intrusion
Symptom
Spa heats very slowly or cannot reach set temperature in cold weather
Insufficient Heating Capacity or Heat Loss
Symptom
Spa is leaking water from equipment bay area
Plumbing or Component Seal Leak
Symptom
Spa makes loud grinding or squealing noise from pump area during operation
Worn Pump Bearings or Cavitation
Symptom
Spa trips the GFCI breaker immediately or shortly after turning on
Ground Fault or Short Circuit
Symptom
Spa water has strong chemical or musty odor despite normal operation
Water Quality and Sanitation Imbalance
Symptom
Spa water is cloudy or foamy even with correct temperature and circulation
Suspended Solids and Surfactants in Water
Symptom
Spa will not heat; water stays cold even though pumps run and set temperature is high
Heater Element or Heater Relay Failure
Symptom
Topside control panel is completely dead; no display or button response
No Low-Voltage Power to Control Panel
Symptom
Underwater LED lights do not work or flicker intermittently
LED Lighting Circuit or Driver Failure
Symptom
Water leaking from around jets in the spa shell
Jet Body or Gasket Leak
Symptom
Water temperature fluctuates noticeably during use; gets too hot or too cool
Temperature Regulation or Sensor Placement Issue
| Error Code | Symptom | Fault Type | Guide |
|---|---|---|---|
| COOL |
Display shows COOL and heater does not run even though set temperature is higher
|
Cool Condition / Water Below Minimum Heating Threshold | View Details |
| dr |
Display shows dr or DR and spa shuts down heater with a low-flow or dry-fire warning
|
Dry Heater or Very Low Flow Detected | View Details |
| dY |
Display shows dY or DY and spa will not heat properly after a refill
|
Dry Heater Lockout After Repeated Dry Conditions | View Details |
| EC |
Display shows EC or ECO and spa heats slowly or not to the expected temperature
|
Energy-Saving / Economy Heating Mode Active | View Details |
| Er1 |
Display shows Er1 or ERR1 and spa will not start normal operation
|
General Sensor or Configuration Error | View Details |
| Er2 |
Display shows Er2 or ERR2 and spa may not heat or may shut down pumps
|
Heater Circuit or Relay Error | View Details |
| Er3 |
Display shows Er3 or ERR3 and one or more pumps will not run
|
Pump Relay or Pump Circuit Error | View Details |
| Er4 |
Display shows Er4 or ERR4 and ozone or auxiliary devices do not operate
|
Auxiliary Output or Ozone Circuit Error | View Details |
| Er5 |
Display shows Er5 or ERR5 and lights or audio features malfunction
|
Lighting / Audio Low-Voltage Circuit Error | View Details |
| FL2 |
Display shows FL2 or FLO2 and spa may run pumps but heater remains off
|
Flow Switch Stuck Closed or Shorted | View Details |
| FLO |
Display shows FLO or FL1 and heater will not turn on; may show intermittent flow errors
|
Insufficient Water Flow Through Heater / Flow Switch Open | View Details |
| HL |
Display shows HL or HLo and spa stops heating, sometimes with pumps still running
|
High-Limit Trip Due to Low Flow or Localized Overheating | View Details |
| ICE |
Display shows ICE or IC and pumps run unexpectedly in cold weather
|
Freeze Protection Mode Active | View Details |
| LOC |
Display shows LOC or lock icon and buttons do not respond
|
Control Panel Lock / Child Lock Enabled | View Details |
| OH |
Display shows OH or OHH and spa shuts down with pumps off and heater disabled
|
Overheat Condition Detected | View Details |
| OHt |
Display shows OHt or OHT and spa shuts down heater and pumps intermittently
|
Overheat at Heater Tube or Control Pack | View Details |
| PF |
Display shows PF or PFL and spa will not start; may reset repeatedly
|
Power Failure or Line Voltage Error | View Details |
| Prr |
Display shows Prr or PR and spa may not heat or may shut down unexpectedly
|
Pressure Switch or Pressure Sensor Fault | View Details |
| PSo |
Display shows PSo or PSO and spa will not start heater cycle
|
Pressure Switch Open When It Should Be Closed | View Details |
| SE |
Display shows SE or SEn and spa may operate erratically or ignore button presses
|
Sensor or Control Panel Communication Error | View Details |
| SLP |
Display shows SLP or SL and spa temperature drops significantly between cycles
|
Sleep / Low-Heat Mode Enabled | View Details |
| Sn1 |
Control panel displays Sn1 and spa will not heat or shows incorrect water temperature
|
Water Temperature Sensor (Thermistor) Failure | View Details |
| Sn2 |
Control panel displays Sn2 and spa may shut down or ignore temperature settings
|
High-Limit Temperature Sensor Failure | View Details |
| – |
Air blower does not turn on or shuts off quickly after starting
|
Air Blower Motor or Overheat Protection Trip | View Details |
| – |
Circulation pump is not running; water surface is still and heater will not operate
|
Circulation Pump Failure | View Details |
| – |
Excessive vibration or rattling from spa cabinet when pumps are running
|
Pump Mounting or Plumbing Support Issue | View Details |
| – |
Jet pump hums but does not start; may trip breaker after a few seconds
|
Seized Pump Motor or Failed Start Capacitor | View Details |
| – |
Jet pump runs but jets are weak or no water comes out
|
Air Lock or Flow Restriction in Jet Plumbing | View Details |
| – |
Ozone generator indicator is on but sanitizer demand is high and water quality is poor
|
Ozone Generator Underperformance or Failure | View Details |
| – |
Some buttons on the topside control panel do not work or activate wrong functions
|
Keypad Matrix Failure or Moisture Intrusion | View Details |
| – |
Spa heats very slowly or cannot reach set temperature in cold weather
|
Insufficient Heating Capacity or Heat Loss | View Details |
| – |
Spa is leaking water from equipment bay area
|
Plumbing or Component Seal Leak | View Details |
| – |
Spa makes loud grinding or squealing noise from pump area during operation
|
Worn Pump Bearings or Cavitation | View Details |
| – |
Spa trips the GFCI breaker immediately or shortly after turning on
|
Ground Fault or Short Circuit | View Details |
| – |
Spa water has strong chemical or musty odor despite normal operation
|
Water Quality and Sanitation Imbalance | View Details |
| – |
Spa water is cloudy or foamy even with correct temperature and circulation
|
Suspended Solids and Surfactants in Water | View Details |
| – |
Spa will not heat; water stays cold even though pumps run and set temperature is high
|
Heater Element or Heater Relay Failure | View Details |
| – |
Topside control panel is completely dead; no display or button response
|
No Low-Voltage Power to Control Panel | View Details |
| – |
Underwater LED lights do not work or flicker intermittently
|
LED Lighting Circuit or Driver Failure | View Details |
| – |
Water leaking from around jets in the spa shell
|
Jet Body or Gasket Leak | View Details |
| – |
Water temperature fluctuates noticeably during use; gets too hot or too cool
|
Temperature Regulation or Sensor Placement Issue | View Details |
No matching codes found
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