Aquaterra Spas
Aquaterra 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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COd
Display shows COd or COLD, spa may run pumps but not heat normally.
Cold Water Protection / Cold Start Mode
COL
Display shows COL or COOL, heater does not run, spa may run pumps to circulate water.
Cool Condition / Water Below Set Threshold
dr
Control panel shows dr or DR, spa may shut down heating cycle, jets may still operate but heater is disabled.
Dry Fire Protection / Inadequate Water in Heater
drY
Display shows drY or DRY, spa shuts down heater immediately.
Dry Heater Detected / No Water in Heater
dy
Control panel displays dy or DY, spa stops heating and may shut down temporarily.
Dry Heater Detected / Overheat Due to Low Flow
Er1
Display shows Er1 or ERR1, spa functions may be limited or shut down.
Topside Control Panel Communication Error
Er2
Display shows Er2 or ERR2, some or all buttons may not respond.
Keypad Button Stuck or Shorted
Er3
Display shows Er3 or ERR3, spa may shut down or behave erratically.
Internal Control Board Error
Er4
Display shows Er4 or ERR4, heater and pumps may be disabled.
Heater Relay or Current Sense Error
FLO
Control panel displays FLO or FL, jets may not run, heater will not turn on, possible blinking light on topside control.
Low Water Flow / Flow Switch Open
HFL
Display shows HFL or Ht FLO, spa may shut down heater but pumps still operate.
Heater Flow Low / Heater Flow Protection
HL
Display shows HL or HLo, spa shuts down heater and may disable pumps until reset.
High Limit Sensor Trip / Over-Temperature at Heater
ICE
Control panel shows ICE or IC, pumps may run automatically even when spa is not in use.
Freeze Protection Mode
LF
Display shows LF or LOW FLO, spa may shut down heater after repeated low-flow detections.
Persistent Low Flow Condition
LOC
Control panel displays LOC or LOCK, buttons do not respond or only limited functions work.
Panel Lock / Child Lock Activated
OH
Control panel shows OH or OHH, spa shuts down, pumps may run briefly to cool water, topside may flash an overheat warning.
Overheat Condition / High Limit Trip
PF
Display shows PF or PFAIL, spa resets unexpectedly or loses settings.
Power Failure / Low Line Voltage Detected
Prr
Display shows Prr or PR, spa may be in priming mode after power-up, pumps may run intermittently.
Priming Mode / Pump Priming Routine
SE
Display shows SE or SENSOR ERROR, spa may shut down heating.
General Sensor Error
Sn1
Control panel displays Sn1, SN1, or SENSOR 1, spa may not heat and may shut down.
Water Temperature Sensor Failure
Sn2
Control panel displays Sn2, SN2, or SENSOR 2, spa may shut down heating and show sensor error.
High Limit Sensor Failure
— —
Display shows dashes (— —) or blank temperature reading, spa may not heat.
No Temperature Data / Sensor Not Detected
Symptom
Circulation pump is noisy, rattling, or grinding during operation.
Worn Circulation Pump Bearings or Debris in Impeller
Symptom
Jets are weak or have very little pressure even though the pump is running.
Low Jet Pressure / Restricted Flow
Symptom
LED lights in the spa do not work or are stuck on one color, while other functions are normal.
LED Lighting System Failure
Symptom
Main jet pump does not start, only a humming sound is heard when jets are turned on.
Jet Pump Motor Stalled or Failed
Symptom
Ozone generator indicator is off and there is no ozone smell when the spa is circulating.
Ozone Generator Failure
Symptom
Some buttons on the topside control work, but others do nothing or respond intermittently.
Partial Keypad Failure
Symptom
Spa cabinet panels are bulging or warped, and there is moisture or mold inside the cabinet.
Chronic Moisture Intrusion / Insulation Saturation
Symptom
Spa cover is extremely heavy and waterlogged, difficult to lift, and may sag into the water.
Waterlogged Spa Cover
Symptom
Spa is leaking water from the equipment compartment area.
Plumbing or Component Leak in Equipment Bay
Symptom
Spa trips the GFCI breaker immediately or within a few seconds of turning it on.
Ground Fault / Electrical Short
Symptom
Spa water has a strong burnt plastic or electrical smell when pumps or heater run.
Overheating Electrical Component
Symptom
Spa water is foamy and has an unpleasant odor, but no error codes are displayed.
Water Chemistry Imbalance / Contamination
Symptom
Spa will not heat, water stays cold even though pumps run and set temperature is high.
Heater Element Failure
Symptom
Topside control panel display is blank, but GFCI breaker is not tripped.
No Low-Voltage Power to Topside Panel
Symptom
Water is leaking from around one or more jets in the spa shell.
Jet Body or Gasket Leak
| Error Code | Symptom | Fault Type | Guide |
|---|---|---|---|
| COd |
Display shows COd or COLD, spa may run pumps but not heat normally.
|
Cold Water Protection / Cold Start Mode | View Details |
| COL |
Display shows COL or COOL, heater does not run, spa may run pumps to circulate water.
|
Cool Condition / Water Below Set Threshold | View Details |
| dr |
Control panel shows dr or DR, spa may shut down heating cycle, jets may still operate but heater is disabled.
|
Dry Fire Protection / Inadequate Water in Heater | View Details |
| drY |
Display shows drY or DRY, spa shuts down heater immediately.
|
Dry Heater Detected / No Water in Heater | View Details |
| dy |
Control panel displays dy or DY, spa stops heating and may shut down temporarily.
|
Dry Heater Detected / Overheat Due to Low Flow | View Details |
| Er1 |
Display shows Er1 or ERR1, spa functions may be limited or shut down.
|
Topside Control Panel Communication Error | View Details |
| Er2 |
Display shows Er2 or ERR2, some or all buttons may not respond.
|
Keypad Button Stuck or Shorted | View Details |
| Er3 |
Display shows Er3 or ERR3, spa may shut down or behave erratically.
|
Internal Control Board Error | View Details |
| Er4 |
Display shows Er4 or ERR4, heater and pumps may be disabled.
|
Heater Relay or Current Sense Error | View Details |
| FLO |
Control panel displays FLO or FL, jets may not run, heater will not turn on, possible blinking light on topside control.
|
Low Water Flow / Flow Switch Open | View Details |
| HFL |
Display shows HFL or Ht FLO, spa may shut down heater but pumps still operate.
|
Heater Flow Low / Heater Flow Protection | View Details |
| HL |
Display shows HL or HLo, spa shuts down heater and may disable pumps until reset.
|
High Limit Sensor Trip / Over-Temperature at Heater | View Details |
| ICE |
Control panel shows ICE or IC, pumps may run automatically even when spa is not in use.
|
Freeze Protection Mode | View Details |
| LF |
Display shows LF or LOW FLO, spa may shut down heater after repeated low-flow detections.
|
Persistent Low Flow Condition | View Details |
| LOC |
Control panel displays LOC or LOCK, buttons do not respond or only limited functions work.
|
Panel Lock / Child Lock Activated | View Details |
| OH |
Control panel shows OH or OHH, spa shuts down, pumps may run briefly to cool water, topside may flash an overheat warning.
|
Overheat Condition / High Limit Trip | View Details |
| PF |
Display shows PF or PFAIL, spa resets unexpectedly or loses settings.
|
Power Failure / Low Line Voltage Detected | View Details |
| Prr |
Display shows Prr or PR, spa may be in priming mode after power-up, pumps may run intermittently.
|
Priming Mode / Pump Priming Routine | View Details |
| SE |
Display shows SE or SENSOR ERROR, spa may shut down heating.
|
General Sensor Error | View Details |
| Sn1 |
Control panel displays Sn1, SN1, or SENSOR 1, spa may not heat and may shut down.
|
Water Temperature Sensor Failure | View Details |
| Sn2 |
Control panel displays Sn2, SN2, or SENSOR 2, spa may shut down heating and show sensor error.
|
High Limit Sensor Failure | View Details |
| — — |
Display shows dashes (— —) or blank temperature reading, spa may not heat.
|
No Temperature Data / Sensor Not Detected | View Details |
| – |
Circulation pump is noisy, rattling, or grinding during operation.
|
Worn Circulation Pump Bearings or Debris in Impeller | View Details |
| – |
Jets are weak or have very little pressure even though the pump is running.
|
Low Jet Pressure / Restricted Flow | View Details |
| – |
LED lights in the spa do not work or are stuck on one color, while other functions are normal.
|
LED Lighting System Failure | View Details |
| – |
Main jet pump does not start, only a humming sound is heard when jets are turned on.
|
Jet Pump Motor Stalled or Failed | View Details |
| – |
Ozone generator indicator is off and there is no ozone smell when the spa is circulating.
|
Ozone Generator Failure | View Details |
| – |
Some buttons on the topside control work, but others do nothing or respond intermittently.
|
Partial Keypad Failure | View Details |
| – |
Spa cabinet panels are bulging or warped, and there is moisture or mold inside the cabinet.
|
Chronic Moisture Intrusion / Insulation Saturation | View Details |
| – |
Spa cover is extremely heavy and waterlogged, difficult to lift, and may sag into the water.
|
Waterlogged Spa Cover | View Details |
| – |
Spa is leaking water from the equipment compartment area.
|
Plumbing or Component Leak in Equipment Bay | View Details |
| – |
Spa trips the GFCI breaker immediately or within a few seconds of turning it on.
|
Ground Fault / Electrical Short | View Details |
| – |
Spa water has a strong burnt plastic or electrical smell when pumps or heater run.
|
Overheating Electrical Component | View Details |
| – |
Spa water is foamy and has an unpleasant odor, but no error codes are displayed.
|
Water Chemistry Imbalance / Contamination | View Details |
| – |
Spa will not heat, water stays cold even though pumps run and set temperature is high.
|
Heater Element Failure | View Details |
| – |
Topside control panel display is blank, but GFCI breaker is not tripped.
|
No Low-Voltage Power to Topside Panel | View Details |
| – |
Water is leaking from around one or more jets in the spa shell.
|
Jet Body or Gasket Leak | View Details |
No matching codes found
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