Wellis
Wellis 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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COdE
Display shows CODE or similar and spa does not start normal operation after power-up
Configuration / Dip Switch or Software Configuration Error
dr
Display shows dr or DR and spa shuts down heater, may show low water level symbol
Dry Fire Protection / Inadequate Water in Heater
dy
Display shows dy or DY after dr, spa remains shut down
Persistent Dry Condition Lockout
EC
Display shows EC or ECO and spa heats only during filtration cycles
Economy Heating Mode Active (Not a Fault)
F1
Control panel displays F1 and spa will not run any pumps or heater
Water Flow Fault / Low Flow Through Heater
F2
Display shows F2 and heater does not operate, spa may run pumps but water will not heat
Heater Overheat / High-Limit Trip
F3
F3 displayed, spa may heat erratically or not at all
Temperature Sensor Fault (Water Probe Error)
F4
F4 error and spa pumps may not start or may shut off unexpectedly
Pump 1 Sensor / Current Fault
F5
F5 displayed, secondary pump will not run or trips immediately
Pump 2 Sensor / Current Fault
F6
F6 error, blower or auxiliary device will not operate
Blower / Auxiliary Output Fault
F7
F7 displayed, spa may shut down or run erratically
Low Line Voltage / Power Supply Fault
F8
F8 error, spa may not respond to button presses or may reboot intermittently
Topside Control Panel Communication Fault
F9
F9 displayed, spa may not heat and may show erratic temperature readings
Sensor Mismatch / Dual Sensor Error
FLC
Display shows FLC or FL2, heater disabled even though pump is off
Flow Switch Closed When It Should Be Open
FLO
Display shows FLO or FL1, heater disabled, pumps may still run
Flow Switch Open / Insufficient Flow
HL
Display shows HL or HLo, pumps may run but heater is disabled
High-Limit Trip (Local Overheat at Heater)
ICE
Display shows ICE or cold symbol, pumps may run automatically
Freeze Protection Active (Not a Fault)
LOC
Display shows LOC or lock symbol, buttons do not respond
Panel Lock / Child Lock Activated
OH
Display shows OH or OHH and spa shuts down, water feels excessively hot
Overheat Condition (Water Temperature Too High)
SE
Display shows SE or SEr and spa may not respond correctly to commands
Software Error / Internal Control Pack Fault
SN
Display shows SN, SN1, or SNA and spa may not heat
Sensor Open / Disconnected
SNS
Display shows SNS, SN2, or SNB and spa shuts down heater
Sensor Short / Out-of-Range Low
Symptom
Air blower runs but produces weak or no bubbles
Air Blower Flow Restriction
Symptom
Cover is heavy, waterlogged, and difficult to remove
Waterlogged Spa Cover
Symptom
Jet pump runs but no water comes out of jets after refill
Air Lock in Jet Pump
Symptom
Jets are weak or uneven, poor massage pressure
Low Jet Pressure / Hydraulic Restriction
Symptom
LED lights flicker, some zones not working, or lights stuck on one color
LED Lighting System Fault
Symptom
Loud humming from pump but little or no water movement
Seized Pump Motor or Blocked Impeller
Symptom
Ozone or UV sanitizer not operating, water quality deteriorates faster
Ozone/UV System Failure
Symptom
Persistent foaming on water surface even after skimming
Foamy Water / Surfactant Contamination
Symptom
Scale buildup on shell, heater, and jets (white crusty deposits)
Limescale / High Calcium Hardness
Symptom
Spa cabinet or equipment bay smells musty or moldy
Moisture Accumulation / Poor Ventilation
Symptom
Spa is leaking water inside cabinet or onto ground
Plumbing Leak / Shell Penetration Leak
Symptom
Spa makes loud grinding or squealing noise when pump runs
Worn Pump Bearings / Mechanical Failure
Symptom
Spa powers on but will not heat, temperature stays below set point with no error code
No Heat Without Error
Symptom
Spa trips the GFCI/RCD or main breaker when pumps or heater start
Ground Fault or Overcurrent Trip
Symptom
Spa will not power on at all, no lights or display
No Power / Dead Spa
Symptom
Strong chemical or musty odor from spa water
Water Odor / Poor Sanitation
Symptom
Strong vibration or rattling from spa cabinet when jets are on
Excessive Vibration / Loose Mounting
Symptom
Topside control buttons are unresponsive or intermittent (no LOC code)
Keypad Failure / Moisture Intrusion
Symptom
Water is cloudy or milky despite running filtration
Cloudy Water / Suspended Particles
Symptom
Water level drops noticeably between uses without visible external leak
Slow Leak / Evaporation vs. Hidden Leak
| Error Code | Symptom | Fault Type | Guide |
|---|---|---|---|
| COdE |
Display shows CODE or similar and spa does not start normal operation after power-up
|
Configuration / Dip Switch or Software Configuration Error | View Details |
| dr |
Display shows dr or DR and spa shuts down heater, may show low water level symbol
|
Dry Fire Protection / Inadequate Water in Heater | View Details |
| dy |
Display shows dy or DY after dr, spa remains shut down
|
Persistent Dry Condition Lockout | View Details |
| EC |
Display shows EC or ECO and spa heats only during filtration cycles
|
Economy Heating Mode Active (Not a Fault) | View Details |
| F1 |
Control panel displays F1 and spa will not run any pumps or heater
|
Water Flow Fault / Low Flow Through Heater | View Details |
| F2 |
Display shows F2 and heater does not operate, spa may run pumps but water will not heat
|
Heater Overheat / High-Limit Trip | View Details |
| F3 |
F3 displayed, spa may heat erratically or not at all
|
Temperature Sensor Fault (Water Probe Error) | View Details |
| F4 |
F4 error and spa pumps may not start or may shut off unexpectedly
|
Pump 1 Sensor / Current Fault | View Details |
| F5 |
F5 displayed, secondary pump will not run or trips immediately
|
Pump 2 Sensor / Current Fault | View Details |
| F6 |
F6 error, blower or auxiliary device will not operate
|
Blower / Auxiliary Output Fault | View Details |
| F7 |
F7 displayed, spa may shut down or run erratically
|
Low Line Voltage / Power Supply Fault | View Details |
| F8 |
F8 error, spa may not respond to button presses or may reboot intermittently
|
Topside Control Panel Communication Fault | View Details |
| F9 |
F9 displayed, spa may not heat and may show erratic temperature readings
|
Sensor Mismatch / Dual Sensor Error | View Details |
| FLC |
Display shows FLC or FL2, heater disabled even though pump is off
|
Flow Switch Closed When It Should Be Open | View Details |
| FLO |
Display shows FLO or FL1, heater disabled, pumps may still run
|
Flow Switch Open / Insufficient Flow | View Details |
| HL |
Display shows HL or HLo, pumps may run but heater is disabled
|
High-Limit Trip (Local Overheat at Heater) | View Details |
| ICE |
Display shows ICE or cold symbol, pumps may run automatically
|
Freeze Protection Active (Not a Fault) | View Details |
| LOC |
Display shows LOC or lock symbol, buttons do not respond
|
Panel Lock / Child Lock Activated | View Details |
| OH |
Display shows OH or OHH and spa shuts down, water feels excessively hot
|
Overheat Condition (Water Temperature Too High) | View Details |
| SE |
Display shows SE or SEr and spa may not respond correctly to commands
|
Software Error / Internal Control Pack Fault | View Details |
| SN |
Display shows SN, SN1, or SNA and spa may not heat
|
Sensor Open / Disconnected | View Details |
| SNS |
Display shows SNS, SN2, or SNB and spa shuts down heater
|
Sensor Short / Out-of-Range Low | View Details |
| – |
Air blower runs but produces weak or no bubbles
|
Air Blower Flow Restriction | View Details |
| – |
Cover is heavy, waterlogged, and difficult to remove
|
Waterlogged Spa Cover | View Details |
| – |
Jet pump runs but no water comes out of jets after refill
|
Air Lock in Jet Pump | View Details |
| – |
Jets are weak or uneven, poor massage pressure
|
Low Jet Pressure / Hydraulic Restriction | View Details |
| – |
LED lights flicker, some zones not working, or lights stuck on one color
|
LED Lighting System Fault | View Details |
| – |
Loud humming from pump but little or no water movement
|
Seized Pump Motor or Blocked Impeller | View Details |
| – |
Ozone or UV sanitizer not operating, water quality deteriorates faster
|
Ozone/UV System Failure | View Details |
| – |
Persistent foaming on water surface even after skimming
|
Foamy Water / Surfactant Contamination | View Details |
| – |
Scale buildup on shell, heater, and jets (white crusty deposits)
|
Limescale / High Calcium Hardness | View Details |
| – |
Spa cabinet or equipment bay smells musty or moldy
|
Moisture Accumulation / Poor Ventilation | View Details |
| – |
Spa is leaking water inside cabinet or onto ground
|
Plumbing Leak / Shell Penetration Leak | View Details |
| – |
Spa makes loud grinding or squealing noise when pump runs
|
Worn Pump Bearings / Mechanical Failure | View Details |
| – |
Spa powers on but will not heat, temperature stays below set point with no error code
|
No Heat Without Error | View Details |
| – |
Spa trips the GFCI/RCD or main breaker when pumps or heater start
|
Ground Fault or Overcurrent Trip | View Details |
| – |
Spa will not power on at all, no lights or display
|
No Power / Dead Spa | View Details |
| – |
Strong chemical or musty odor from spa water
|
Water Odor / Poor Sanitation | View Details |
| – |
Strong vibration or rattling from spa cabinet when jets are on
|
Excessive Vibration / Loose Mounting | View Details |
| – |
Topside control buttons are unresponsive or intermittent (no LOC code)
|
Keypad Failure / Moisture Intrusion | View Details |
| – |
Water is cloudy or milky despite running filtration
|
Cloudy Water / Suspended Particles | View Details |
| – |
Water level drops noticeably between uses without visible external leak
|
Slow Leak / Evaporation vs. Hidden Leak | View Details |
No matching codes found
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