NetSpa
NetSpa 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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E01
Control panel displays E01 and the NetSpa hot tub will not heat; pump may still run in filtration mode.
Water Flow / Low Flow Protection Fault
E02
Display shows E02 and the heater shuts off; spa may run briefly then stop heating again.
Overheat / High Temperature Protection
E03
NetSpa control panel shows E03 and the pump will not start or stops shortly after starting.
Pump Overload / Pump Protection Fault
E04
Display shows E04 and heating is disabled; spa may still circulate water.
Temperature Sensor (NTC) Fault
E05
NetSpa hot tub shows E05 and will not start the massage or filtration cycle.
Water Level / Dry-Run Protection Fault
E06
Display shows E06 and none of the buttons respond, or only some functions work intermittently.
Keypad / Control Panel Communication Fault
E07
NetSpa spa shows E07 and the heater and pump shut down immediately after start.
Ground Fault / Leakage Current Detection
E08
Display shows E08 and the heater does not operate; pump may still run.
Heater Relay / Heating Circuit Fault
E09
NetSpa hot tub shows E09 and the bubble (air blower) function will not start.
Air Blower Overload / Fault
E10
Display shows E10 and the NetSpa spa cannot maintain the set temperature; heating cycles are erratic.
Temperature Calibration / Dual Sensor Mismatch
E11
NetSpa control panel shows E11 and the filtration cycle cannot be started or stops immediately.
Filtration Timer / Program Fault
E12
Display shows E12 and the NetSpa spa shuts down unexpectedly during operation.
Internal Overtemperature of Control Unit
E13
NetSpa spa shows E13 and the bubbles or massage function cannot be activated from the panel.
Function Relay / Output Driver Fault
E14
Display shows E14 and the NetSpa spa cannot detect the motor unit correctly; no functions operate.
Module Identification / Configuration Fault
E15
NetSpa spa shows E15 and the display backlight may flicker; spa may shut off randomly.
Low Line Voltage / Power Supply Fault
Symptom
NetSpa bubbles (air blower) are very weak or uneven around the ring, with no error code.
Reduced Air Blower Output
Symptom
NetSpa control panel buttons are unresponsive or require very hard pressing to work, with no error code.
Worn or Water-Damaged Keypad Membrane
Symptom
NetSpa display is very dim, flickering, or segments are missing, but the spa still operates.
Display Module Degradation
Symptom
NetSpa hot tub is leaking water from around the base of the motor/heater unit or hose connections.
External Plumbing Leak at Motor Unit
Symptom
NetSpa hot tub is not heating at all, but the pump and bubbles work normally and no error code is displayed.
Heater Element Failure Without Code
Symptom
NetSpa hot tub will not start at all; no lights on the control panel and no response when pressing buttons.
No Power / Dead Control Unit
Symptom
NetSpa inflatable walls feel soft or sagging even after inflation; spa loses air over time.
Slow Air Leak in Inflatable Structure
Symptom
NetSpa pump is running but there is very weak water flow from the return jet; heating is poor and no code is shown.
Restricted Circulation Flow
Symptom
NetSpa pump makes a loud grinding or rattling noise during operation, with normal or slightly reduced flow.
Pump Impeller or Bearing Wear
Symptom
NetSpa spa cover is waterlogged, heavy, and no longer insulates well; condensation drips from inside.
Degraded Insulated Cover
Symptom
NetSpa spa displays temperature that is clearly inaccurate (e.g., shows 40°C when water feels lukewarm) but no error code appears.
Temperature Sensor Drift / Miscalibration
Symptom
NetSpa spa emits a loud buzzing or humming from the blower area when bubbles are turned on, but no air comes out.
Seized Air Blower Motor
Symptom
NetSpa spa heats very slowly or cannot reach the set temperature, especially in cold weather, with no error code.
Insufficient Heating Performance
Symptom
NetSpa spa jets or return fitting vibrate excessively and the spa body shakes during massage mode.
Hydraulic Imbalance / Vibration
Symptom
NetSpa spa makes a clicking sound from the motor unit but the pump or heater does not start.
Relay Operation Without Load Activation
Symptom
NetSpa spa produces a high-pitched whining or humming noise from the pump area, but water flow is low or intermittent.
Pump Cavitation / Air Lock
Symptom
NetSpa spa repeatedly inflates and deflates unevenly when using the integrated inflation function.
Inflation Control or Valve Issue
Symptom
NetSpa spa shuts off after running for a short time, then can be restarted after cooling down.
Thermal Overload Cycling
Symptom
NetSpa spa trips the RCD/GFCI or household breaker as soon as it is plugged in or when heating starts, with no specific error code.
Electrical Short or Ground Fault Under Load
Symptom
NetSpa spa water appears cloudy or milky even after running filtration.
Suspended Solids / Filtration Inefficiency
Symptom
NetSpa spa water feels slimy on the walls or has visible biofilm rings at the waterline.
Biofilm and Organic Contamination
Symptom
NetSpa spa water has a strong chemical or musty odor despite normal operation.
Water Quality / Sanitation Imbalance
Symptom
Water is leaking from the bottom or side wall of the NetSpa inflatable spa body, not from hoses or motor unit.
Spa Shell / Liner Puncture or Seam Leak
| Error Code | Symptom | Fault Type | Guide |
|---|---|---|---|
| E01 |
Control panel displays E01 and the NetSpa hot tub will not heat; pump may still run in filtration mode.
|
Water Flow / Low Flow Protection Fault | View Details |
| E02 |
Display shows E02 and the heater shuts off; spa may run briefly then stop heating again.
|
Overheat / High Temperature Protection | View Details |
| E03 |
NetSpa control panel shows E03 and the pump will not start or stops shortly after starting.
|
Pump Overload / Pump Protection Fault | View Details |
| E04 |
Display shows E04 and heating is disabled; spa may still circulate water.
|
Temperature Sensor (NTC) Fault | View Details |
| E05 |
NetSpa hot tub shows E05 and will not start the massage or filtration cycle.
|
Water Level / Dry-Run Protection Fault | View Details |
| E06 |
Display shows E06 and none of the buttons respond, or only some functions work intermittently.
|
Keypad / Control Panel Communication Fault | View Details |
| E07 |
NetSpa spa shows E07 and the heater and pump shut down immediately after start.
|
Ground Fault / Leakage Current Detection | View Details |
| E08 |
Display shows E08 and the heater does not operate; pump may still run.
|
Heater Relay / Heating Circuit Fault | View Details |
| E09 |
NetSpa hot tub shows E09 and the bubble (air blower) function will not start.
|
Air Blower Overload / Fault | View Details |
| E10 |
Display shows E10 and the NetSpa spa cannot maintain the set temperature; heating cycles are erratic.
|
Temperature Calibration / Dual Sensor Mismatch | View Details |
| E11 |
NetSpa control panel shows E11 and the filtration cycle cannot be started or stops immediately.
|
Filtration Timer / Program Fault | View Details |
| E12 |
Display shows E12 and the NetSpa spa shuts down unexpectedly during operation.
|
Internal Overtemperature of Control Unit | View Details |
| E13 |
NetSpa spa shows E13 and the bubbles or massage function cannot be activated from the panel.
|
Function Relay / Output Driver Fault | View Details |
| E14 |
Display shows E14 and the NetSpa spa cannot detect the motor unit correctly; no functions operate.
|
Module Identification / Configuration Fault | View Details |
| E15 |
NetSpa spa shows E15 and the display backlight may flicker; spa may shut off randomly.
|
Low Line Voltage / Power Supply Fault | View Details |
| – |
NetSpa bubbles (air blower) are very weak or uneven around the ring, with no error code.
|
Reduced Air Blower Output | View Details |
| – |
NetSpa control panel buttons are unresponsive or require very hard pressing to work, with no error code.
|
Worn or Water-Damaged Keypad Membrane | View Details |
| – |
NetSpa display is very dim, flickering, or segments are missing, but the spa still operates.
|
Display Module Degradation | View Details |
| – |
NetSpa hot tub is leaking water from around the base of the motor/heater unit or hose connections.
|
External Plumbing Leak at Motor Unit | View Details |
| – |
NetSpa hot tub is not heating at all, but the pump and bubbles work normally and no error code is displayed.
|
Heater Element Failure Without Code | View Details |
| – |
NetSpa hot tub will not start at all; no lights on the control panel and no response when pressing buttons.
|
No Power / Dead Control Unit | View Details |
| – |
NetSpa inflatable walls feel soft or sagging even after inflation; spa loses air over time.
|
Slow Air Leak in Inflatable Structure | View Details |
| – |
NetSpa pump is running but there is very weak water flow from the return jet; heating is poor and no code is shown.
|
Restricted Circulation Flow | View Details |
| – |
NetSpa pump makes a loud grinding or rattling noise during operation, with normal or slightly reduced flow.
|
Pump Impeller or Bearing Wear | View Details |
| – |
NetSpa spa cover is waterlogged, heavy, and no longer insulates well; condensation drips from inside.
|
Degraded Insulated Cover | View Details |
| – |
NetSpa spa displays temperature that is clearly inaccurate (e.g., shows 40°C when water feels lukewarm) but no error code appears.
|
Temperature Sensor Drift / Miscalibration | View Details |
| – |
NetSpa spa emits a loud buzzing or humming from the blower area when bubbles are turned on, but no air comes out.
|
Seized Air Blower Motor | View Details |
| – |
NetSpa spa heats very slowly or cannot reach the set temperature, especially in cold weather, with no error code.
|
Insufficient Heating Performance | View Details |
| – |
NetSpa spa jets or return fitting vibrate excessively and the spa body shakes during massage mode.
|
Hydraulic Imbalance / Vibration | View Details |
| – |
NetSpa spa makes a clicking sound from the motor unit but the pump or heater does not start.
|
Relay Operation Without Load Activation | View Details |
| – |
NetSpa spa produces a high-pitched whining or humming noise from the pump area, but water flow is low or intermittent.
|
Pump Cavitation / Air Lock | View Details |
| – |
NetSpa spa repeatedly inflates and deflates unevenly when using the integrated inflation function.
|
Inflation Control or Valve Issue | View Details |
| – |
NetSpa spa shuts off after running for a short time, then can be restarted after cooling down.
|
Thermal Overload Cycling | View Details |
| – |
NetSpa spa trips the RCD/GFCI or household breaker as soon as it is plugged in or when heating starts, with no specific error code.
|
Electrical Short or Ground Fault Under Load | View Details |
| – |
NetSpa spa water appears cloudy or milky even after running filtration.
|
Suspended Solids / Filtration Inefficiency | View Details |
| – |
NetSpa spa water feels slimy on the walls or has visible biofilm rings at the waterline.
|
Biofilm and Organic Contamination | View Details |
| – |
NetSpa spa water has a strong chemical or musty odor despite normal operation.
|
Water Quality / Sanitation Imbalance | View Details |
| – |
Water is leaking from the bottom or side wall of the NetSpa inflatable spa body, not from hoses or motor unit.
|
Spa Shell / Liner Puncture or Seam Leak | View Details |
No matching codes found
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