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Run the filtering function for 1 minute. If the spa display does not indicate an error code and the unit is
circulating water without issue, no further troubleshooting is necessary. Remove the unit for further testing if
Error Code 94 is confirmed.
a. Begin by swapping out the 20-40℃ water temperature sensor. Disconnect the wire connector
for the sensor and clip on a new replacement. Run the control base on a spa. Change the
20-40℃ water temperature sensor if E94 have been solved, then move on to the next step.
b. Disconnect the flow sensor 20-40℃ on the PCB. Remove screws that hold the heating
element on the support base. Remove screw of equipotential bonding system.
c. Pull the pile out and use wrench to disconnect 20-40 ℃ water temperature sensor
d. After exposing the heater, remove the 20-40℃ temperature sensor. It should be the lower
temperature sensor.
2. If the problem still persists after changing the 20-40℃ sensor, the PCB must be replaced.
Reference the chapter on replacing the PCB for more details.
Remark: If the sensor of 20-40℃ has problem, it recommend to replace sensor of 50 ℃ together.
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