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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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