![]() ![]() If the E90 code appears after running for a while:Ĭheck and ensure there is no debris inside the spa tub inlet and outlet grids.If there is no water flowing after removing the filter cartridge assemblyĬheck and ensure the in/outlet connections between the spa tub and the spa control unit are not blocked, twisted or leaking.It is likely to be an issue with the filter motor – you can buy replacement motors or claim a free replacement under warranty via our Spare Parts Shop If the E90 code appears instantly with the filter assembly removed:.Make sure there is no air inside before putting it into the cartridge housing) (Note: submerge and shake the cartridge under water for several times. Then rinse with a power shower or something that has some force behind the water to get deep into the inner grooves. To clean the filter cartridge you can soak it in warm soapy water for 20-30 minutes, giving the surface a light brush. ![]() If the spa works with the filter cartridge assembly removed, then it is likely to be a filter issue:.Turn the control unit back on and try to run the spa as normal with these removed for a period of 1-2 hours. To do this, turn off the control unit and remove the filter cartridge and the filter cartridge housing completely from the inside of the spa tub. The filter cartridge is clean and properly installed. If alarm code E90 is displayed on the control panel, it means no water is flowing through the system. ![]()
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