Stan/Tuva/Lena/Elin Smart Toilet: Weak or No Flush

Stan/Tuva/Lena/Elin Smart Toilet: Weak or No Flush

The Stan/Tuva/Lena/Elin Smart Toilet is a cutting-edge bathroom fixture designed to provide an enhanced user experience. However, like any complex system, it may encounter issues over time. One common problem users may encounter is a weak flush or no flush at all, where there is no water flow. This knowledge article aims to provide a step-by-step troubleshooting guide to help you resolve this issue.

Step 1: Inspect the Black Wire Connection

  1. To begin troubleshooting the weak or no flush problem, ensure that the black wire is correctly plugged in with elevated lines matching up. This step is crucial to ensure proper electrical connectivity. Check that the wire is securely connected at both ends and that there are no loose connections or damage to the wire.

Step 2: Clean and Reconnect the Connector

  1. If the black wire connection appears to be correct, the next step is to clean the connector. Unplug and plug the connector back in at least 20 times. This action helps remove any dirt or debris that may be affecting the electrical contact. Ensure that the connector is firmly seated and properly connected each time.

Step 3: Verify for Changes

  1. After cleaning and reconnecting the connector, check if there is any improvement in the flush performance. If the weak or no flush issue is resolved, you can stop troubleshooting. However, if the problem persists, proceed to the next step.

Step 4: Consider Replacing the Solenoid Valve

  1. If the previous steps did not resolve the weak or no flush issue, it is possible that the solenoid valve needs to be replaced. The solenoid valve is responsible for controlling the water flow in the toilet system. Replacing it can help restore proper flushing functionality.


To obtain assistance with the solenoid valve replacement, please open a Support Ticket or call our customer support at 1-866-839-2888. Our Service team members are available Monday to Friday, from 8:00am to 5:00pm EST, to assist you further. When contacting our support team, provide them with detailed information about your issue and the steps you have already taken to troubleshoot.


  1. Do not install a reducer or second anti-return valve. These modifications can disrupt the normal functioning of the smart toilet system.
  2. Ensure that a 9V battery is correctly installed, as specified in the instruction manual. The battery powers the smart toilet's electrical components and is necessary for proper operation.