Cannot Switch Modes on JD20U
Published at: 2026-05-21
Correct mode-switching operation
Potential Causes
- The Mode button was pressed repeatedly too quickly.
- The device has not completed the mode-switching process.
- The button may be blocked or not responding normally.
Troubleshooting Steps
- Press the Mode button once
To switch modes, press the Mode button once. - Wait for the beep sounds
Please wait until you hear 3 beeps. The device will then switch modes automatically. - Do not press again too quickly
Avoid pressing the Mode button again before hearing the 3 beeps, as this may interrupt the mode-switching process. - Check the button
Make sure there is no debris or obstruction around the button.
Details
The mode switching sequence is:
M01 → M02 → M03 → M01
If the device still cannot switch modes correctly after following the steps above, please prepare your order number, a short video showing the button operation and screen display, and your device SN code / Serial Number, then fill out the form.
Where to find the SN code:
For the JMOON by Ulike ReGlow Max (JD20U), the SN code / Serial Number is located at the bottom of the device, near the area below the Jmoon logo.
For the JMOON by Ulike ReGlow Max (JD20U), the SN code / Serial Number is located at the bottom of the device, near the area below the Jmoon logo.
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