Tuya Local User Interface Failure

Thermostat buttons or touch screen do not respond, but display is on and Wi-Fi control may still work

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Safety Warning

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

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Possible Causes

Faulty capacitive touch sensor, Damaged button contacts, Loose front panel connector, Firmware freeze of UI task

How to Fix / Troubleshooting

Safety first: Turn off power before removing the front panel.

Steps to troubleshoot:

  • Power-cycle the thermostat at the breaker to clear any temporary firmware freeze.
  • If still unresponsive, remove the front cover and reseat the ribbon cable between the front panel and main PCB.
  • Inspect for physical damage to the glass or touch surface; replace the front panel if cracked.
  • Check for signs of liquid ingress; clean and dry thoroughly if present.
  • If Wi-Fi control works but local buttons never respond, the touch controller or button PCB is likely defective; replace the front UI module or thermostat.
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Repair Difficulty

Medium 3/5

Required Part

Front Touch/Button Interface PCB (Tuya Thermostat)
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