Tristar
Start Circuit / Keypad Input Failure
Multicooker powers on but will not start any program; pressing Start does nothing or cancels immediately.
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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
Defective Start button on keypad membrane, Loose keypad ribbon cable, Firmware lockup, Faulty main control PCB input
How to Fix / Troubleshooting
Safety first: Unplug the cooker before removing any panels.
- Reset the unit: Unplug for 10 minutes, then plug back in and attempt to start a simple program with water.
- Check child lock: Some Tristar models have a child lock feature. Consult the manual to ensure it is not engaged (often by holding a specific button combination).
- Inspect keypad: If accessible, gently lift the control panel and check that the ribbon cable from the keypad to the PCB is fully seated.
- Test other buttons: If only the Start button is unresponsive while others work, the keypad membrane may be worn and require replacement.
If no buttons respond or the unit cancels immediately, the control PCB may be defective and should be replaced by a technician.
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Repair Difficulty
Medium
3/5
Required Part
Control Panel / Keypad Membrane
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