Clatronic
Start Circuit / Keypad Failure
Microwave display works and timer counts down, but pressing START does nothing.
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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 membrane keypad, Loose keypad ribbon cable, Faulty control PCB input circuit, Child lock function enabled
How to Fix / Troubleshooting
Steps:
- Check child lock: Many Clatronic microwaves have a child lock. Look for a key symbol on the display. Disable it by holding the STOP/CANCEL or specific key combination as described in the user manual.
- Test other keys: Press multiple buttons. If some keys respond and others do not, the membrane keypad may be failing.
- Power reset: Unplug the unit for 5–10 minutes, then plug back in and test again.
- Inspect keypad cable (technician): Remove the control panel (unplugged) and reseat the flat ribbon cable between the keypad and control PCB.
Warning: If the keypad membrane is defective, it usually needs replacement as a complete assembly.
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Repair Difficulty
Medium
3/5
Required Part
Membrane Keypad
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