Granitestone
Alarm / Buzzer Circuit Malfunction
Beeping alarm sounds continuously or randomly without any error code.
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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
Stuck buzzer driver transistor on PCB, Firmware glitch, Shorted buzzer, Contaminated touch panel causing false inputs
How to Fix / Troubleshooting
Safety first: Unplug the unit if the beeping is continuous and cannot be silenced.
Steps to troubleshoot:
- 1. Power reset: Unplug for 10–15 minutes to reset the control.
- 2. Clean touch panel: Wipe the touch control panel to remove moisture or grease that may cause false key presses.
- 3. Inspect buzzer: Open the housing and locate the piezo buzzer on the control PCB. Check for visible damage or corrosion.
- 4. Replace control PCB: If the buzzer is driven continuously due to a failed transistor or firmware issue, replace the main control PCB.
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Repair Difficulty
Medium
3/5
Required Part
Main Control PCB
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