Frigidaire
No Start – Door Interlock or Control Logic Fault
Microwave will not start at all; display is lit and keypad responds, 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
Faulty door switch, Misaligned door latch, Defective start button on keypad, Failed relay on main control board
How to Fix / Troubleshooting
Safety First: Unplug the microwave before internal inspection.
Basic checks:
- Door closure: Open and close the door firmly. Try lifting slightly on the door while pressing Start; if it runs only when lifted, the door switches or latch are misaligned.
- Keypad test: Try other functions (e.g., timer). If some keys do not respond, the keypad may be failing.
Advanced checks:
- Access door switches: Remove the control panel and inner trim to reach the door switch assembly.
- Inspect and replace: Replace any worn or misaligned Frigidaire door switches or the door latch assembly. If switches test good, the main control board or keypad may need replacement.
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Repair Difficulty
Hard
4/5
Required Part
Door Switch Assembly
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