Parts Overview
Common Replacement Parts:
- Magnetron Assembly
- Turntable Motor
- Door Switch Assembly
- High Voltage Capacitor
- Control Panel Membrane
- Thermal Cut-Off
Main Components Identification
- Magnetron: Generates microwave energy for cooking - located behind the waveguide cover
- High Voltage Diode: Converts AC to DC voltage - mounted near the capacitor
- Turntable System: Includes motor, roller guide, and glass tray for even cooking
- Door Interlock System: Safety switches that prevent operation when door is open
- Control Board: Main computer that operates all microwave functions
- Waveguide Cover: Protects magnetron from food splatter and moisture
- Cavity Light: Illuminates the interior during operation
Replacement Guide
| Model Series | FGMO205KFB, FGMO155KFB, FGMO185KFB |
| Type | Countertop Microwave Oven |
| Color | Stainless Steel / Black |
| Cavity Capacity | 2.0 cu. ft. |
| Power Output | 1000 Watts |
| Control Type | Electronic Touch Controls |
| Turntable Diameter | 12.4 inches |
| External Dimensions | 20.9 x 16.8 x 12.5 inches |
| Weight | 35.3 lbs |
| Power Requirements | 120V, 60Hz, 15A |
Warranty Information
- Full Warranty: 1 year parts and labor
- Magnetron Warranty: 5 years limited warranty
- Additional Coverage: Optional extended service plans available
For warranty service, contact Frigidaire Customer Service at 1-800-374-4432 or visit Frigidaire.com
Technical Specifications
Magnetron Specifications
Type: OM75P(31), Output: 1000W, Frequency: 2450MHz, Anode Voltage: 4.2kV, Filament Voltage: 3.3V
High Voltage Transformer
Primary: 120V AC, Secondary High: 2000V AC, Secondary Low: 3.3V AC, Power Rating: 1350VA
Turntable Motor
Type: Synchronous Motor, Voltage: 120V AC, Rotation Speed: 4-6 RPM, Torque: 30 kg-cm
High Voltage Capacitor
Capacitance: 1.0 µF, Voltage Rating: 2100V AC, Safety Resistor: 10 MΩ
Door Switch Assembly
Monitor Switch: Normally closed, Primary Switch: Normally open, Secondary Switch: Normally open
Thermal Protection
Cut-off Temperature: 257°F (125°C), Type: Non-resettable thermal fuse, Rating: 10A/250V
Electrical Specifications
Power Input
120V AC, 60Hz, 15A maximum, 1450W input power
Microwave Output
1000W nominal, 2450MHz frequency, IEC-705 measurement
Efficiency
Approximately 69% power conversion efficiency at full power
Safety Standards
UL 923, FCC Part 18, IEC 60335-2-25 compliant
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Microwave won't start | Door switch failure, control board issue, thermal fuse blown | Check door switches, test thermal fuse, inspect control board |
| No heat but runs | Magnetron failure, high voltage diode, capacitor issue | Test high voltage components, check magnetron continuity |
| Turntable not rotating | Turntable motor failure, roller guide worn, obstruction | Replace turntable motor, check roller guide, remove obstructions |
| Sparkling inside | Metal object inside, waveguide cover damaged, dirty cavity | Remove metal objects, replace waveguide cover, clean cavity |
| Unusual noises | Fan motor worn, transformer loose, magnetron failing | Check cooling fan, secure transformer, test magnetron |
| Display not working | Control membrane damaged, main board failure, power supply | Replace control panel, check main board, test power supply |
Error Codes
- F1: Control panel communication error - Check wiring harness
- F2: Temperature sensor failure - Replace cavity thermistor
- F3: Door switch error - Check door interlock switches
- F4: Magnetron temperature high - Check cooling system
- F5: Key stuck error - Clean or replace control panel
- F6: Memory error - Reset or replace main control board
Ordering Parts
Current Model Parts
FGMO205KFB
2.0 cu.ft. Stainless Steel
FGMO155KFB
1.5 cu.ft. Black Stainless
FGMO185KFB
1.8 cu.ft. Gallery Series
FGMO205KFS
2.0 cu.ft. Smudgeproof
Popular Replacement Parts
5304498456
Magnetron Assembly
5304498478
Turntable Motor
5304498512
Control Panel
5304498534
Door Switch Kit