Installation Guide
Tools Needed:
- Screwdrivers (flat and Phillips)
- Measuring tape
- Level
- Drill
- Pencil
Step-by-Step Installation
- Choose Installation Location: Select a location with proper ventilation and adequate clearance on all sides.
- Check Electrical Requirements: Ensure proper 120V, 60Hz, 15A dedicated electrical outlet is available.
- Prepare Mounting Surface: Ensure the mounting surface is strong enough to support the microwave's weight.
- Install Mounting Plate: Secure the mounting plate to the wall using provided hardware.
- Electrical Connection: Connect to a properly grounded outlet. Do not use an extension cord.
- Mount the Microwave: Lift the microwave and hook it onto the mounting plate securely.
- Secure with Screws: Use provided screws to secure the microwave to the mounting plate.
- Test Operation: Test all functions to ensure proper installation and operation.
Specifications
| Model Number | MEZ66990903 |
| Type | Over-the-Range Microwave |
| Color | Stainless Steel |
| Capacity | 2.2 cu. ft. |
| Cooking Power | 1200 Watts |
| Control Type | Touch Controls with LED Display |
| Exhaust System | 300 CFM Ventilation |
| Turntable Size | 16 inches |
| Power Requirements | 120V, 60Hz, 15A |
| Dimensions (HxWxD) | 17 x 30 x 16 inches |
| Weight | 55 lbs |
| Vent Options | Vertical/Horizontal External Venting or Recirculating |
Warranty Information
- Full Warranty: 1 year parts and labor
- Magnetron Warranty: 10 years on magnetron
- Additional Coverage: Optional extended warranty available
For warranty service, contact LG Customer Service at 1-800-243-0000 or visit LG.com
Key Features
Sensor Cooking
Advanced sensor technology automatically detects moisture levels and adjusts cooking time and power for perfect results every time.
Inverter Technology
LG's Inverter Technology delivers a continuous stream of cooking power for even cooking and defrosting, eliminating cold spots.
EasyClean® Interior
The specially coated interior makes cleaning simple and effortless, with a surface that resists stains and wipes clean easily.
SmartThinQ Technology
Wi-Fi enabled for remote control via smartphone app, allowing you to monitor cooking status, download recipes, and receive completion alerts.
Powerful Ventilation
300 CFM ventilation system effectively removes smoke, steam, and cooking odors from your kitchen with multiple venting options.
LED Cooking Guide
Interactive LED display provides step-by-step cooking guidance and makes operation intuitive and user-friendly.
Cooking Programs
Sensor Cook
Automatic cooking for various food types including popcorn, potatoes, and frozen entrees
Sensor Reheat
Intelligent reheating that prevents overheating and maintains food quality
Quick Defrost
Rapid defrosting program for meats, poultry, and frozen foods
Multi-Stage Cooking
Program multiple cooking stages with different power levels and times
Keep Warm
Maintains food at serving temperature without continuing to cook
Child Lock
Safety feature to prevent accidental operation by children
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Microwave won't start | Power issue, door not closed properly | Check power supply, ensure door is latched completely |
| Uneven cooking | Turntable not rotating, improper placement | Check turntable operation, center food on turntable |
| Sparking inside | Metal objects, damaged waveguide cover | Remove metal objects, check waveguide cover |
| Noisy operation | Turntable obstruction, fan issues | Check for obstructions, ensure proper ventilation |
| Display not working | Power surge, control board issue | Reset circuit breaker, contact service if persistent |
| Poor ventilation | Blocked vents, improper installation | Clear obstructions, check vent configuration |
Error Codes
- E1: Temperature sensor error - Contact service center
- E2: Communication error - Reset microwave
- E3: Door switch error - Check door alignment
- E4: Magnetron error - Contact service center
- E5: Turntable motor error - Check for obstructions
- E6: Keypad error - Reset control panel
Manual Downloads
Current Model Manuals
MEZ66990903
2.2 cu. ft. Smart Inverter Microwave
MEZ66990904
2.2 cu. ft. Black Stainless
MEZ66990905
2.2 cu. ft. White
MEZ66990906
2.2 cu. ft. ThinQ Enabled
Popular Previous Models
LMV2031ST
2.0 cu. ft. Stainless Steel
LMC2075ST
2.0 cu. ft. Convection
LMV1762ST
1.7 cu. ft. Stainless Steel
LMC1575ST
1.5 cu. ft. Convection