LG MVEL2033F Charcoal Filter Replacement – Step-by-Step Guide

Charcoal Filter Replacement Guide

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If your LG MVEL2033F over-the-range microwave has odor issues or poor ventilation when using recirculating mode, the charcoal filter likely needs replacement. The charcoal filter removes odors and particles from the air when the microwave is set to recirculate (not vent to outside). This is an EASY maintenance task that should be done every 6-12 months.

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Understanding Ventilation Modes

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Over-the-range microwaves have two ventilation modes:

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Vented mode: Air is exhausted to the outside through ductwork
Recirculating mode: Air passes through charcoal filter and returns to kitchen

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The charcoal filter is only used in recirculating mode. If your microwave vents to the outside, you don’t need a charcoal filter.

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Symptoms of Charcoal Filter Failure

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Common signs that indicate the charcoal filter needs replacement:

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Odors from cooking aren’t being removed
Poor air quality in kitchen when using ventilation
Filter is more than 6-12 months old
Filter appears dirty or discolored
Reduced ventilation efficiency in recirculating mode

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⚠️ Safety Note

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Always unplug the microwave before replacing the filter. While this is a simple task, it’s good practice to ensure the microwave is off.

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Parts Needed

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LG LT120F Charcoal Filter (Part #: LT120F)

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Note: Charcoal filters are not cleanable – they must be replaced when they become saturated with odors and particles.

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Tools Required

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None! This is a tool-free replacement
Optional: Step stool if you need better reach
Optional: Vacuum cleaner to clean the filter area

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Step-by-Step Instructions

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Step 1: Turn Off Power

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Unplug the microwave from the wall outlet, or turn off the circuit breaker. This ensures safety while working on the filter.

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Step 2: Locate the Charcoal Filter

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The charcoal filter is typically located on the top of the microwave, behind a removable grille or cover. On some models, it may be accessed from the front or bottom. Look for a grille or cover that can be removed. The filter is usually a flat, rectangular charcoal pad.

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Step 3: Remove the Filter Cover

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The filter is behind a grille or cover. This may be held in place by clips, screws, or may slide out. Gently remove the cover to access the filter. Some covers simply pull down, while others may need to be unclipped or unscrewed.

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Step 4: Remove the Old Filter

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Once the cover is removed, you’ll see the charcoal filter. It’s typically a flat, rectangular pad. Gently pull it out of its housing. The filter may slide out easily, or you may need to pull it from a slot. Handle it carefully – old filters can be dusty.

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Step 5: Clean the Filter Housing

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While the filter is removed, clean the filter housing area:

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Wipe away any dust or debris
Use a vacuum cleaner to remove loose particles
Clean the area where the new filter will sit
Ensure the housing is dry before installing the new filter

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Step 6: Install the New Filter

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Remove the new LG LT120F charcoal filter from its packaging. Position it in the filter housing, ensuring it sits properly. The filter should slide into place easily. Make sure it’s oriented correctly – most filters have an arrow or marking indicating the correct direction.

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Step 7: Replace the Cover

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Carefully replace the filter cover or grille. Ensure it sits properly and is secured. If it has clips, make sure they engage. If it has screws, tighten them securely.

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Step 8: Test Ventilation

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Plug the microwave back in or turn on the circuit breaker. Set the microwave to recirculating mode (if it has this option). Turn on the ventilation fan and verify it operates properly. The fan should run smoothly and air should circulate.

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Replacement Schedule

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Charcoal filters should be replaced:

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Every 6 months for heavy use (daily cooking)
Every 12 months for light to moderate use
Immediately if you notice odors aren’t being removed
When the filter appears heavily discolored or saturated
As recommended by the manufacturer

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Note: Write the installation date on the filter or set a reminder to replace it regularly.

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Understanding Filter Saturation

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Charcoal filters work by absorbing odors and particles. Once the charcoal becomes saturated, it can no longer effectively filter the air. Unlike grease filters, charcoal filters cannot be cleaned – they must be replaced. A saturated filter will not remove odors and may actually release trapped odors back into the air.

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Troubleshooting

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If odors persist after replacement:

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Verify the microwave is set to recirculating mode (not vented mode)
Check that the filter is properly installed and seated
Ensure the filter cover is properly secured
Inspect the ventilation fan for proper operation
Consider if the grease filter also needs cleaning
Check that the filter is the correct type for your model

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Vented vs. Recirculating Mode

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Important: If your microwave is vented to the outside, you don’t need a charcoal filter. The charcoal filter is only used when the microwave is set to recirculate air back into the kitchen. Check your microwave’s ventilation settings to determine which mode you’re using.

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When to Call a Professional

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This is a simple replacement that doesn’t typically require professional help. However, consider professional assistance if:

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The filter housing is damaged
The ventilation fan isn’t working properly
You’re unsure about your microwave’s ventilation mode
Multiple components need attention

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← Back to Top 20 Microwave Models & Common Repair Issues Guide

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