Panasonic Microwave Error Code FILT

FILT is a scheduled maintenance reminder indicating that the programmed air filter replacement interval has elapsed. It is not an error code signaling a component failure. The microwave's control system tracks operating time and displays FILT to prompt you to replace the grease filter and reset the reminder timer.

Technically the timer can be reset without replacing the filter, which will clear the FILT display. However, this is not recommended if the filter is due for replacement, as a grease-laden filter restricts airflow and reduces ventilation effectiveness. Skipping the filter replacement can lead to reduced exhaust performance and potential heat buildup over time.

The cost depends on whether you replace the filter yourself or hire a technician. Replacement grease filters for Panasonic over-the-range microwaves typically range from around $10 to $35 depending on the model and supplier. If a service technician is called to perform the filter replacement and timer reset, expect to pay a service call fee on top of the part cost, generally in the range of $75 to $150 total.

To clear FILT, you need to complete two steps: replace the grease air filter with the correct replacement filter for your model, then reset the filter reminder timer using the control panel. The specific button sequence for resetting the timer varies by model, so refer to your unit's user guide for the exact steps. Both actions are required to fully clear the reminder.

FILT is a maintenance reminder, not a safety shutoff, so the microwave will continue to operate normally. However, if the grease filter is heavily clogged, airflow restriction can reduce the efficiency of the ventilation fan and may allow grease-laden air to recirculate rather than exhaust properly. Addressing the filter replacement promptly is the best practice.