Cant turn off red light on microwave ge - Microwave Ovens

Press the reser filter button and hold for at least 3 seconds to turn off.

It comes on every six months to remind you to change the filter. (Even if your over-the-range microwave is direct vented and doesn't have a filter.)

If you DO have a filter, it's time to change. Its located in a small compartment above the cavity. Push on the filter door where it states "push" to access the filter.