We replaced our home Whirlpool microwave incandescent bulb with an LED, however it remains on indefinitely even in the off position. It has a low, medium, and high setting, and now an even lower setting...lol. Apparently it's a common issue with lots of speculation. Some say it's a control board issue and others say that there is a very slight current in the off position that can power an LED but not an incandescent. The bulbs are cheap enough so I would give it a try. Good luck.
Coast Guard Family
Old MH - 2000 Coachmen Santara 292SO
New MH - 2018 Coachmen Freelander 31BH