Kubota easter eggs- Fuel tank full notification

[BTDT2]

I suspect everyone but me has figured this out, but in the past I have removed the front a/c condenser screen when mowing high grass, and used a whisk broom to clean it. It wasn't until my last oil change that I realized if you remove the right side engine access panel there is second removable screen that totally covers the radiator. Now I clean both of them when I see engine temp starting to rise.