Share 'Heater Slider Not Working'

I have a 2008 Fortwo Passion Cabrio. I find that the heater core still puts out heat, even when the temp slider is pulled all the way downt to the cold setting. On a nice 5-degree C fall day, the cabin often gets unberably hot. Even in subzero weather it can begin to feel too warm on long drives. Thank goodness it's a convertible and I drive almost entirely with the top down during the summer. If…