No, a countertop does not go behind a slide-in range. When you install a slide-in range in your kitchen, the countertop should extend from the sides and back of the range, but not behind it. Slide-in ranges are designed to fit between cabinets and have a slightly overlapping cooktop that rests on the countertop.
The reason for leaving the space behind the slide-in range open is to ensure proper ventilation and to avoid heat buildup. Slide-in ranges typically have a control panel at the front, and it's essential to have enough space for airflow and to prevent damage to the countertop material due to the heat generated by the range.
It's crucial to follow the manufacturer's installation guidelines when installing a slide-in range to ensure safety and proper functioning. If you have any doubts or concerns about the installation process, it's best to consult a professional installer or the manufacturer for specific instructions related to your particular model of slide-in range.