We replaced our old dryer bc it was no longer heating. Neither us nor the repair man could figure out the problem. When we purchased this dryer and dried out first load we were disappointed bc the clothes weren’t very dry. My husband noticed an error code. It told us there was a blockage in the line. He found it, cleared it and we haven’t had any problems since then. The blockage was probably the reason our old dryer went out but we’re thankful to have had a smart device that diagnosed the issue when we couldn’t! Definitely a good feature.