At first I got a defective heater, and I left a bad review. I promptly got an message from the company trying to help make things right. After a few messages back and forth (over the span of a few days), they sent me a new heater. I reinstalled it, and after running the first test, it works great! On the lowest setting it heat my van up 4 degrees Celsius in about 5 minutes! Super stoked now that it_ working, and definitely will update after using for a while!