Newbie tractor owner in MN. As of right now, I'm only using the tractor on weekends. This weekend was in the mid 20's temp wise. I started it up, let it run for 15 minutes before using it. I used it for a good half hour, and the heater only blew cool air, hardly any warmth at all. Wondering if something is wrong or are my expectations too high? I guess I was hoping the heater would throw out heat in the cold weather.