Just came in from plowing snow and my 570 Ranger leaked some coolant. The fan was running, and I let the engine run while I was doing something else, and then the engine died. I got back in it, cranked it and the temp light was on at 201 degrees and the fan started running. So, I thought I would get it back to the garage and it barely ran to go back. When I moved it, I noticed coolant on the snow, so when I got it back in the garage, I checked it and it had overflowed coolant around the radiator. I also noticed the top radiator line was hot/warm and the bottom radiator line was cold/cool. Is this the thermostat that is bad?