My son has a 2020 kfx 50 4 wheeler. I tried to start it the other day and the key was frozen. I thawed it with a hair dryer on low until the key would turn. It won't start or even try to turn over. The batter is 12.5 volts so I believe it's good. I have a battery maintainer on it. The kill switch is in the start position. The one in the back in plugged it. When I turn the key the back brake light dosent even come on when I try to start. Any help would be greatly appreciated.