It’s Cold Outside

I live in Wyoming, and the highs have been hovering around zero. At these temps with my HD10 Cab, I cannot keep the cab warm. The engine temp very seldom even shows a bar on the temp meter, and cold air comes in the cab through the hole under the glove box tool kit, and under the driver’s side as well. Because of the engine temps, the heater blows only luke warm air. Does this thing have a thermostat, or has anyone added one? Anyone figure out how to stop the outside air that is coming in under the dash?

It’s Cold Outside

I live in Wyoming, and the highs have been hovering around zero. At these temps with my HD10 Cab, I cannot keep the cab warm. The engine temp very seldom even shows a bar on the temp meter, and cold air comes in the cab through the hole under the glove box tool kit, and under the driver’s side as well. Because of the engine temps, the heater blows only luke warm air. Does this thing have a thermostat, or has anyone added one? Anyone figure out how to stop the outside air that is coming in under the dash?