So I've had this issue for a week or so now and I'm slightly baffled. The air doesn't get warm in the car anymore. I have it on 32 on full and it's not even a little warm. Coolant is full, engine/water temp is just below middle (normal from experience?) and there's no leaks inside the car. It's like there's no water in the matrix. What's the easiest way to test things without removing stuff if that's possible?
Should I replace the thermostat?