After removing the heaters...
I removed the front and back heaters. As far as I understand, it was helping with defrosting the front windshield and providing coolant for the engine in the back.
1-) Front: May I leave it without looping the pipes? If yes, what are the cons of it?
2-) Back: Does shutting the valve enough to provide coolant for the engine, or should it be looped back for engine to work properly?
Thank you very much.