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Most cars I am familiar with, the engine coolant circulates to the heater core (assuming the heater valve, if one is used, is open) regardless of the main thermostat.
Until the coolant warms up, not fully but say when the temp gauge starts to move, blowing cold outside air through the heater core will just make you colder as the air is moving. Once your temp gauge moves off the lower stop, there will be some heat available. I wouldn't turn the blower up much till the temp gauge is out of the "cold" region.
Not sure why this is a question. You can't get heat from cold coolant.
Not quite. There is a "built in" bypass that lets coolant flow all the time. Different places and different types on different vehicles.
Yeah? Good to know. Looks like I learned something new today, gracias.
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