Guys, i've noticed how cr@p the heater is in my Gti.
I've overhauled the cooling system in the summer with a new thermostat and housing, new head pipe connector, new metal pipe that wraps around the end/front of the engine, and a new radiator.
The heater is decidedly poor......even when the engine's nice and toasty.
Is there a positive shut-off valve for the heater like a 2-port valve?
MTIA!