even though the heater control valve in earlier cars had the valve in the heater box, it still effectively stopped water from circulating in the heater core, right? I'm pretty sure they moved the valve to the engine compartment to make servicing easier and to avoid collateral damage like antifreeze soaked carpets.
My 64 Valiant has NO heater control valve as I mentioned in post #2. The temperature is controlled by the doors in the HVAC box. There is NO valve that stops hot water flow.
Also, FWIW, we feel no heat whatsoever in the cabin. I totally rebuilt the heater box shortly after I got the car, so that may have something to do with it. Also, the fresh air doors and vents work very well, so I'm sure they make up for some of it possibly.
