Decided to take the '49 out yesterday for one last spin. I installed a regulator valve for the fresh air heater a while back and noticed yesterday that the heater never really blew out warm air. Just cool air no matter where I turned the knob on the valve. Did I do something wrong on the install? Hoping someone might have an idea. Thanks


My truck: She may not be the prettiest girl at the dance, but she's all mine!