Ok so I dug into the dash expecting to find broken blend doors or something but the blend doors work just fine and so does the motor??? So now I'm at a loss... does anyone know any other possibilities of this symptom? "Heat on Pass side no heat on drivers"

When I moved the two blend doors manually they moved just fine and thump into place nicely, didn't hear any rattling or crazy noises. They seem perfectly fine but the way I understood it those are really the only possibilities of this particular symptom??

 

This is the normal temp. Just to the left of the center line on the gauge.

 

Did you activate them with the controls to see how they move when hooked up like normal?

 

I'm having a similar problem with mine. Heater hoses are hot, new thermostat and radiator. Vents blow hot air for 3-5 seconds and then go cold.