Originally Posted by Florida Girl

Hello,
I think one side of my heater duo valve is not functioning properly.
Have to assume only one side is working properly since when the air conditioner is on, the driver side center vent blows hot. Just had a new compressor installed. So I know that's all good
It did however cool down somewhat when I turned the temperature selector from full cold to full hot..........very odd. I would think the opposite would happen.
Are the valves closed by default until heat is demanded from the control panel?
I tried pulling the plug connector and reattaching. I can hear and feel the click. Just can't tell if one are both are moving.
I also checked the heater hoses coming out of the valve with laser temp, one is hotter than the other, the left side as facing forward.
I'm not sure how to test the OHM resistance across the coils, any instruction is appreciated.
Or in leu of all this. Is it best to just replace the valve assembly?
Regards,
Florida Girl's...... Hubby home mechanic.