Well, cleaning the duo valves didn't have an effect so back to the drawing board.
Originally Posted by
GraphiteGhost
: Turn both temp ***** to one detent from max cool, and feel the individual lines at the firewall. If the lines are hot as all gitgo, then the control head is not sending a full signal to the valves to close (after car is fully warmed up).
They are warm/hot to the touch but not so hot that I couldn't hold them.
Originally Posted by
GraphiteGhost
:
Of course, you made sure the duovalves coils are not burned out, right? Unplug them and check the continuity with a simple ohm meter.
I did. Both sides are coming in at 25.5.
Originally Posted by
GraphiteGhost
: After that, you can test if the head is sending a signal to them. You'll see a pulse (voltmeter jumping) according to the individual cabin dial settings.
I did that as well. Full cold is showing 12v across both terminals and full heat is 7.8 across both terminals as well.
Next stop is the blend door then the controls themselves next.