Dash vents work, but not floor or defrost.
Air temp changes, hot to cold, in relation to temp control knob. That seems to rule out blend door problems.
I have checked all fuses that appear tp be related to air movement for continuity and tightness. Also pulled rotating switch, unplugged wire connector and re-inserted. (Did not check for current.)
Am assuming the problem is with diverter.
Have spent several hours reading all posts I can find relating to a/c problems.

Can diverter be accessed w/o removing dash as with blend door?

 

There is one motor for temp and one for mode. They are one the drivers side under the dash and I beleve it can be changed without pulling the dash. I have not replaced one in an hhr but I beleve that one is right next to the other.