I had the same exact problem a while back, have you noticed that your low gas idiot light doesnt come on either?
When i couldnt get my HVAC controls to work, i double checked my connections and there is a wire for the dash/HVAC controls that must be connected to the switched power going into the H/U... i just happened to miss it when i was wiring the kit... I'll take the evil oval out tomorrow and snap a pic of what i'm talking about....
IIRC its an orange wire..... but dont quote me on that... till i have a pic...
BTW... i too have the scosche kit....