I bought the corksport stereo installation kit and have been having issues with it since i installed it.

originally my heat did not work and neither did the display, after working on it today i finally now have the display working, although my heat doesnt. Everything is working otherwise, i can turn on the air, cycle through settings of where it blows and the display bar is working.

The only issue i cannot seem to fix is that it's only blowing cold AC and i cannot make it blow heat. has anybody else had this issue or any ideas on how to fix it?