[garagemethods]

So i asked this over in the audio section and not really getting many answers so i though maybe ya'll could lend a hand as well.

I recently installed an aftermarket navigation headunit and everything on it works perfectly, but after completing the install I turn on the car and get no air blowing on cold or hot.

The display shows that it's working but no matter what i push i get no air blowing. When i turn on the a/c though i can hear the vents open and what sounds like a compressor engaging.

Now heres the odd part, after a day or so i took the negative battery lead off then put it back on and then hit a bunch of random buttons on the a/c and it started working. it has now stopped again though.

Any ideas?