2002 F150 Lariat Supercrew 4x4
 

My power door locks are not working to unlock or lock from the buttons to the keypad on door or the key fob. I hear a clicking coming from under the dash which is coming from the anti-theft keyless entry module. I bought a new one but im wondering if i have to reset anything when i change this part? Also my A/C doesnt work. When i put it on max ac or regular ac it only blows through defroster? What could this be?

The A/C issue is probably a vacuum issue, when the system loses vacuum it defaults to the defroster. Check the lines and accumulator behind the battery. You have to remove the battery and tray to get at them.

Thanks i will check that.