Hopefully you paid through paypal cause if the seller doesnt want to help out and replace the bad HU, then you can file a claim with ebay and you might be able to get your money back. Also, if you paid with paypal and used a credit card just return the uit to the seller also using a tracking number and then you can go to your credit card company and tell them you want your money back cause the unit was defective and give them the tracking number and info to who you bought it from and you should get you money credited back to your card pretty quickly.
In this case I would say that this is just a bad HU that isnt working properly. If you buy a head unit that is out of an ford F150 (you can tell by the first four digits of the part number 8L3T, the first digit is the year and the L3T means it from an F150) and put it back into a F150 there shouldnt be any problems with everything working correctly. Its when you get a HU from another type Ford vehicle that you will have problems and reprogramming may not fix those problems.
