F150'ers please help me figure out why my 3-Button remotes will not remote start my 2015 XLT V8 5.0 anymore. It was working fine until I took it to a mechanic to fix my AC but they said that they didn't disable anything. When it was working all I had to do was press the lock button twice. Any advice is appreciated

 

If you have a check engine light it will not allow the remote start. Also sometimes its finicky regarding how many times you press the lock button. Sometimes pressing twice or more before trying the remote start feature will cause it to beep the horn and not start. Also if you have the hood open or a door ajar.