I have a 2011 f150 and when starting vehicle, there is a clicking under dashboard. Normally it’s stops after a few seconds, but now it’s continuously does it and heater stopped working. Any ideas where to start. This is a lariat with touch screen

 

Depending on where it is coming from, Could be one of the directional door motors stuck. See if you can pin down the area a little bit more.

 

It’s coming from the center behind the radio area. When this happens my heater doesn’t blow hot air. I’m sure it’s with the a/c system, just not familiar with them.

 

On some vehicles you may need to remove an under dash covering and on some you can look way up there and see what we are talking about.