I tried to search around so please forgive me if this is a commonly asked question.

I have a 2011 Ff150 crew cab. Sometimes after cranking my truck the a/c will not blow unless I hit a bump just right or hit the dash with my hand just right. Once it works...it works. Sometimes I crank up and it does fine. Other times I get nothing and have to hit a bump. When I reach highway speed I can feel cold air leak out of the vent, but it's not blowing. I have seen ppl having trouble with their blend door actuator. Would that be the problem here? Or something else? It does not have dual climate zones if that helps you.

 

More likely a blower motor that's going out or a loose/corroded connector.

 

I bet thats it! I located it underneath the dash. Sort of tapped on it and it started trying to work. Is there a way to determine of its the blower, connector or perhaps both?

 

If you tapped on it and it started to work, it's most likely the blower motor itself.

 

Yes, it's the blower motor.