aftermarket for mine. coworker had his replaced at dealer twice in 3 years. his should have been Ford part but not gonna swear by it.

 

Mine simply had a partially defective blower switch ****! It seemed that the switch was bad but as it got worse, I turned the switch with a pliers and it was still okay. Replaced slightly loose **** that had a bad center. $15 bucks.

 

What is the EMTC module? I’ve replaced the following on my 2012 F150 and my blower still only works on level 4. I have a new resistor that’s installed. I bought an aftermarket fan and when that didn’t solve the problem I returned the blower. I just now installed a new Dash Control Unit and still, the fan only works on level 4. None of the connectors appear to be burned out. I even switched the relays under the hood to see if that was the issue. Any ideas?

 

@KnightRider
Yes, I had the same problem and this was the solution :-)