Air conditioning

2016 FORD EXPEDITION

41,000 MILES • 2WD • AUTOMATIC

REYDELEON1

MEMBER
2 POSTS

The A/C only works in the lower fan speeds. When I put it on Max A/C it turns on for about five seconds then shuts off. I have already replaced the resistor twice and the blower motor.

Jul 25, 2018 at 2:37 AM

JACOBANDNICKOLAS

✓Experienced Mechanic
110,246 POSTS

Hi and thanks for using 2CarPros.com.

Since you have already replaced the two components that are common problems, I need to know if you replaced the blower motor relay. I have attached a wiring schematic for you to review. If the relay can't handle the load, it may be turning off.

Here is a link which describes how to test a relay:

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

There are five pictures attached. The first is simply the relay location, and the others are the schematic from the relay directly to the blower motor and the entire wiring schematic for this system. They fall together in the order I have attached them. Take a look and let me know if you have questions.

I hope this helps. Let me know if you have other questions or need additional help.

Cheers,
Joe

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