Loud fan

[Johnny Cee]

I cant seem to find an answer. I have a 2013 First Gen woth 85,000 and when the AC is on the fans are loud. The fans only kick on when I have the ac on, when the ac is off the fans are off. Is this typical for the first gens?

I bought my truck in October when I didn't need the ac on but all summer its just been annoying.

 

[CoronaRaptor]

There is a fan switch with different speeds so you can select. If you are in auto mode and have the climate control off and then push the a/c button and its warm inside the cab, the fans will come on at high speed most likely. If you can't adjust the fan speed, then the fan resistor is most likely shot.

 

[FordTechOne]

I think he's referring to the radiator fans. Yes, it is normal for the high speed fan to come on when the A/C is on and it's hot out.

 

[Johnny Cee]

Well the fans come on high even when the ac is on low and the temperature isn't that high.

 

[CoronaRaptor]

Well the fans come on high even when the ac is on low and the temperature isn't that high.

Have you tried cleaning your radiator? I cleaned my sons radiator and there looked to be about 5 lbs of dirt come out of it (outside). It takes a lot of rinsing and soaking to dislodge the dirt. Mine never runs on high speed unless the outdoor temp is above 90f. I could count on one hand how many times i've heard the high speed fans come on in the last 11 years. I think the temperature probe is on top of the rad support. I might go take a pic, maybe yours is toast or has been relocated.

 

[CoronaRaptor]

Pics, maybe @FordTechOne can verify:

 

[CoronaRaptor]

So how does your engine stay cool if the fans never come on except when the A/C is on, I bet the low speed fans are on and your just not hearing them, otherwise you would overheat.

 

[FordTechOne]

Pics, maybe @FordTechOne can verify:
View attachment 320404View attachment 320405

That’s a blunt cut wire, the fan is controlled by the PCM based on the Cylinder Head Temperature (CHT) input.

 

[CoronaRaptor]

That’s a blunt cut wire, the fan is controlled by the PCM based on the Cylinder Head Temperature (CHT) input.

Oh, I thought it was like a thermistor, my bad!

 

[CoronaRaptor]

OP, have you checked the A/C pressures, maybe a bad switch or system is overcharged? Is there any stickers under the hood where a tech might of added or replaced freon in the system.