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Old Dec 17, 2022 | 11:53 AM
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2011 f150 ecoboost 3.5. When ac is on fans are on coolant temp around 190 to 197. When no ac 200 to 215. When ac is off electric fans will not kick in until 215f. Is this normal?
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Old Dec 17, 2022 | 04:12 PM
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Fans turn on when A/C is active.
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Old Dec 17, 2022 | 05:08 PM
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Originally Posted by 13fx4150
Fans turn on when A/C is active.
fans also turn on when Truck hits a certain temperature. I though it would be under 215f.
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Old Dec 17, 2022 | 07:20 PM
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No, it is not normal. (unless exterior temps are over 90) Something is not quite right in your ac.

I should say....what you described with the ac off is normal. But not where the fan is always on with the ac.

Last edited by Spiky; Dec 17, 2022 at 08:52 PM.
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Old Dec 18, 2022 | 05:12 PM
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Weird, my EB will kick the fan on immediately after I turn on the A/C.
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Old Dec 18, 2022 | 07:59 PM
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Seems normal.
My 2013 5.0 is the same.

Thermostat is 195.
Fans will run when A/C or defrost is selected.
Normal temp runs between 185 to 207 depending on outside temperature and engine load.

At idle with A/C off, temp will rise to 210-215 before the fans kick on, usually low speed.

When outside temp is around 85-90, fans will go to high when A/C is on.

Fans should go to high with coolant temperature at some point, but I have never seen that on my truck.

The temperature gauge is a semi-idiot gauge.
It will read in the center of the scale from about 170 or so to some higher point.
I've seen 215 on my scangauge but the dash gauge reads in the same place as 180, and doesn't move.

Transmission temp gauge is the same way.
Center scale at about 150, and I've seen as high as 207 on my scangauge, but the dash gauge never moved.
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Old Dec 19, 2022 | 09:03 PM
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Originally Posted by 1968dave
2011 f150 ecoboost 3.5. When ac is on fans are on coolant temp around 190 to 197. When no ac 200 to 215. When ac is off electric fans will not kick in until 215f. Is this normal?
Yes, seems normal to me.

Originally Posted by Spiky
No, it is not normal. (unless exterior temps are over 90) Something is not quite right in your ac.

I should say....what you described with the ac off is normal. But not where the fan is always on with the ac.
Fans should pulse on/off as the AC cycles, which part doesn't sound right?

Originally Posted by N3UP
....

The temperature gauge is a semi-idiot gauge.
It will read in the center of the scale from about 170 or so to some higher point.
Yup.

Originally Posted by N3UP
...
Transmission temp gauge is the same way.
Center scale at about 150, and I've seen as high as 207 on my scangauge, but the dash gauge never moved.
Trans gauge is similar to coolant gauge, it doesn't hit center by 150 IIRC, i think it's closer to 170. But yeah, both coolant and trans temp are as close to idiot gauges as they get.

If you have the fancier cluster, you can see the actual trans temp by selecting that readout.



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Old Dec 19, 2022 | 11:13 PM
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Ok, I assumed the OP meant fans go to high whenever the AC is on. So, if we are talking about on low, that would be different. If it goes straight to high, that is not normal.
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Old Dec 23, 2022 | 07:04 PM
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Originally Posted by Spiky
Ok, I assumed the OP meant fans go to high whenever the AC is on. So, if we are talking about on low, that would be different. If it goes straight to high, that is not normal.
I think my two fans only have one speed. Both fans will turn on with ac on and if sitting idling when temp reaches 215f they turn on. I have never seen a difference in speed. When it hits 215f fans turn on and temp drops fast to 195.
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Old Dec 23, 2022 | 10:12 PM
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The fans are designed to be two speed. In low speed, they are connected in series so each is operating at half battery power. When the PCM commands them to do so, they are switched into a parallel powered configuration where both receive full battery voltage.

You'd have to get it a lot hotter than 215F for them to kick over to high speed operation.
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