A/C always on at startup

[kaz1961]

When I start up my new 2026 I noticed that the a/c is always on even if it was turned off when the engine was stopped. I checked the manual and there is no reference to this. Is that normal, never seen that happen in another car.

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[icegradner]

If you look at the bottom of the page it shows at least a number of threads that cover this question. Hope you find the answer there.

 

[hpz937]

It seems to turn on based on temperature. This morning it was about 60 degrees and the ac was off. As I was driving the temperature rose enough that the ac switched on automatically.

 

[kaz1961]

Hmm, I searched ac and none of those came up.

 

[Glen Baker LLC]

It seems to turn on based on temperature. This morning it was about 60 degrees and the ac was off. As I was driving the temperature rose enough that the ac switched on automatically.

For clarification you had the system ON using the fan for air circulation, but the actual AC was turned off.

What was the temperature set at?

 

[hpz937]

For clarification you had the system ON using the fan for air circulation, but the actual AC was turned off.

What was the temperature set at?

system set to auto and 72f. AC was off when I started the truck and turned on about half way on my drive

 

[Glen Baker LLC]

system set to auto and 72f. AC was off when I started the truck and turned on about half way on my drive

In the situation you described above. I would absolutely expect the AC to turn on.

 

[kaz1961]

Was reading the other threads and tried this. I started the truck and the ac was on, temp was set at 68 where I had left it. I turned off the ac and raised the temp to 80 and shut the truck off. When I restarted it the temp was still set to 80 but the ac was back on. Maybe its a humidity thing as suggested in the other thread?

 

[Master Blaster]

If the humidity is too high in the cab, then the a/c is turned on to dry the air. Why is the humidity so high in your cab?

 

[HeyBales]

Here ya go.

Don't let those with pre-25MY that didn't catch you have 25/26 confuse you.
They are different systems.

https://www.mavericktruckclub.com/f...v-to-stop-turning-on-the-ac-at-startup.86267/

 

[Glen Baker LLC]

Here ya go.

Don't let those with pre-25MY that didn't catch you have 25/26 confuse you.
They are different systems.

https://www.mavericktruckclub.com/f...v-to-stop-turning-on-the-ac-at-startup.86267/

I acknowledge the difference in controls.
I think in the situation @hpz937 described.

system set to auto and 72f. AC was off when I started the truck and turned on about half way on my drive

Any the model years. The AC compressor would operate the same. Body heat and any sun warming up the interior AC kicks on.

 

[commadorebob]

I live in Central Alabama. The A/C can turn off?

 

[Randorita]

I want my a/c on! NW Mississippi is HOT! Leave it on the temperature you are comfortable with and don't worry about it. If winter ever gets here, the heat will come on.

 

[lewiskauffman]

2022 XL. If I turn off the AC before shutting off the ignition, the AC stays off when I start the truck the next time.

 

[HeyBales]

I acknowledge the difference in controls.
I think in the situation @hpz937 described.

Any the model years. The AC compressor would operate the same. Body heat and any sun warming up the interior AC kicks on.

Yes.

I was merely warning - because that other thread has some confusion too between model years.

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