AC/Blower-Fan Starts Up Indiscriminately

[HorsewNoName]

Thought it was me accidentally hitting the start button just forward of the shifter. I was sitting at idle and it just started several times after shutting it off. I have heard of similar stories. Thoughts/Inputs? Thanks!

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[TBone4Eva]

Thought it was me accidentally hitting the start button just forward of the shifter. I was sitting at idle and it just started several times after shutting it off. I have heard of similar stories. Thoughts/Inputs? Thanks!

Was it particularly humid that day? I believe the truck has a humidity sensor and will auto activate the A/C to bring the humidity level down to help keep the windows from fogging up.

 

[HorsewNoName]

Was it particularly humid that day? I believe the truck has a humidity sensor and will auto activate the A/C to bring the humidity level down to help keep the windows from fogging up.

Yesterday the high was 74 deg/F, 84% humidity. Nice breeze, sunny, all windows down. Typical coastal marine weather here.

 

[Sauce]

Longshot, but was there any voice recognition going on? My AC modulates if I'm talking on the phone or using voice commands etc.

 

[HorsewNoName]

No talking, parked at idle. I had just installed a Rubigrid (Bulletpoint) molle in a new dashboard tray, referred to as a "finish panel" and had to give it a little pop for the new clips to engage. By all means not a major thump. Thanks

 

[TBone4Eva]

Yesterday the high was 74 deg/F, 84% humidity. Nice breeze, sunny, all windows down. Typical coastal marine weather here.

Even though the temperature is not high, 84% relative humidity is pretty high. I tried looking up what the threshold for humidity is, but can't find one. I guess Ford's system calculates it on the fly. The name of the system is Enhanced Windshield Anti-Fogging Strategy (EWAFS). There doesn't seem to be a way to disable it, but there were some options offered in the following thread:
https://www.ranger6g.com/forum/threads/disable-automatic-a-c-activation.10683/

 

[HorsewNoName]

Well TB, you are spot on. I notice that 84% RH was unusually high for these parts. I guess in some ways the sensor is an advance warning weather device as today is less RH but extremely uncomfortable, this all is owing to a tropical Mexican monsoonal front coming in from the south which is typical for this area. I did verify that the 2020 Ranger has the device. Thanks for pointing me to the right direction as I found out more below. Thanks again and over and out.
2023: EWAFS (A/C turning on when you don't want it) Defeated - Ford Truck Enthusiasts Forums

 

[RANGER PRIDE]

Im assuming the AUTO button on the console is also on for this?

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