Odd behavior in HVAC system.

[72BroncoSand]

I noticed it would randomly disable the recirculate button allowing fresh air to enter increasing the blower velocity. if you then hit recirculate button it would resume previous setting. I only noticed the fresh air vent opening because wildfire smoke was thick outside. Mmmmm…..

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[jd-ford-hd]

Actually the highly sophisticated "voice recognition" feature of Sync 4 can detect the audibles created by flatulence and will initiate the required air circulation to accomplish mitigation.!

 

[69 Mach I]

Mine does that exact same thing at highway speeds. My first vehicle with automatic climate control, so wasn't sure if that was normal......I guess it is for the Bronco!

 

[GoTigersGoBronco]

I have this happen in dozens of vehicles. I usually attribute it to the automatic climate control.

 

[22OBX]

Reviving this thread from the dead. I just took delivery and the very first thing I noticed when turning on the ac the damper door didn't sound right. Made a loud sound and opening and closing sound like it's searching for the correct point, and in my past that has always pointed to bad damper motors. I threw it on Forscan and sure enough - 10 miles, I have a DTC - NO CEL but for a 1083B - Recirculation Damper Motor. Additional Fault Symptom - Mechanical Failure. Going in this week and I will post back the outcome.

 

[Leo-Bronco]

Reviving this thread from the dead. I just took delivery and the very first thing I noticed when turning on the ac the damper door didn't sound right. Made a loud sound and opening and closing sound like it's searching for the correct point, and in my past that has always pointed to bad damper motors. I threw it on Forscan and sure enough - 10 miles, I have a DTC - NO CEL but for a 1083B - Recirculation Damper Motor. Additional Fault Symptom - Mechanical Failure. Going in this week and I will post back the outcome.

Sooo any outcome? Lol

mine does the same at hwy speeds sometimes starts blowing hard for a little while.

 

[Leo-Bronco]

Anybody has fixed or has dealer said anything?

 

[JeffROK]

Anybody has fixed or has dealer said anything?

From what I understand, it's built into the system. It's apparently not really a good idea to keep recirculating the air for too long, so it's just replacing the air. Here's a more thorough explanation: https://www.autocornerd.com/air-recirculation-in-the-car-keeps-turning-off-automatically/

 

[22OBX]

Sooo any outcome? Lol

mine does the same at hwy speeds sometimes starts blowing hard for a little while.

Sorry, thought I posted back. Has been working fine with no odd behavior since replacing the motor. I haven’t noticed any of the symptoms of it changing on its own. It seems to stay on when I turn it on and goes off when I turn it off. I do think there may be a function or two if selected, that recirculation mode is not designed to work in, so it turns off. Maybe defrost, I can’t remember and would have to test.

 

[Area51BS]

It’s an obnoxious Ford feature. If outside temp is in range. The vehicle will allow outside air in. I think it stems from some past lawsuit. My Maverick and Bronco Sprort do it.

 

[22OBX]

It’s an obnoxious Ford feature. If outside temp is in range. The vehicle will allow outside air in. I think it stems from some past lawsuit. My Maverick and Bronco Sprort do it.

Interesting haven’t noticed that.

 

[Area51BS]

Interesting haven’t noticed that.

In Florida winters around 50 degrees and at dark is only time I see it. Will see this winter. Haven’t seen it since last winter.

 

[Leo-Bronco]

Interesting haven’t noticed that.

It’s an obnoxious Ford feature. If outside temp is in range. The vehicle will allow outside air in. I think it stems from some past lawsuit. My Maverick and Bronco Sprort do it.

For me it seems to be more related to my driving speed then temperature. Yesterday it happend again when i hit 85mph+. Temperature outside was around 75f. I had only been driving like 10 mins.

 

[Ksjrb03]

The blend door that allows outside air in opens even when you have it on recirc. This is a Ford feature to allow “fresh” outside air in even if you don’t want it. The door is located in a space that allows it to flow in faster than the fan would do on its own on low settings. That’s why you notice it more when driving faster. Super annoying.

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