Issue with HVAC temperature sensor

[BlueJay]

Now that the weather is starting to shift towards colder temps here in the southeast, I've noticed an inconsistency with the cabin heat temps. The driver's side vents typically blow cooler air than the passenger side vents despite both temperature settings being the same and dual climate being turned off. However, if I increase the temperature setting by a few degrees, the drivers side will start blowing hot air as normal. I am aware of the common issue with the blend door actuator but this seems to an issue with a temperature sensor somewhere since the drivers side heat does work it just requires the temperature be increased. Am I ignoring the obvious in hopes it is not the blend door or has anyone else experienced this?

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[airline tech]

Normal Operation:

Dual Off, but were you still in (Auto)?

The system uses a - Overall Cabin Temp (Strategy) to satisfy the Humidity Temp Sensor (Small vent by your right knee)

Example: Both sides set at 72 Deg, the Pass side will push a higher temp to circulate (push the air over) to the Drivers side to generate an overall (selected cabin temp) of 72 Deg being that you have both sides set equal.
In this scenario - The Output Temp of the Pass side will be about 5 Deg higher than the Dr. Side

So about (approx) - 180 Deg Output - Pass / 175 Deg - Ouput - Drivers (Example)

When the Humidity Temp Sensor - determines that the overall cabin temp is 72 Deg, then the Pass / Drivers side output temps will equal out.

The Humidity Temp Sensor - is the system feedback for the system, the system also has 2 other temp sensors (output) sensors for the Foot & Panel, these 2 sensors are the feedback for the actual output temp (selected) and tie into the feedback of the Humidity Temp sensor.

For Ref: Check out my Thread on operation.

HVAC / Climate Control- Issues - Operation - T-Shoot and Breakdown | 2019+ Ford Ranger and Raptor Forum (5th Generation) - Ranger5G.com

 

[Cabose-1]

Put a thermometer in the vents. I did that and found at max ac passenger was at 48 driver at 69. So this is what ended up working for me. I spent about 30 minutes working on this

I had the ac on max cold. So....I turned the ac up not as seperate but both same temperature, I raised it all the way to max, 80 degrees I think is max, then as fast as it will go back to low. Waited about 10 seconds back to max 80 then back to low. I did it with the fan on max. Then the fan on low.

Now both sides work like normal. The doors needed to be reset??? The computer reset? Something jamming up the door? I don't know. But that's what I did and it is working fine now. Maybe work the same for heat?
That's all I got for you. Hopefully the fix is that easy.

 

[BlueJay]

Normal Operation:

Dual Off, but were you still in (Auto)?

The system uses a - Overall Cabin Temp (Strategy) to satisfy the Humidity Temp Sensor (Small vent by your right knee)

Example: Both sides set at 72 Deg, the Pass side will push a higher temp to circulate (push the air over) to the Drivers side to generate an overall (selected cabin temp) of 72 Deg being that you have both sides set equal.
In this scenario - The Output Temp of the Pass side will be about 5 Deg higher than the Dr. Side

So about (approx) - 180 Deg Output - Pass / 175 Deg - Ouput - Drivers (Example)

When the Humidity Temp Sensor - determines that the overall cabin temp is 72 Deg, then the Pass / Drivers side output temps will equal out.

The Humidity Temp Sensor - is the system feedback for the system, the system also has 2 other temp sensors (output) sensors for the Foot & Panel, these 2 sensors are the feedback for the actual output temp (selected) and tie into the feedback of the Humidity Temp sensor.

For Ref: Check out my Thread on operation.

HVAC / Climate Control- Issues - Operation - T-Shoot and Breakdown | 2019+ Ford Ranger and Raptor Forum (5th Generation) - Ranger5G.com

I just read through your entire post, which really explains a lot about the system. It seems that my "issue" may just be normal operation, though I don't recall it behaving in such a manner last year. Thank you!

 

[Msfitoy]

Blend door nightmare...

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