Weak airflow from HVAC vents

MFC6401

MEMBER
2004 CHEVROLET VENTURE
2WD
AUTOMATIC
130,000 MILES

The airflow from the front vents is weak to the point you basically have to put your hands on the vent to feel anything, no matter if I am using heat or the A/C. The blower has been replaced, the resistor has been replaced, and the cabin air filter has been replaced too. I am at a loss, could it be a blend door? The rear air blows strong as ever.

Thursday, January 13th, 2022 AT 8:33 PM

1 Reply

JACOBANDNICKOLAS

MECHANIC
110,114 POSTS

Hi,

The blend air door actuator is for temperature control. In this case, it sounds like you have an airflow direction problem. That is controlled by what is called a mode door actuator.

I attached a pic below showing the actuator I'm referring to. What I suggest is this. Remove the two bolts holding it to the HVAC box. With the wiring still connected, see if it responds when you select the vents.

Let me know what you find or if you have other questions. Note: The actuator is on the right side of the HVAC box under the passenger side of the dash.

Take care,

Joe

See pic below.

Image (Click to make bigger)

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Thursday, January 13th, 2022 AT 9:02 PM

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2000

CHEVROLET VENTURE