Weak cold airflow from vents and no heat?

Hello,
Are you able to change the fan speed? Can you hear the blower motor pick up speed / increase in noise when changing the fan speed? If you are getting weak airflow please make sure that there is a proper seal with the blower motor and the HVAC case. Make sure you cannot hear any air escaping in that area. With the car not running, you can change the temperature / mode controls and listen to the HVAC actuator operation, and possibly note an issue. What you describe may end up being a broken HVAC door if all else seems good.

William

Fan speed changes accordingly. No airflow leaks on HVAC housing. With the engine off, I am able to hear the operation of the Blend Door Actuators. Airflow changes from footwell to windshield to center vents accordingly. But when changing from cold to hot, there is very little heat felt. And even though on cold the airflow feels cold, it is very very weak. Any chance it could be the Actuator that controls Heat/Cold? Or would it be the door itself?

If you can hear the blower changing speed and the actual force of the air coming from the vents is minimal, it is likely a door has broken or something (like rodents) have interfered in the operation of the HVAC unit.

William

I will remove the Actuator and check if I'm able to move the door by hand. Thanks.

It sounds like the mode actuator is not working here is the location. This is a common problem. Check out the images (below). Let us know how it goes

Is the mode actuator on the driver or passenger side?

Also do you know which of these parts would it be?

It says to remove the instrument panel so I am going to say it is on the left side. I would go with the motor craft part. Make sure it says "mode" for the actuator.

So I changed the mode Actuator on the driver side and I didn't have remove any panels or dash pieces at all. I just had to reach up above the brake pedal. The mode actuator (lower one) was not moving at all when changing the temp from cold to hot and vice versa. I installed the new one and now it does move when the changing the temp. The other actuator on the driver side (above Mode Actuator) and the one on the passenger side, both work fine and move as they should. However, the airflow is still weak even when the fan is set to highest. Will the problem be a physical obstruction in the ducts? Thanks.

It is possible there is a physical obstruction yes. Many times I've seen mice create homes inside the hvac unit, and there have been occasions where the insulation was pulled in by the blower, chopped up, and sent out as a ball into the unit. You may have to remove the blower and see what comes out, or run your hand as deep as possible to check.

Hope this helps,
William