I have determined it is the mode door actuator.
2012 f150 defrost door motor stuck un floor defrost.
You need to see if the mode door actuator is.
I won t change off defrost floor setting i replaced the blend door actuator and did not seem to help it my car has 56000 miles.
Temperature is ok the a c and heat both work and the blower responds at all 4 levels.
09 hvac vent selector stuck on defrost and floor only.
I have no air from the panel vents.
Guess the door was slightly slightly stuck since the defrost is used only on cold months.
My car has an automatic transmission.
This is a video about replacing the actuator that controls the defrost floor vents and not the hot cold blend actuator or the driver passenger ac actuator fo.
The gear was broken and the shaft was tuning in the gear instead of moving the hub.
I have a 2007 f150 fx4 which has a problem with the venting it seems to be stuck on dash vents.
When you switch to floor and defrost a small amount of air flows through them but most of air flow is s read more.
It only comes out of the defrost and floor vents.
My hvac switch is not responding to selecting between defrost panel floor vents in my 2009 focus ses 2dr.
Motor replace door actuator mode 10 2 hrs recirculation 0 9hrs temperature blend right 7 9hrs left 0 9hrs defrost b0 0 10 2 floor b0 0 10 2.
A climate control system can stop working after a battery replacement as the control prompt of the system is lost and needs to be rebooted by removing the defroster heater fuse for a period of time and then reinserted.
In some cases an electrical motor can burn out or the gears inside the actuator can break causing the defroster door to get stuck.