Ford crown victoria a/c problem

There may be several reasons for your issue. Check here for some of the most important: blower vents not switching
It could be an actuator(motor) that stopped working.

Here is a list of Crown Vic part:
List Blend Door Actuator 2003 Ford Crown Victoria Reilly Auto Parts

Here's an example of what may need to be done in a similar situation:
If you are handy, possibly buying a repair manual similar to this may help:

images for Where is the a.c. heater blend door ...

Fix Heat Door Actuator. - YouTube

? 6:17
https://www.youtube.com/watch?v=NkUPsacbYzc
Oct 7, 2012 - Uploaded by zephmont
My 2005 Crown Vic is blowing out a little heat at times but not how it normally does. .... actuator to press the ...

2003 ford crown vic Heat blender actuator fix - YouTube

I may be wrong since it has been awhile since I have had to do one, but if I am not mistaken the blend door motor is located on the back side of the air box against the firewall. The only way to access it is to remove the dash and the airbox from the vehicle.

try rechecking the blend door actuator and its connections, fuse, etc. also if your AC system is overcharged it will blow warm air.

P2106 - Throttle Actuator Control (TAC) System - Forced Limited Power Description: The TAC system is in the failure mode effects management (FMEM) mode of forced limited power. This DTC indicates the FMEM action is in effect due to a failure in an electronic throttle control (ETC) related component or module. Possible Causes:

• Unplugged motor, circuits shorted to power.
• TAC motor open, unplugged motor, circuits shorted to power.
• TAC motor stuck open or closed.
• Mass air flow (MAF) sensor fault.
• Throttle position (TP) sensor fault.
• Module communications network concerns.
• Manifold absolute pressure (MAP) sensor fault (Vehicles with an EGR system module [ESM]).
• Output shaft speed (OSS) sensor fault (Crown Victoria, Expedition, Explorer, F-150 4.6L and 5.4L, Grand Marquis, LS, Mountaineer, Mustang 4.6L automatic, Thunderbird, Town Car).
• Turbine shaft speed (TSS) sensor fault (Crown Victoria, Expedition, Explorer, F-150 4.6L and 5.4L, Grand Marquis, LS, Mountaineer, Mustang 4.6L automatic, Thunderbird, Town Car).
• Anti-lock brake system (ABS) fault (Crown Victoria, Expedition, Explorer, F-150 4.6L and 5.4L, Grand Marquis, LS, Mountaineer, Mustang 4.6L automatic, Thunderbird, Town Car).

Diagnostic Aids: This DTC is an informational DTC and can be set in combination with a number of other DTCs which are causing the FMEM. Diagnose any accompanying powertrain DTCs first. For Crown Victoria, Expedition, Explorer, F-150 4.6L and 5.4L, Grand Marquis, LS, Mustang 4.6L automatic, Thunderbird, and Town Car with only P2106, repair any ABS DTCs, ABS related DTCs in other modules or vehicle communication concerns using the appropriate section of the Workshop Manual. Application Key On Engine Off Key On Engine Running Continuous Memory All GO to QE1
P2106 TAC System Forced Limited Power 2004 Ford Explorer

Is there ground?

Is there power and ground at the actuator?

Is there power or ground in the circuit when the system is off but the vehicle is running (Indicating a short to power or ground)

This a 5.5 hr job, it is hard to replace the dash needs to be pulled, i just did one and not fun, customer would not have heat at times and it was blend door motor , this is located at the top of the heater box and you need to pull dash back to replace and it is still a little hard getting to one of the screws in the rear of the actuator, the heater box does not need to be removed but dash pulled out.

Probably the "blend door actuator" inside the dash..

It opens/closes a flap to allow air flow across
the heater core or the a/c evaporator.

Its basically an electric servo and position is controlled by the knob.

ned to remove the radio and look at the blend door actuator on top of the hvac box. the actuator goes bad and doesn't move the door from hot to cold. if you see the actuator moving but still no cold air then the blend door could be broken.

sounds like the temperature blend door is either jammed or the actuator is shorted ou. when the temperasture control is moved you should hear the door moving...my guess is you are not hearing that..the actuator would be attached to the heater plenum behind dash/glovebox area...becareful to test the correct one as there will be a fresh air actuator and a mode door actuator as well...you can determine which one is which by changing the positions on heater head from hot/col, floor/defrost, recirculate and fresh air settings..each setting will move its designated actuatror..the one not moving would be you temp actuator....have fun!