Heater temperature blend door stuck hot positions

that is real easy , but the tests take skill sets.

1. the drive motor is bad, (actuator )
2. the wrong actuator used or installed wrong.
3. the controller to it is bad.
4. the blend door is jammed. (we turn it by hand to learn that)

stuck in heat mode, blocking AC. cool. sure.
a very common problem
some after marked actuators are junk, is common.
scan the OBD2 port for HVAC errors yet?
check all fuses first?



https://www.rockauto.com/en/catalog/ford,2010,fusion,3.5l+v6,1444313,heat+&+air+conditioning,heater+air+door+actuator,10721



Try motorcraft or SMP brands, on this car. SMP is what I use.

a JURYRIG:
now one skill lots of DIY guys do even all hot summer
they remove the blend door actuator and then hand spin it
to full closed ,casing max COOL to happen and does.
then keep it there somehow, if will not stay there until winter.
I call it the hillbilly fix. (with love )
motor craft says
(get door A closed) receirc
get B , bend set to block heater core
get C mode as you want, dash/vent/floor.
B can be forced on some cars easy,
the bend door has axle shaft and and adaptor cupling on some
that make it easy to hand turn the axle and to even bailing wire hold it if need be..
or dig my hack #2
take the old actuator and rip it all apart and jam it to cold.
then put it back in, with cold max, HACKED.
and last hint #1
some AC the Actuator must relearned. as the service manual so directs.

Does the vehicle have dual zone climate control, where the driver side and passenger side have different control? Sounds like a blend door issue on the driver side. Why did you replace the passenger side, was it blowing hot too when AC was on?

Blend Door Actuators not working properly. The doors open and close to blend hot or cold air.

https://www.google.com/search?q=2007+jeep+grand+cherokee+blend+door+actuator+location

..

I assume this truck has daul zone heating and a/c, the air blows but is not hot? if this is the case then you may have dissconnected the blend door actuator or it just went bad. this is common that the actuator goes bad,
there are two seperate actuators that control the hot/cold door in the heater box this way the passenger and driver can set there on temp.
the actuator for the drivers side is locted on the drivers side under the dash on heater box, the blower is on the passenger side , you can check connections but i do not think it is that but rather the actuator.

If you are getting heat on the driver's side but not on the passenger side, then you either have a defective or stuck passenger blend-air door actuator or a broken blend-air door.

TRY THIS FIRST: Sometimes the door and/or the catuator is just "stuck" from being in the cold position for so long during the hot months while you are using your air conditioner. I have gotten several of them working again by simply turning the temperature control to FULL COLD, wait about a minute, then turn it to FULL HOT again. You may have to repeat this a couple times to get it working correctly.

If this does not work, you will have to find out if the door is broken or if the actuator is bad and repair accordingly.

first, check under te hood to see if the heater core water hoses are hot going in and coming out. If hot going in but cold coming out, water valve (if you have one) may not be working.
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Control System Outputs
The air management doors are controlled by vacuum control motors (18A318) and an A/C electronic door actuator motor (19E616). The air inlet and distribution doors are controlled by vacuum control motors. The temperature blend door is controlled by the A/C electronic door actuator motor.
The A/C electronic door actuator motor provides a variable number of temperature blend door positions. Temperature control position energizes the A/C electronic door actuator motor moving the temperature blend door.
Vacuum control motors are used on both air distribution and air inlet doors. The air inlet and panel/defrost doors use a two position vacuum control motor. The floor duct/panel door uses a three position vacuum control motor. Vacuum control motors are controlled by engine vacuum through the climate control head.
For more information on the control components Section 412-04 .
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Air Management Doors
The air management doors are controlled by vacuum control motors (18A318) and an A/C electronic door actuator motor (19E616). The air inlet and distribution doors are controlled by a vacuum control motor. The temperature blend door is controlled by the A/C electronic door actuator motor.
The A/C electronic door actuator motor provides a variable number of temperature blend door positions. Temperature control position energizes the A/C electronic door actuator motor moving the temperature blend door.
Vacuum control motors are used on both air distribution and air inlet doors. The air inlet and panel/defrost doors use a two position vacuum control motor. The floor duct/panel door uses a three position vacuum control motor. Vacuum control motors are controlled by engine vacuum through the climate control head.
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Section 412-04: Control Components - Climate Control 1997 F-150, F-250 Workshop Manual
REMOVAL AND INSTALLATION A/C Electronic Actuator
Removal

1. Remove the floor duct panel.
   • Remove the two plastic push pins (one each side) and release the expander clip.

1. Remove the RH instrument panel brace.
   1. Remove the lower nut.
   1. Remove the upper bolt.
   1. Remove the brace.

1. Remove the LH instrument panel lower nut and position brace out of the way.

1. Disconnect the vacuum harness from the vacuum actuator.

1. Remove the floor duct.
   1. Remove the two screws (one each side).
   1. Remove the floor duct.

1. Remove the panel/floor door vacuum control motor.
   1. Disconnect the vacuum line connector.
   1. Remove the two panel/floor door vacuum control motor screws.
   1. Slide the rod out of the door and remove the panel/floor door vacuum control motor.

1. Remove the electronic actuator.
   1. Disconnect the electrical connector.
   1. Remove the three screws.
   1. Pull down to release the actuator shaft and remove the electronic actuator.

There is a blend door problem.

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HEATING AND AIR CONDITIONING Refer to Section 1 for discharging and charging of the air conditioning system. The heating system provides heating, ventilation and defrosting for the windshield and side windows. The heater core is a heat exchanger supplied with coolant from the engine cooling system. Temperature is controlled by the temperature valve which moves an air door that directs air flow through the heater core for more heat or bypasses the heater core for less heat. Vacuum actuators control the mode doors which direct air flow to the outlet ducts. The mode selector on the control panel directs engine vacuum to the actuators. The position of the mode doors determines whether air flows from the floor, panel, defrost or panel and defrost ducts (bi-level mode).

You may have a bad temperature door actuator motor on the drivers side. The actuator is what moves the temperature blend door and when it fails it usually moves the door all the way to the "hot" position. Sometimes if you shut the vehicle off for a bit then restart it the system will work fine for a while then the actuator will again swing the door all the way open or shut. I've replaced several of these actuators [both drivers side and passenger side] for similar problems.

Cold on drivers side and heat on passengers side, actuators working properly and blend doors are moving. Heatertreater is for piece of plastic on actuator motor. I moved blend door by hand after disconnecting actuator and works fine, both sides freezing when moved in opposite direction.

If you have good heat on one side, it can't possibly be the the thermostat. Good heat on one side means that there is plenty of hot water (water and antifreeze mix) circulating through your heater core. The thermostat controls the temperature of the water. If you have hot water, the thermostat is not at fault. Your Impala is equipped with what is called "zoned climate control". All the inside air (both sides) is still heated by the same heater core. The difference between a "zoned" system and a conventional system is that there is more than one "blend-air" door insided your HVAC housing. The blend-air door swings back and forth to direct the incoming air either through the heater core (for hot air) or around the heater core (for cold air) The drivers blend-air door may be broken or the motor that moves the blend-air door is malfunctioning.