Thus, Why is my car blowing hot air on one side and cold on the other? Due to the design of dual AC systems, low refrigerant is the leading cause of drastic temperature difference from one side of the dash to the other. Even well experienced car mechanics may be surprised to learn that as little as 4 to 8 ounces undercharged of 134A can make such a huge difference.
Additionally What controls the blend door actuator? Most vehicles use an electric motor actuator to control the position of the blend door (though, some use a mechanical cable instead). Depending on the system design, there may be just one blend door actuator or multiple blend doors and actuators.
How do you bypass a blend door actuator? 
How do you test a blend door actuator with a multimeter? 
How do I know if my blend door is stuck?
Is blend door open or closed for heat?
There are just flaps inside the ducts, called blend doors, operated by vacuum motors, that open and close to allow heat or stop heat from coming through the vents into the passenger compartment.
What is the difference between a blend door actuator and a mode door actuator?
The blend door actuator is typically located closer to the heater core and evaporator than the mode door. Mode Door Actuator: The mode door actuator controls which vent(s) air blows through. The door on this actuator has two positions: closed and open. actuator is a clicking noise when the A/C system is on.
Where is the reset button on my HVAC unit?
Look for it first around on the exterior of your machine, especially along the bottom edge near the ground. An AC’s reset button is typically red and visible, so it should be easy to spot. If you don’t see a reset button on the outside, it could be located inside the unit behind the service panel.
How do you manually reset a thermostat?
Reset the Thermostat Common methods for resetting a thermostat include installing the battery backward for five seconds, pushing a recessed reset button with a pin or paper clip, or shutting off the breaker to the thermostat for 30 seconds.
Do heat pumps have a reset button?
Press the Heat Pump’s Reset Button or Power Switch Begin by turning the power off to the heat pump. You will need to reset both units by pressing the buttons or flipping the switches. If your heat pump does not have a reset button, it will have a power switch.
Where is the reset button on a thermostat?
Where is the reset button on my furnace?
Locate the reset button on the furnace and press it to reset the furnace. It is usually located inside the blower compartment on the side of the blower motor. Be cautious as the housing may be hot. If the button is popped up, press it down.
How do you reset thermostat after changing filter?
How do you reprogram a thermostat?
Can you unstick a stuck thermostat?
It’s inexpensive and a fairly straightforward process. In short, you need to drain your coolant, disconnect the housing, remove the current thermostat, put in a new one, reconnect the housing, then refill your coolant line. In this guide, I’ll tell you exactly how to unstick the thermostat in your car.
Which actuator controls the defrost?
What does the actuator do? The blend door actuator decides whether the air is going to come through the mid-vent, floor vents, and control defrost, and so on. Some cars have a dual blend door actuator that enables the driver to control the climate in different time zones.
How do you test door actuator?
What is the difference between blend door and blend door actuator?
The blend door can open and close at various positions to block or allow air passing through the heater core in order to achieve the desired temperature inside of the vehicle. The blend door actuator is typically located closer to the heater core and evaporator than the mode door.
How many blend door actuators does my car have?
Most vehicles have two blend door actuators, one on the driver side and one on the passenger side. Fortunately, you do not need to remove the dashboard in order to get to them. Some experts recommend that you disconnect the vehicle’s battery to remove and replace the blend door actuators.
How do you fix a blend door?
