Car ac actuator

We are a team of ASE certified mechanics that have created this guide for you so you can understand how the system works and what to look for when it doesn't. We also have included popular repair guides with videos which will help you stream line your repairs or see what you are paying for when taking your car in to a repair shop. Let's jump right in! When looking under the hood at your car's air-conditioner it might seem complicated but it's not.

Once you know how it delivers cold air you will see it's really quite simple. Your heater and air conditioner HVAC does three jobs; cool the interior of the car, heat the interior up and defrost the windshield.

All three modes work together as a complete system. The climate control system is controlled by a main computer which houses the controls for the system and sits in the dash in most cases. This computer gives commands to the compressor to start pressurizing the refrigerant along with the blend door actuators which direct air flow from the floor, mid and defrost vents. These air door actuators also control air temperature by mixing the hot air from the heater and the cold air from the AC.

When one part of the system fails to operate like the air conditioner then one part of the system stops working in this case the cold air. The AC system has four basic parts: A compressor, which is powered by the engine using a serpentine belt. On hybrid cars the compressor is electrically powered and does the same operation.

A condenser which is located in front of the engine radiator and cools the refrigerant from the compressor before it heads to the evaporator located inside the vehicle. This is where the high pressure liquid is released into the evaporator as a low pressure gas and where the coldness is created.

The blower motor then circulates the air throughout the interior. Start with the car on level ground with the transmission is park and the emergency brake set. The engine should be off, but warm. Wear safety goggles and gloves to protect against injuries.

Never loosen or undo any hoses or fitting before discharging the system of refrigerant. The system does contain a slight amount of oil which can be expelled while discharging.

You will see tools and supplies used in the following guides that you will be able to find throughout and at the end of this article, also a list of specific repair manuals. One thing to remember is all air conditioner systems work on the same principle. Okay, now that you have had a crash course on how the system works let's approach this problem like a mechanic would. Here is how to tell which; start the engine and turn the air conditioner on. Next, move the fan setting from the highest to the lowest.

If you can hear nothing it is a problem with the blower fan. If you can hear the fan but no air is forced through the vents, or if the air is being generated from the wrong vents this is an actuator problem. If air is blowing from the correct vents but is not cool no cold air - blowing warm air continue down the guide.

When the air conditioner is switched on three things begin to happens, the compressor, blower motor and vent actuators all receive an electrical signal to turn on. This causes the compressor clutch to engage while working the internal parts of the compressor pump.

This pumping action compresses the refrigerant so it can circulate around the system. The following step are presented in order of popularity. As your vehicle ages the refrigerant level should be maintained and added too insuring that the system stays full. Because this system is pressurized kind of like a tire it will need to be recharged as it ages. Recharging the system is not to difficult and can be done in about 20 minutes.

If the system is low then you can recharge and monitor how long the charge lasts. A sign of a system being low on charge is that it will produce white vapor from the vents much like your home freezer. This is because the pressure drop inside the evaporator is to excessive causing it to "ice up". To check the system's "state of charge", connect a gauge or charge kit to the low side hose service port to read the static pressure.Written by admin on April 23, Posted in Uncategorized. The AC actuator is located underneath the dashboard attached to air distribution doors in the hvac box.

The motors can move the doors into many different positions, or just two. There are three methods used in the automotive industry to operate the HVAC doors or flaps for distributing cars in cabin air. These methods are: Cable controlled, vacuum motor controlled, electric motor controlled or any combination of these methods.

On two-position doors, the control module activates the motor to move the door from one position to the other, depending on what the driver selects.

For instance, if the driver has the function selector set to outside air, the door will stay in the outside air position until the driver moves the function selector to recirculation air position. Once there, the door will stay in that position until the driver moves the function selector again. The cable type system, the driver controls the system manually.

The cables move the flaps as the levers on the head control set are moved. Early vacuum control systems used a vacuum control switch on the dash that, when operated by the driver, would direct engine vacuum to the corresponding actuator. Later vacuum control systems use electric switches, which send signals to a control module or controller, which in turn sends vacuum to the appropriate actuator.

Electric Actuator motors used in modern hvac systems can be one of four designs, the electrical functions and circuits are different in each vehicle, Depending on vehicle manufacturer, system design, year and model:.

The electric actuator motor consists of stators, slip rings, coils and a rotor, which contains permanent magnets. The actuator motor servo motor can be stopped at specific points in its armature with an accuracy of approximately 0. A tri state actuator is a five wire design. Three of the five wires are used for the feedback circuit.

The other wires are for ignition voltage and hvac control head requests. These smart actuators move according to voltage received from the head control set commands. A certain voltage will move the actuator one way a different voltage will move it in the opposite direction and a different voltage value will be commanded for the motor to stop rotating.

Bi-directional actuators use three wires for circuit feedback. The other two wires are the positive and negative circuits that drive the motor. These circuits are controlled by the HVAC control head set and move the motor direction based on the selection made at the control head.

The three-wire actuators have a power, ground, and an input wire from the hvac control head. These actuators use a pre-programmed logic chip containing all the information to drive the motor in the requested direction.

When a position change is requested by the vehicle operator, a circuit in the control head sends voltage to the actuator motor. As the motor moves, a potentiometer in the actuator compares the motor voltage to the output voltage from the control head. When both voltage readings are the same, the actuator motor stops.

There is no feedback to the control head with this design. Two wire actuators create electrical pulses when the commutator rotates across the brushes of the motor.

The HVAC control head, which has pre-programmed logic and actuator end point references, counts the electrical pulses as the motor moves the door through its sweep from one end to the other end.

The price to replace a damaged air conditioning actuator motor will be different depending on the make, model and year of the car and also if the new actuator will be an OEM actuator or an aftermarket actuator. The location of the actuator, depending on the hvac box design is the main factor taken into consideration when calculating the price of the service.Your car likely has a heater core where warm air is produced. When you want warm air, then air in the vents is directed to the heater core.

When you want cool air, the air is directed away from the heater core. Some cars will cost much less, such as the GMC Terrain. No matter what car you have this replacement procedure done in, the cost is about the same, but the parts can vary in price wildly. Usually, it is the actuator motor that has failed when the actuator is no longer working. By getting this problem taken care of, you can enjoy nice, cool air once more.

It will become unreliable, and you can get it back into proper working condition by having this simple replacement procedure done. Your technician will first diagnose the heating and cooling system.

Once he determines that the actuator is the source of the trouble, he will open up the heating and cooling system and take out the old actuator motor and replace it with a new one. In many cases, the blend door actuator can be reached through the hood of the car, but in some cars, the dashboard will need to be opened up, which can cost you more and take the mechanic longer to deal with. Once the new unit is in place, the technician will close everything up and then test the heating and cooling system again.

In some cases, the technician may want to do a road test to see how the system performs while driving. How often the blend door actuator fails depends on the kind of car you have. For some cars, this is common problem, but others will hardly ever have a failing actuator. This is not an emergency job, by any means, but you can damage your air conditioning system by running it with a failed actuator.

During summer months, you definitely want to get this problem fixed or you will be stuck with a hot car. If you are looking to cut some of your costs for the blend door actuator, then you can do so by doing the work yourself. This is a great way to save on labor costs, but you should only do that if it is a simple removal. If you would have to take out the steering wheel, dashboard, airbags or anything else from the inside of the car to reach the actuator, then you should probably leave it up to a professional.

There are simply too many things that could go wrong. You can try to compare rates from mechanics in your area, but you will probably find that their rates are pretty similar for this job. Be sure you tell them what type of car you have so they can give you an accurate estimate based on how difficult it is to remove the actuator. Compare your quote to other individuals from around the country to make sure you are getting the best deal. Remember me. Need to book this service? Find a Local Mechanic.

Table of Contents. Blend Door Actuator Costs Submitted By Our Users Compare your quote to other individuals from around the country to make sure you are getting the best deal. Subscribe to our mailing list. Chevrolet Silverado.This started happening about 2 weeks ago. When I start up my car or whenever I turn the AC on I hear 3 or 4 loud clicks coming from what seems to be under the dashboard.

The noise resembles a click with a thump followed by a trickling, shutter or flapping noise like a flap or valve is bouncing around after each click. The noise completely stops after about the 3rd click unless I restart the car or turn the AC on and off.

I'm sort of confused. Any ideas or suggestions would be very much appreciated, thanks! There are at least 4 of these actuators in your system and one of them is going bad and would need to be replaced.

Only then can a complete diagnosis be done.

car ac actuator

I recommend having a mechanic. Q: Brief, loud clicking noise from dashboard area when AC is turned on. My car has miles. My car has an automatic transmission. Jay Safford Automotive Mechanic. Thank Jay. Was this answer helpful? Thank you for your feedback! Sorry about that.

Why wasn't this information helpful? Recommended Services. The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details. Related Questions. Vehicle shudders when starting and stopping. Runs fine at cruising speed by Jeff. I'm getting a po code the car is losing power.

2005 Cadillac STS CTS DeVille all cars blender motor actuator problem fix

What are the odds it's the cheaper rear cat? What is the torque required for a inner tie rod? What causes a jerk when accelerating forward?The majority of cars and trucks have two actuators; one on the passenger side and one on the driver side. How Actuators Work.

From Wikipedia, the free encyclopedia An actuator is a component of a machine that is responsible for moving and controlling a mechanism or system, for example by opening a valve. Most late-model cars use electric motors called actuators to change the air temperature and direction of the airflow by opening and closing flaps in the heater box under the dash.

The left most knob controls the speed of the blower motor. Quarter turn actuators.

Automotive Hvac air door actuators.

Step 1 - Pick your Location. An actuator is simply a device which allows something to be actuated started or engaged or turned on or put into motion. Remove the three screws that secure the actuator plate to the heater box the actuator will come out WITH the black plastic plate. Keep your vehicle comfortable during the peak of summer and the dead of winter.

GAC employs its field proven electromechnical design which provides proportional actuator movement based on actuator coil current. Actuators Belimo damper actuators are designed for use in a wide variety of HVAC applications ensuring performance, reliability and lower power consumption. Anaheim Automation carries a line of high-performance AC servo motors with power ratings up to 5, Watts! A 2, PPR incremental encoder comes with every servo motor, saving wiring. Market leading, high performing pneumatic, hydraulic and electric actuators and actuation technologies for valve automation challenges.

Define actuator. Pressure from an external compressor or manual pump moves the piston inside the cylinder. An actuator requires a control signal and a source of energy.

Fits years: It has a built-in capacitor in the AC motor that enables you to quickly operate the actuator when the input is V or V power. See full list on carfromjapan. It's hard to get to, but there's a way to do it without removing the dash board, and this video will show you how to do it.

The AC actuator is located underneath the dashboard attached to air distribution doors in the hvac box. Probably a bad blend door actuator. The DC motor provides the load output from a screw drive with gears. All products and selections you see on the website are in-stock and available to ship out same day.A linear actuator uses one of a variety of mechanisms to produce motion in a straight line. The range of motion is called the stroke and can be measured in foot pounds of torque and inches of travel.

A high speed linear actuator would also be rated by the amount of time required to complete its linear travel, such as inches per second. Linear actuators may be mechanical, hydraulic, pneumatic, or electro-mechanical.

The power source for these devices may be low or high voltage electric circuits, compressed air, or hydraulic fluid under pressure. Parts for linear systems may include brackets, bearings, shafts and glides, controls, wiring, and relays and other switches. Applications include openers and closers for doors, door locks, positioners for chairs and beds, linear motion material handlers for machining operations and other manufacturing tasks.

A heavy duty linear actuator may be used for applications such as multi-level car park equipment or a conveyor system lift. Skip to main content. Linear Actuators. Customers also bought.

car ac actuator

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There's a problem loading this menu right now. Learn more about Amazon Prime. Get free delivery with Amazon Prime. Back to top.Therefore it is vital to have the right tools and understanding of this systems operation to effectively troubleshoot them. There are three methods used in the automotive industry to operate the HVAC doors or flaps for distributing cars in cabin air. These methods are:Cable controlled, vacuum motor controlled, electric motor controlled or any combination of these methods.

In the cable type system, the driver controls the system manually. The cables move the flaps as the levers on the head control set are moved. Early vacuum control systems used a vacuum control switch on the dash that, when operated by the driver, would direct engine vacuum to the corresponding actuator. Later vacuum control systems use electric switches, which send signals to a control module or controller, which in turn sends vacuum to the appropriate actuator.

The electric actuator motor consists of stators, slip rings, coils and a rotor, which contains permanent magnets.

Q: Brief, loud clicking noise from dashboard area when AC is turned on.

The actuator motor servo motor can be stopped at specific points in its armature with an accuracy of approximately 0. Electric Actuator motors used in modern hvac systems can be one of four designs, the electrical functions and circuits are different in each vehicle,Depending on vehicle manufacturer, system design, year and model: TRI-STATE hvac actuators A tri state actuator is a five wire design.

Three of the five wires are used for the feedback circuit. The other wires are for ignition voltage and hvac control head requests.

Air Conditioner Not Working

These smart actuators move according to voltage received from the head control set commands. A certain voltage will move the actuator one way a different voltage will move it in the opposite direction and a different voltage value will be commanded for the motor to stop rotating.

The other two wires are the positive and negative circuits that drive the motor.

car ac actuator

These circuits are controlled by the HVAC control head set and move the motor direction based on the selection made at the control head. These actuators use a pre-programmed logic chip containing all the information to drive the motor in the requested direction. When a position change is requested by the vehicle operator, a circuit in the control head sends voltage to the actuator motor. As the motor moves, a potentiometer in the actuator compares the motor voltage to the output voltage from the control head.

When both voltage readings are the same, the actuator motor stops. There is no feedback to the control head with this design. The HVAC control head, which has pre-programmed logic and actuator end point references, counts the electrical pulses as the motor moves the door through its sweep from one end to the other end. The ECM or PCM depending on the vehicle make, model and year will monitor the position of the hvac plenum doors through the actuators built-in potentiometer.

The control module will attempt to overcome any restriction on the system several times before it shuts down the circuit. If the binding clears on the next activation, the control module will perform a calibration and set a history DTC. Some vehicles require as long as thirty seconds of binding before setting a DTC. Some actuator motors are calibrated automatically in the self-diagnostic mode, whereas other actuator motors must be calibrated manually.

These actuators should only require calibration after motor replacement or misadjustment. When a new actuator motor is fitted, it is essential that the end position and step angle are adjusted. Calibration should be carried out with the engine running to obtain the correct running voltage.

The replacement of an automotive air conditioning actuator could take from 30 minutes in some cases up to one or two days job in some cars in which the removal of the entire dashboard is required to get access to it.


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