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HVAC Air Door Actuator Replacement
What is a HVAC Air Door Actuator?
Modern air conditioning systems, from the late 80's until now, have become more and more advanced in their ability to deliver comfort in a variety of ways to the passengers in vehicles. Not only can passengers control how much heat or cooling they receive, but they can receive both at the same time in different sections of the vehicle's interior. This calls for significant technology enhancements, one of which is the heating ventilation and air conditioning (HVAC) air door actuator. These actuators respond when the controls for the HVAC system are moved, and cause the air of a desired temperature to come out of a desired vent.
How do HVAC Air Door Actuators work?
When the controls on the air conditioner electronic (or vacuum controlled) controller are changed by the passenger, it controls the air door actuators. The HVAC air door actuators will respond to this input by following their programming, and changing the position of the air doors inside the HVAC ducts to accommodate the request of the passenger. For instance, if the air door controls how much air moves across the heater core, the HVAC air door actuator would move the door when the temperature setting is raised or lowered.
What are the symptoms of a bad HVAC Air Door Actuator?
Air door actuators fail in a couple of different ways. Passengers most often notice that the temperature on one or both sides of the vehicle are incorrect. Setting the temperature, even to the far opposite range may not lead to a change in the temperature of the air coming from the vents. Also, repeated clicking of clunks from underneath the instrument panel may be another indicator of a failed actuator. Another form of failure is to notice that the air is blowing out of the incorrect vent, cannot be changed to one or more vents, or even changes only with deceleration, acceleration, bumps, or hills.
Can I drive with a bad HVAC Air Door Actuator?
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Vehicles with one or more of the HVAC blend door actuator failures can be driven indefinitely, but the comfort and, depending on the climate, safety of passengers should be considered. In extremely hot climates such as deserts, not having an air conditioner in the vehicle could be considered a risk factor for children and seniors.
How often do HVAC Air Door Actuators need replacement?
Some models of vehicles, especially select domestic vehicles, suffer constantly from these failures. The HVAC air door actuators on some models may fail as early as 20,000 or 30,000 miles, while the majority tend to last for years. In fact, the majority of vehicles will never require a replacement air door actuator, but, like other electronic components, this is mostly random aside from those models which frequently experience failures.
How are HVAC Air Door Actuator issues diagnosed?
HVAC air door actuators are actually, no pun intended, simple to diagnose. A diagnostic scan tool will be connected, and the HVAC control module will be accessed. The air door will be commanded to open and close, and the physical action of the actuator will show whether or not the air door actuator is operating properly. This, however, is not a complete diagnosis. The technician must also take readings at the connector for the actuator to ensure that the proper signal is being sent. After all, the control module or wiring could have failed as well.
How are HVAC Air Door Actuators replaced?
Replacement is often the most difficult part of this repair, as diagnostics is often finished in a matter of minutes. In some cases, the actuator can be removed and replaced from the floorboard of the vehicle, by removing the glove compartment tray, or even by removing a small panel on the front or top of the instrument panel (dashboard). In many other cases, much like the heater core or evaporator coil, the actuators and blend doors require the instrument panel to be removed, and the HVAC central housing and ducts separated to complete this repair. This is a very in depth repair that involves very many steps, many hours, and much dismantling of the vehicle in those cases.
RepairPal Recommendations for HVAC Air Door Actuator issues
In some cases, repairing this deficiency is more costly than the value of the vehicle. If that is the case, it may be of interest to replace the vehicle instead of repairing the vehicle. On the other hand, there are many alternatives to repairing the HVAC air door actuators for many models of vehicles, but these will typically reduce functionality and require seasonal manual changes. We recommend discussing options with your technician before deciding whether or not to repair the vehicle.
What to look out for when dealing with HVAC Air Door Actuator issues
The symptoms listed can be replicated by a broken blend door, blockage in the air ducts, or bad sealing foam pads where the blend door seats against. Also, reprogramming or updating software of the HVAC control module may correct issues listed as well. For these reasons, it is important that diagnostics be carried out before the issue is assumed known.
Can I replace the HVAC Air Door Actuator myself?
In minor cases where an HVAC air door has failed and is accessible for replacement, this repair is very simple. Most people with a small tool set can replace the blend door in this situation. However, if the instrument panel must be removed, much deconstruction of the vehicle will take place, and the air conditioner may require discharging and recharging before the HVAC system will function properly. In this case, the repair should certainly be left to a professional technician.
Nissan HVAC Air Door Actuator Replacement Cost Estimates
The average cost for a HVAC Air Door Actuator Replacement is between $393 and $445 but can vary from car to car.