If any of these happens, you won’t be able to control your vehicle climate. If you have a damaged blend door actuator, it’s either the plastic gears have worn out or the actuator has failed. In that case, you should inspect or contact your mechanic for proper inspection and blend door actuator replacement. Suppose your airflow doesn’t heat up to the operating temperature or AC blowing hot air instead of warm air. Wrong Temperature : Bad blend door actuators are mostly the cause of malfunctioning climate control systems. And that’s a good indication you have a bad blend door actuator. Inconsistent temperature : An Oscillatory moment of your blend door will cause the airflow to be diverted incorrectly. Each time you notice a Knocking or tapping sound when you start your vehicle or turn on the HVAC system, it signifies an issue with the blend door actuator. Knocking sound under the dash : This is quite uncommon, but whenever you notice a Knocking sound under the glove box, the blend door actuator is likely the culprit. If the actuator plastic gears deteriorate, the teeth will break off and cause slipping when you turn the HVAC knobs. You will hear this sound due to a bad door blender in some cases. Most times, switching the climate control dial can temporarily stop the noise. This noise may be obvious when you switch on your vehicle AC system or turn on the climate control dial. A faint clicking or droning sound underneath the dash is usually a blend door actuator noise. In that case, that indicates you have a bad blend door actuator. Suppose you hear a droning or faint clicking repetitively from the dashboard, around the center area, where your HVAC system control knobs are located. If you’re searching for any vehicle or Tacoma blend door actuator symptoms, you will find the answers in the next few paragraphs.Ĭlicking sound beneath the dashboard : If you’re having problems with your climate control, turn on the AC and climate control system and pay close attention to the dashboard. Whenever any system component of your vehicle fails, symptoms will pop up to tell the driver of an issue that needs attention, and the blend door actuator is no exception. If you need cool air, the actuator will turn to the close position to prevent heat from entering the vehicle. You might need warm air when the vehicle is cold or vice versa when you turn the climate control dial, the blend door will have to send in the desired air. The blend door is a plastic box located on an under-trim panel, responsible for sending cool or warm air within the vehicle to keep the passengers comfortable. The dual blend door actuator is mostly found on newer cars with the feature to set front or rear passenger climate separately. Some cars have a dual blend door actuator that enables the driver to control the climate in different time zones. 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. When you adjust the actuator airflow intensity or turn the temperature dial-up and down, the input signal passes through the actuator. What is the blend door actuator?Ī blend door actuator is an electric HVAC motor that works together in harmony with sensors connected to your climate control system. Knowing defective blend door actuator symptoms will help you do a quick blend door actuator repair and save you from expensive repair costs. Whenever you have a problem controlling the air circulating inside your vehicle, or if it’s stuck at blowing full blast, or making a tapping noise as if someone is tapping on your door, chances are you have a problem with the blend door actuator. To access the fuses, press the release tabs and remove the cover.Blend door actuator is an HVAC system component that controls the temperature and airflow inside a vehicle. The Front Distribution Unit is located on the right side of the engine compartment, next to the battery. Cavityįront and Rear Ceiling Lights Trunk and Door Courtesy Lightsĭiagnostic Socket, Car Radio, Climate Control SystemĬar Radio Switch, Climate Control System, Stop Light, ClutchĮxterior Mirror, GPS, Electric Mirror, Parking Sensor The interior fuse panel is part of the Body Control Module (BCM) and is located on the driver’s side under the instrument panel. The following diagram is for Fiat 500 2015. The fuse box diagram in Fiat 500 may vary from the year of production.
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