An actuator, or blend door actuator, is a small electric motor in your vehicle that runs in forward and reverse motion to move the Blend Door/ Air Mix Door between fresh air and re-circulation modes, hot and cold airflow, and floor/defrost modes.
The blend door actuator is a small HVAC motor that regulates the climate control system by controlling the air temperature. It directs the air from various sources, such as the defrosting vents, dashboard vents, or floor vents, when the temperature dial is adjusted. Well, in this reading, we’ll be exploring the six possible symptoms of a bad blend door actuator.
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Symptoms of Bad Blend Door Actuator
The symptoms or signs of a bad actuator are knocking, clicking, strange noises, inconsistent air flow, inconsistent temperature, and wrong temperature. You can check out the actuator when you experience any of this signs.
1. Knocking
When you hear a knocking sound, there is a high probability that you have a failing blend door actuator. You notice this when you start your car or the AC system, the knocking sound will start, and that’s when you know that you need to get your blend door actuator replaced.
2. Clicking
Clicking is another sign that you might have issues with your blend door actuator. The clicking sound will come from your car dashboard. It could be loud or faint, but it will be constant and repetitive. The sound will be coming from the area where your HVAC controls are on your dashboard. If you notice a clicking sound, book an appointment with a professional right away.
3. Strange Noises
You may begin to hear several noises as the blend door actuator starts to fail. For the first time, you can hear knocking sounds while turning on the temperature control system. A clicking sound may also be heard from the dashboard area. These sounds could be soft or loud, frequent or never-ending.
4. Wrong Temperature
The wrong temperature may continually exit the vents after the blend door actuator entirely fails. This might appear as heat escaping when the air conditioner is on, and vice versa. There’s no problem in waiting and giving the system some time to adjust if you’ve just switched controls. The temperature should continue to follow the variables after that minute, or you may need to have a new blend door actuator fitted.
5. Unreliable Airflow
The blend door actuator should always maintain a constant and smooth airflow. If the airflow is inconsistent or disrupted, it may indicate a problem with the actuator or other issues such as a broken fan, clogged cabin air filter, or blocked intake.
6. Inconsistent Temperature
You expect the right temperature to come out of the vents when you put on the air conditioning or heat in your car. If you receive anything else, there is a problem. Temperature swings that occur on their own are even more troubling. It’s a clear sign that the blend door actuator may be faulty if you encounter alternate periods of heat and cold.
That is all for this post, where i have discussed the common symptoms of a bad blend door actuator. I hope it was helpful, if so, kindly share with others. Thanks for reading, see you around!
