The main issues that occur with the car’s air conditioning system are due to poor maintenance. Car AC Not Blowing Air from Vents – What You Need to Know. If this actuator is faulty, your car might blow hot air out from the vents even if you require cold air. Inspect both external and internal air intakes located at the base of the windshield (external) and at the passenger side foot well (internal). plugged by a piece of paper, cloth or other form of blockage it will slow or stop the fan motor has shorted and is not operating at full output. (adsbygoogle = window.adsbygoogle || []).push({}); Either the blower isn't working, in which case you may get warm air but not much of it, or it is blowing air but it may not be very hot. It can be among the general issues if AC isn’t cooling enough. Stuck & Blend Air Door. system, one fresh air the other is re-circulated air. Most older cars have wires for this, but newer cars have an electronic signal between these, which can fail. There could not only be damages to the AC compressor clutch; the compressor itself can also fail if you are unlucky. Hi, I’m Magnus, the owner and the writer of Mechanic Base. If this filter becomes clogged due to lack maintenance it will stop Why is my AC not blowing air? The Air condition control unit is often quite expensive, and it is recommended to check the other things first. Most newer cars have a variable AC compressor, though, and in this case, no AC compressor clutch can fail. Car AC Not Blowing Cold Air: A Bad Fuse The first thing to check with any issue related to the car's climate control or electronics is the fuse box. There are any number of reasons cold air or no air is coming through the vents. Faulty heater cores and low or contaminated coolant levels often come hand in hand, and both issues may lead to your engine overheating and your heater not blowing hot air. If this fan motor is starting Few things are more annoying than realizing your AC is out and no air is blowing from the vents. Any answers or suggestions are appreciated! Only let a certified workshop with the proper equipment do work to your AC system. If your car is only blowing cold air, even when the engine is warm, there are a few potential causes. Step 4 - There are two air intakes for the ventilation Step 4 - There are two air intakes for the ventilation by Magnus SellénUpdated: February 19, 2021. If these air intakes become If this fails, it may send the wrong signal to the blend door actuator, and this may cause it to blow hot air instead of cold. The filter catches all the dust and impurities that enter the passenger compartment and can, therefore, become clogged over time. But when it’s on 1/2/ or 3 I hear the motor working, but there is no air blowing. system, one fresh air the other is re-circulated air. Here is a more detailed list of the most common causes of a car AC not blowing cold air. If you notice that your AC is working at higher speeds but not lower, there could definitely be a problem with the condenser fan. RELATED: How Much Does an AC Recharge Cost? The most common problem, a car heater blowing cold air and overheating / a car heater blowing cold air is the low coolant level. The AC compressor pumps refrigerant around in the AC system for it to cool properly. 9 Causes of Car AC is Not Blowing Cold Air, Faulty Heat Controller / Air Condition Control Unit, 9 Causes Why Your Car AC is Not Blowing Cold Air, 6 Causes of Why Your Car Heater is Blowing Cold Air, 7 Causes Why Car Temperature Gauge Stays on Cold, Why You Should Replace Your Cabin Air Filter In Time, Alternator Not Charging - 6 Causes & Diagnostics. The AC condenser is often installed in front of the radiator, and this makes it sitting in a very exposed position for stones and other parts that can damage it at high speeds. SPONSORED LINKS If you haven’t refilled it in 6-7 years, it is definitely time for a refill, and if it was more recently you filled it, it is time to check for any leaks. Removing Air Cabin Filter Easy step by step guide one how to troubleshoot and repair vent low air flow, If the pressure gets too high – it will stop the AC compressor from cooling the system anymore because of safety reasons. remove Now, imagine that your car’s air conditioning system suddenly stops blowing cold air; how would you feel? flow should stop and start again, if the thumb wheel does not make a difference Cabin Filter Damage. The This setup can look a little bit different, but the main function is the same. Inspect both external and internal air intakes located at the base the air vent. Step 3: Check the strength of airflow. 2. This often causes the AC condenser to start leaking refrigerant, which will cause the AC refrigerant to pour out. This makes the AC compressor to spin and power the AC system. Inspect both external and internal air intakes located at the base If you notice that your thermostat gauge stays on the “C” even after the … The cooling fan in the condenser is the first thing that you should look … Step 3 - A fan blower motor is controlled by either If this fan fails, there might be a problem with the AC system at lower speeds. If these air intakes become plugged by a piece of paper, cloth or other form of blockage it will slow or stop the airflow. Also, a clogged cabin air filter leads to a deterioration in the air conditioning system’s cooling. Work the thumb wheel from one side to the other while checking the airflow. If cold air is coming out of the heating vents, even when the vehicle is warmed up and the thermostat is set to hot, you could be dealing with one of the following problems: Low coolant A blockage in the heater core A stuck blend door A stuck heater valve A bad switch or linkage amp meter should read between 8 and 15 amps. Step 4 - There are two air intakes for the ventilation Blower Motor A defective condenser fan. Your AC system is filled with an ac refrigerant, making sure the whole system is working correctly. I hope you enjoy my content! of the car, near the base of the windshield on the passenger side, We wish we had a miracle answer as to the problem with your Car’s A/C but there is … Air lock: An air lock is a large air bubble that forms in your cooling system as the result of a coolant … Blower motors can die or be damaged, which will slow or stop the power of your ventilation system. If the AC compressor fails, you often have to flush the whole AC system afterward because there might be metal pieces everywhere. Why should I replace my Cabin Air filter. a switch in the passenger compartment or by a computer. plugged by a piece of paper, cloth or other form of blockage it will slow or stop Blend air door is the reason for drawing hot air to cold air in your car system. You can … the airflow. With the fan motor on in the full speed setting the This is the reason that it takes a while for heaters to start blowing warm air. A car heater that isn't working could be caused by several simple issues. As you might understand, it won’t pass any wind through it at lower speeds. The main issues that occur with the car’s air conditioning system are due to poor maintenance. Although an automotive AC system has few moving parts, diagnosing why your car is blowing warm air can be tricky. The last cause on this list is a faulty heat controller. For this, we need a fan that can run instead of the wind at lower speeds. Diagnosing Airflow Problems Check all of the vents. The most common causes when car AC is not blowing cold air are an empty AC system, faulty air compressor, faulty AC pressure switch, and a clogged cabin filter. Anything lower than 8 amps could mean of the windshield (external) and at the passenger side foot well (internal). There are two AC pressure switches in your car that monitor the high-pressure side and the low-pressure side of the air condition system for safety reasons. power wire of the fan motor.
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