Identifying HVAC Blower Failure in a BMW From Experienced Mechanics in Oakland

Proper cabin air temperature is a critical feature for any driver, because any drive can go from pleasant to miserable if it’s too hot or too cold. This system is known as the HVAC, which stands for Heating, Ventilation, and Air Conditioning. One of the main components is the blower motor, which is responsible for blowing the heated or cooled air through the venting system of your car.

Even if the rest of your HVAC system is in perfect working order, a malfunctioning blower motor can prevent air from blowing and stop you from getting the temperature control you need. Because of this, a properly-functioning HVAC blower motor is crucial for a comfortable drive, especially when driving in extreme hot or cold environments.

Common Causes of Blower Motor Failure

Dirt accumulation

Dirt accumulation is the most common reason for vehicle blower failure. Whether or not you use the air conditioner or heater, dirt and other debris can enter the venting and accumulate inside your blower. This dirt can inhibit the motor’s speed and functionality and prevent it from developing a proper airflow.

Electrical problems

Blower motor failure can be a result of electrical malfunctions. You can check for some of the physical causes yourself with a general knowledge of HVAC systems. However, we suggest you go to a mechanic to determine the reason behind the malfunction if you cannot identify it yourself, or if it appears to be an electrical issue. Attempting to detect an electrical problem yourself without prior knowledge or experience can be hazardous for both you and your vehicle.

Old age

Just like any other component of your vehicle, the HVAC blower of your car will eventually degrade and malfunction after an extended period of time. Regular inspections can help determine when this will become an issue.

Failed bearings

The bearings of a blower motor can deteriorate over time, or could merely become overly tense or loose. These malfunctions can prevent the motor from turning correctly, resulting in a lack of airflow. You will likely be able to determine if this is the issue due to the loud noises that will occur as worn bearings lead to excessive drag.

High amp drawing

The maximum voltage of a blower should be around 20 amps. This is a symptom that is a result of prolonged usage of worn bearings. If you check this and determine your vehicle to be in an unsafe range, have it inspected by a mechanic.

Recognizable Signs of HVAC Blower Failure

There are a couple of signs that the blower motor of your vehicle is not functioning correctly. The most common is a weak airflow.

The airflow from your car’s vents will begin to weaken when the blower motor is malfunctioning. If you suspect your air conditioning or heating has recently lost efficiency, schedule an inspection with your trusted local mechanic to have it inspected.

Another common problem drivers experience is no airflow at all. Similar to a weakened airflow, a completely malfunctioning blower motor might prevent air from emitting from the vents altogether.

Both an abrupt stop and a slowly degraded airflow are signs the HVAC blower motor needs replaced. Unfortunately, the symptoms of a malfunctioning blower motor are the same for many components of the HVAC system. These similar symptoms mean it can be difficult for you to determine the exact cause of the HVAC system malfunction without an inspection from a professional.

Germany’s Best, Inc. Will Repair your HVAC Blower

Recurring HVAC blower motor issues are uncommon but Germany’s Best Inc. can help with first-time or repeated problems with your HVAC blower. Even better, we’ll solve it so you won’t have to come back again.

We are located in Oakland, CA and are proud to provide the Berkeley, Emeryville, Piedmont, and Oakland, CA regions with fast and efficient service for German-made vehicles.

We are comprised of German auto specialists who provide better and more affordable service and repair while using the latest factory-grade tools and equipment. We offer a wide variety of services and repairs, including A/C repair, and are proud to have been providing drivers the auto services they need for over 25 years. Call us today for a convenient appointment.