{"id":1507,"date":"2021-08-26T15:52:36","date_gmt":"2021-08-26T15:52:36","guid":{"rendered":"https:\/\/www.motoraudit.com\/?p=1507"},"modified":"2023-10-09T14:43:47","modified_gmt":"2023-10-09T14:43:47","slug":"car-blower-motor-works-intermittently","status":"publish","type":"post","link":"https:\/\/www.motoraudit.com\/car-blower-motor-works-intermittently\/","title":{"rendered":"Why Car Blower Motor Works Intermittently? (Causes & Fix)"},"content":{"rendered":"\n

The blower motor is one of the HVAC system’s main components that push hot air throughout your car when running the heating system. <\/p>\n\n\n\n

The AC evaporator allows providing cool air when you start the air conditioning system. <\/p>\n\n\n\n

But, sometimes you’ll face that your car blower motor won’t work properly that means car blower motor works intermittently. For this, It’ll hamper your driving experience, and you won’t get proper airflow through the car vents. <\/p>\n\n\n\n

So, Here in this article, I’ll explain to you some possible causes of this problem and how you can fix those issues.<\/p>\n\n\n\n

What is the purpose of a Car Blower Motor?<\/h2>\n\n\n
\n
\"How
Source: O’Reilly Auto Parts<\/a><\/figcaption><\/figure><\/div>\n\n\n

The blower motor is the main electric motor in the car HVAC system. The purpose of this blower motor is to allowing blowing air to come through the vents by transferring the electrical current. <\/p>\n\n\n\n

It uses a motor resistor and switch to control the speeds of airflow. For this, You can operate and regulate cabin temperature according to your preference.<\/p>\n\n\n\n

In addition, It\u2019s not only important for operating an air conditioner system on your car. Without proper functioning of the blower motor, your car might face an overheating problem that affects your car engine.<\/p>\n\n\n\n

\n

Read Also:<\/strong> Who Makes Icon Tools and Where Are They Made? (Explained)<\/a><\/p>\n<\/blockquote>\n\n\n\n

How will I know Car Blower Motor is working Intermittently?<\/h2>\n\n\n\n

You can easily identify the symptoms by observing a few things. Here are few signs that indicate your car blower motor Works Intermittently.<\/p>\n\n\n\n

Blower Stops Working or Takes Time To Start: <\/h3>\n\n\n\n

Whenever you click the switch, you’ll witness that it suddenly stops working or takes time to start the motor. <\/p>\n\n\n\n

In addition, The blower motor might turn on and off randomly while you’re driving the car.<\/p>\n\n\n\n

Noise Comes Behind The Vent:<\/h3>\n\n\n
\n
\"Noise<\/figure><\/div>\n\n\n

Another thing you’ll notice is that it makes a sound as it operates on a low voltage, and you’ll get noise from behind the vent, such as a sudden pop. <\/p>\n\n\n\n

Also, The noises sometimes change according to the fan speed. If you turn on the fan at full speed, you’ll hear louder sounds and whirring noises that indicate the problem with the blower motor.<\/p>\n\n\n\n

Often Start Working:<\/h3>\n\n\n\n

Another intermittent operation clue is that the motor will often start working after a bang on the heater box.<\/p>\n\n\n\n

\n

Read Also:<\/strong> How to Reset Crankshaft Position Sensor? (No Start Problem)<\/a><\/p>\n<\/blockquote>\n\n\n\n

Why Car Blower Motor Works Intermittently?<\/h2>\n\n\n\n

Several reasons can lead to car blower motor works intermittently. Here are few causes of this problem:<\/p>\n\n\n\n

Ignition Switch Issue: <\/h3>\n\n\n\n

The problem might be with the ignition switch. To find out whether the problem is on the ignition switch or not, try wiggling or moving the key around the ignition; if you find a sign that it affects the blower motor, then it’s okay. <\/p>\n\n\n\n

Otherwise, The ignition wire or contacts could be wrong, which leads to the problem.<\/p>\n\n\n\n

Blower Motor Fan Issue: <\/h3>\n\n\n\n

The fan motor itself can cause this problem. After starting the engine, if it never quits after running a while, then the problem is on the fan motor. <\/p>\n\n\n\n

The intermittent operation is happened due to worn brushes inside the motor. <\/p>\n\n\n\n

Also, If you need to bang on the heater box to start it, then it’s a potential clue of a bad motor. It happens because of burned connector terminals and overheating.<\/p>\n\n\n\n

Bad Relay:<\/h3>\n\n\n\n

The faulty fan motor relay can be the cause of intermittent operation. <\/p>\n\n\n\n

Wire Issue: <\/h3>\n\n\n\n

The melted or faulty connector wire might create the issue.<\/p>\n\n\n\n

Bad Motor and Resistor: <\/h3>\n\n\n\n

Sometimes the bad blower motor and the resistor are the cause of this problem.<\/p>\n\n\n\n

\n

Read Also:<\/strong> 4 Symptoms To Detect A Bad IWE Solenoid: (Must Know)<\/a><\/p>\n<\/blockquote>\n\n\n\n

How To Know whether a blower motor resistor is bad or blower motor?<\/h2>\n\n\n\n

To ascertain whether a blower motor resistor is malfunctioning or if the blower motor itself is the issue, conduct the following diagnostic steps.<\/p>\n\n\n\n

Blower Motor Resistor Issue:<\/h3>\n\n\n
\n
\"Blower
Source: Auto Repair Guys<\/a><\/figcaption><\/figure><\/div>\n\n\n

This is a common problem in many cars. The most common symptom of a blower motor resistor is that when you start the heater fan, it only runs at the highest speed setting (4 or 5) and doesn\u2019t work at lower speeds.<\/p>\n\n\n\n

It indicates that your car blower motor resistor has an issue. Also, Sometimes the heater stops completely due to a bad blower motor resistor.<\/p>\n\n\n\n

Blower Motor Issue:<\/h3>\n\n\n
\n
\"Car
Source: EasyAutoFix<\/a><\/figcaption><\/figure><\/div>\n\n\n

You\u2019ll witness several symptoms which indicate that your car blower motor won\u2019t work properly. Here are a few symptoms of the bad blower motor.<\/p>\n\n\n\n