7 ways to check if the fans are working in a laptop (without disassembly and with disassembly)

Your laptop starts overheating and you suspect the fans are to blame? Or just want to make sure your cooling system is working correctly? Checking coolers is the first diagnosis if overheating is suspected, and it can be done even without special tools. In this article we will analyze 7 reliable methodsHow to check fans on a laptop - from visual inspection to using diagnostic utilities.

It is important to understand: if coolers do not work, this is fraught not only with a decrease in performance, but also failure of the motherboard, video card or processor due to critical overheating. For example, for laptops ASUS ROG And MSI with powerful chips from Intel Core i9 or AMD Ryzen 9 Fan failure can lead to emergency shutdown after just 5–10 minutes of intense load. Therefore, it is better to check regularly - especially if you notice that the case has become hotter than usual.

We will consider methods for all levels of training: from basic (suitable even for a beginner) to advanced (with disassembling the case and testing the connection). You will also find a table of typical fan errors and their causes, and at the end - answers to frequently asked diagnostic questions.

1. Visual and tactile inspection (without programs)

The easiest way is to listen and touch the laptop. You don't need to disassemble or install anything to do this.

How to check:

• 🔊 Listen to the noise. In normal mode, the fans produce a uniform hum (on new laptops it may be almost inaudible). If the coolers are not spinning, you will only hear the hard drive running (if there is one) or silence.
• 🖐️ Touch the body. Place your hand on the vents (usually on the side or bottom panel). If the air does not blow, this is an alarming sign. Heated air should exit the laptop when under load.
• 💨 Blow into the grill. If the coolers are working, you will feel resistance (like blowing into a fan). If there is no resistance, the blades may be jammed.

This method does not provide a 100% guarantee, but it helps to quickly identify obvious problems. For example, if a laptop Lenovo Legion or Acer Predator when playing Cyberpunk 2077 does not make fan noise - this is a clear sign of a malfunction.

⚠️ Attention: Don't confuse absence of noise with technology 0dB (for example, in laptops ASUS Zephyrus) when the fans turn off at low load. Test coolers under load - run a stress test or a heavy game.

2. Check via BIOS/UEFI

If the laptop turns on, but you are not sure whether the fans are working, you can go into the BIOS. Here the coolers should spin at minimum speed (if they are working properly).

Instructions:

1. Turn off your laptop.
2. Turn it on and immediately press the key to enter the BIOS (usually F2, Del, Esc or F12 - depends on the model). For HP this is often F10, for Dell — F12.
3. Listen: in the BIOS the fans should be running (albeit quietly). If there is silence, there is a power or connection problem.

In some BIOS versions (for example, on laptops MSI or Gigabyte) there is a section Hardware Monitor, where the cooler revolutions are displayed (Fan Speed). If there 0 RPM — fans do not rotate.

3. Using monitoring programs (HWMonitor, SpeedFan, AIDA64)

Special utilities show fan speed in real time. This is the most reliable way to check without disassembling.

Top 3 programs to check:

• 📊 HWMonitor (free, shows the speed of all coolers, temperature and voltage).
• 🔧 SpeedFan (allows you not only to monitor, but also to regulate fan speed).
• 💻 AIDA64 (paid, but there is a trial version; detailed information about all sensors).

How to use HWMonitor:

1. Download the program from the official website CPU-Z.
2. Run it (does not require installation).
3. Go to the tab Fans. If on the contrary Fan #1, Fan #2 etc. are zero - the fans are not working.
4. Run a load (for example, a stress test in Prime95 or game) and see if the speed changes.

If the program does not show revolutions, this may mean:

• 🚫 The fans are not physically connected to the motherboard.
• 🔌 Problems with chipset drivers (especially after reinstalling Windows).
• 🛠️ Faulty speed sensor (the cooler is spinning, but the program does not see it).

Make sure the laptop is not in power saving mode|Close background programs|Connect the laptop to the network (for accurate readings)|Check for driver updates-->

4. Stress test: forced start of fans

Sometimes coolers do not work only under load. To check this, you need to create an artificial load on the processor and video card.

Stress test programs:

• 🔥 Prime95 (CPU load).
• 🎮 FurMark (GPU load).
• 🖥️ OCCT (complex test).

How to test:

1. Install one of the programs (for example, Prime95).
2. Run the test for 5-10 minutes.
3. Listen to the laptop: if the fans do not work, and the temperature (look in HWMonitor) is growing - the coolers are faulty.

For example, in laptops Apple MacBook Pro (until 2020) fans should turn on when the CPU temperature is higher 60°C. If this does not happen, the problem is in the cooling control system.

⚠️ Attention: Do not run a stress test on a laptop with a low battery or at higher ambient temperatures 30°C. This may result in a crash.

5. Checking the connection of fans (with partial disassembly)

If programs do not see the coolers, and they do not visually spin, there may be a connection problem. To do this you will have to disassemble the laptop a little.

What you will need:

• ⚒️ Screwdriver (usually Phillips PH0 or PH1).
• 🧲 Antistatic bracelet (optional, but recommended).
• 📸 Camera (to photograph the location of the screws).

Step by step instructions:

1. Turn off the laptop and disconnect the battery (if it is removable).
2. Remove the bottom cover (on some models, e.g. HP Pavilion, you only need to remove the part of the cover above the coolers).
3. Locate the fans (usually they are bolted to the radiator).
4. Check if the cooler's power connector is connected to the motherboard. If not, connect it.
5. Try turning the blades by hand. If they do not rotate or rotate with difficulty, they need cleaning or replacement.

In laptops Lenovo ThinkPad And Dell Latitude A common problem is the oxidation of the fan connector contacts. If after connecting the cooler does not work, try cleaning the contacts with alcohol.

What to do if the fan connector is damaged?

If the connector on the motherboard is broken, you can try soldering a new one (but this requires skills in soldering SMD components). An alternative is to use an external USB cooler connected to the laptop port. However, this is a temporary solution, since the standard cooling system is still needed for normal operation.

6. Diagnostics via the command line (for advanced)

On some laptops (especially Windows 10/11) you can check the condition of the fans through WMIC is a command line tool.

How to run the scan:

1. Open Command Prompt as Administrator (Win + X → Command Prompt (Administrator)).
2. Enter the command:

   wmic /namespace:\\root\wmi PATH MSAcpi_ThermalZoneTemperature get CurrentTemperature

   This will show the temperature in Kelvin (divide by 10 to get degrees Celsius).

3. If the temperature is high (for example, 8000 = 80°C), and the fans do not make noise - they do not work.

You can also try the command to check the speed (does not work on all laptops):

wmic cpu get loadpercentage

If the CPU load 100%, and the coolers are silent - this confirms the malfunction.

7. Table: Typical fan malfunctions and their causes

If you find that the fans are not working, this table will help determine the possible cause:

Symptom	Possible reason	Solution
Fans do not spin at all (0 RPM)	There is no power, the connector is faulty, the cooler is burned out	Check connection, test another fan
Coolers spin, but very quietly	The grille is clogged with dust, the bearing is worn out	Clean your laptop, lubricate or replace the fan
Fans only run at maximum speed	The temperature sensor or PWM controller is faulty	Reflash BIOS, replace sensor
Coolers turn on with a delay (at high temperatures)	Problems with control drivers, dust on the blades	Update drivers, clean cooling system
The revolutions fluctuate (either high or low)	Unstable power supply, damaged cooler cable	Check the cable for damage, replace the power supply

For example, in laptops Acer Nitro 5 Often there is a problem with the speed “sticking” at maximum due to a failure in EC controller (built-in microcontroller). In such cases, resetting the BIOS or flashing it helps.

FAQ: Frequently asked questions about checking laptop fans

Is it possible to check the fans without disassembling the laptop?

Yes, most methods do not require disassembly: visual inspection, monitoring programs (e.g. HWMonitor), stress tests and checking through BIOS. You only need to disassemble the laptop if the programs do not see the coolers or you suspect a connection problem.

Why don't the fans spin even though the laptop is heating up?

There are several reasons:

• 🔌 The connector connecting the cooler to the motherboard is faulty.
• 🖥️ Malfunction EC controller (responsible for controlling fans).
• 🔄 Incorrect settings in BIOS (for example, disabled Smart Fan Control).
• 🛠️ Mechanical failure (jammed bearing, broken blades).

First check your BIOS settings and update your chipset drivers. If that doesn't help, disassemble the laptop and inspect the coolers.

How to check fans on MacBook?

On MacBook (2015 and newer) fans are controlled at the firmware level, and standard programs like HWMonitor don't work. Use instead:

• 🍎 Macs Fan Control (allows you to manually adjust the speed).
• 📊 iStat Menus (shows temperature and speed).

If coolers do not respond even at higher temperatures 90°C, reset SMC (System Management Controller). To do this:

1. Turn off your MacBook.
2. Clamp Shift + Control + Option (left side of the keyboard) + power button for 10 seconds.
3. Release the keys and turn on the laptop.

What to do if the fans are noisy but not cooling?

If the coolers are spinning, but the temperature of the processor/video card does not drop, the following problems are possible:

• 🧹 The radiator is dusty. Dust acts as a heat insulator - clean your laptop every 6-12 months.
• 🧊 The thermal paste has dried out. There should be fresh thermal paste between the processor and the heatsink (change it every 2-3 years).
• 🔥 The radiator is faulty. The radiator fins may have become deformed or moved away from the tubes.

In laptops MSI GS66 And ASUS TUF There is often a problem with “air pockets” in the thermal interface - when replacing thermal paste you need to apply it very carefully.

Is it possible to use a laptop if the fans are not working?

Short-term - yes, but with serious limitations:

• ⚡ Use only for light tasks (working with documents, web surfing).
• ❄️ Place your laptop on a cooling pad with external fans.
• ⏱️ Take breaks every 20-30 minutes to let your laptop cool down.

If the laptop turns off due to overheating - don't turn it onuntil you fix the problem with the coolers. For example, at Intel Core i7-12700H critical temperature - 100°C, after which the protection is triggered and the laptop turns off.