Why Does My Range Hood Keep Turning Off By Itself?

Cooking is a therapeutic activity for many, but when your range hood turns off by itself in the middle of cooking, it can be frustrating and alarming. 

A range hood is an essential appliance in any kitchen as it helps to remove smoke, steam, and cooking odors from your home. 

So, when it suddenly shuts down without any apparent reason, it can leave you puzzled and wondering what went wrong. 

In this article, we will explore the possible reasons why your range hood turns off by itself and what you can do to fix the issue. 

Whether you are a home cook or a professional chef, understanding the root cause of this problem can save you time, money, and a lot of headaches. 

So, let’s dive into the possible reasons behind your range hood turning off by itself and how to troubleshoot it.

A heat sensor activates a cooktop ventilation hood’s blower when heat from the cooking product is detected. There is no reason to worry about this.

Once the heat is cooled enough, the blower turns off. You can find further information about product use and care in the product’s user guide.

A service call is necessary if the heat sensor fails to work as expected or does not turn on or off.

What Are The Causes Of The Range Hood Turning Off Itself?

What Are The Causes Of The Range Hood Turning Off Itself

If your range hood isn’t running correctly, you can identify the cause and get it working again.

Before I tell you anything, let me give you some background information. It would be best to keep your range hood clean since debris can clog your range hood buttons, making it impossible to turn it on.

Vent Hood Blower Motor

Overheating and shutting off the blower motor can occur if the windings or bearings are damaged. It is essential to ensure that the blower wheel turns freely.

Occasionally, a motor will stop running after running for a while, or it might not turn freely. A lousy motor should be replaced.

It Can Be A Cause Of Your Remote Control

It Can Be A Cause Of Your Remote Control

Having a range hood that turns off on its own doesn’t necessarily mean the unit has a problem. A lost connection between your remote control and the range hood might be the reason for the problem.

How To Fix This

You can quickly resolve this issue by replacing the remote control battery if it needs replacing or reinstalling it. Additionally, make sure that all wiring is connected correctly.

You should also keep your remote control within the range of the range hood for optimal performance. Hopefully, you will find that your range hood will stay on longer after following these steps!

Vent Hood Fan Motor

Vent Hood Fan Motor

You may have a problem with the windings or bearings of the fan motor if it has power, but it keeps shutting off.

You can turn the fan blade by hand if it doesn’t work. If the fan blades are not turning freely or the motor keeps shutting off when power is being applied, the fan motor needs to be replaced.

Electronic Control Board Failure

A malfunctioning electronic control board might be to blame. This board controls aspects of the range hood, including the ventilation fan speed and light functions.

If the electronic control circuit board fails, the range hood will shut off if the board cannot function correctly.

A malfunctioning fan switch will also prevent it from working. A power supply problem or a connection issue in connecting your range hood system to other parts usually leads to this problem.

How To Fix This

If you do not contact a professional who can inspect and repair your appliance, this problem may occur in your home. To restore the functioning of your range hood, the electronic control board needs to be repaired or replaced.

Vent Hood Exhaust Fan Motor

Vent Hood Exhaust Fan Motor

There may be a problem with the windings or bearings in the exhaust fan motor if it has power to it but shuts off frequently.

If you have trouble turning the fan blade, try turning it by hand. When you have power to the exhaust fan motor, it must be replaced if the blades are not spinning freely, or the motor shuts off after a while.

Maybe It Is For An Overheating Issue

The range hood can be set to automatically turn off when it gets too hot. This feature means you don’t have to worry about your kitchen exhaust fan turning off manually after working on food for a long time.

Heat sensors are used in today’s range hoods that automatically shut off when a specific temperature is reached.

Aside from preventing overheating, this can also help prevent kitchen fires caused by excessive heat. Occasionally, you can hear hot air coming from the range hood, which is why it is heated.

Vent Hood Blower Wheel and Housing

Vent Hood Blower Wheel and Housing

In the blower, the motor is overheating and may shut off. You might need to replace the blower if the motor doesn’t spin freely or if it runs for a while before shutting off.

Cause Of Faulty Sensors

There are also instances when faulty sensors can be responsible for the sudden shutdown of a range hood. If the smoke sensor malfunctions, the control board will falsely signal that smoke is present. The appliance will then be turned off as a result.

How To Fix This

If this is the case, the problem should be solved by replacing or resetting the sensors. Ensure that you replace the sensor switch on the range hood if equipped with one.

Vent Hood Wall Vent Cap for 6 Inch Duct

Vent Hood Wall Vent Cap for 6 Inch Duct

When the vent hood motor turns off, the venting may be obstructed. The outside vent cap should be checked for a bird’s nest, etc.

Ensure that the vent hood is working correctly. Check the airflow at the inlet and the outlet. Someone should inspect the vent for you if you can’t access it and suspect that it is clogged.

Causes Of Motor And Socket

Range hoods turning off randomly most often have an issue with the motor or socket that powers them.

Range hoods are operated by motors which turn fan blades and pull air into the hood. When the motor is damaged, the appliance cannot be powered. It will therefore turn off by itself. Usually, overloading is the cause of this.

How To Fix

As a temporary fix until an appropriate repair can be made, unplugging and replugging the unit often works. The electronic control board may need to be checked for malfunctions in more complex electronic models.

Range Vent Hood Filter

A range hood’s filters must be cleaned to have good airflow. When the filters are clogged, there is difficulty moving air, causing the motor to overheat and shut down. You may need to clean or replace the filters if they are dirty.

How Long Can You Run A Kitchen Exhaust Fan?

You must consider the type of fan you have when determining whether it will work for you. Kitchen exhaust fans can typically be operated safely for 20-30 minutes at a time before needing to be turned off.

It is best to unplug the range hood so your kitchen can get some air circulation after this time.

Are There Any Screws Loose Behind The Range Hood To Turn It Off By Itself?

The first thing you should check for behind the range hood is that all of its components are properly connected and up-to-date.

The next step is to check for any loose screws at the base of your range hood or near the motor housing if everything appears in order.

If you tighten these screws, you can prevent interruptions in electricity, and your appliance will function normally again.

You might be better off calling a professional service technician if tightening the screws doesn’t work after following the article. Who can advise you and determine if something else is causing the range hood problem?

Final Words

It is an annoying problem when your range hood stops working by itself, and it affects your kitchen’s function. Fortunately, the problem can be readily identified and easily resolved with the right diagnosis.

Seek professional help for a thorough examination if you cannot identify the problem yourself.

Your range hood will work like a charm if you follow simple instructions. For recommendations on maintenance and upkeep, please consult your appliance’s manual.

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