Range Hood Won’t Turn Off

Range hood won’t turn off. If your Range hood does not turn off, there could be an internal problem that needs to be addressed soon. Here are three fixes you can try.

Having a constant background fan noise coming from your kitchen can be irritating. Understandably, such types of noises are usually reserved for helping people fall asleep or perhaps when doing office work (certain verbal noises are even worse here).

Intensely loud sounds from the kitchen, however, are strange and disruptive to any peace within a home.

Range Hood Won’t Turn Off

We will discuss the problems with the range hood and how we can fix them.

1. Broken On/Off Switch

Broken OnOff Switch

This is a very common problem, usually caused by a misaligned switch. It’s only natural for some components, such as the switch, to wear out after years of dedicated service; it’s just life!

If you’re cooking a delicious supper one day and your range refuses to turn off despite pressing the on/off button, wear and tear are most likely at fault.

However, depending on whether or not all other functions are functioning properly, additional possibilities can lead us back to a defective switch as the source of the problem.


  1. First, try to identify the cause of the leak.
  2. If you find that it’s coming from an area where a vent is installed, then there are two things you can try.
  3. Remove the outer vent cover and tighten the screws, or replace the vent altogether if it’s damaged beyond repair.

2. Bad Wirings

If your range hood does not turn off when you tell it to, it could be due to a wiring issue. This is especially likely if your range hood has been through several seasons.

Wear can cause some wires to come free over time, just as it does with the power switch. However, age isn’t the sole consideration.

On rare occasions, range hoods can have badly wired wires from the manufacturer, so don’t rule out this possibility if you’ve just bought a new appliance.


  • DIYers must understand when they need to bring in a professional. If you’re unsure if you can perform this repair yourself, you should consult an electrician or call a local specialist to help you with the range hood repair.

3. Circuit Board Error

Circuit Board Error

This happens because of a variety of reasons. Maybe the range hood needs to be taken care of, or there was some electrical surge.

The list of possibilities goes on and on. Or, you could have just performed a faulty installation, to begin with!

Either way, something went wrong, and your circuit board is no longer functioning.


  • Replace the circuit board. Trust us, even though you could try replacing it on your own, you’d only make things worse as advanced knowledge is required to figure out how every component works. Call your tech guru right away before anything else happens!


Why is my range hood always turning on?

When the interior temperature of a cooking range with a vented hood falls below a certain level, the oven automatically shuts off.

This is a standard cooker mechanism, but be sure you use it appropriately. Never use your stove without routinely monitoring its temperature and shutting down the unstable one if it is on fire!

Do range hoods have fuses?

If the vent hood isn’t connected to a wall outlet, double-check that all of your home’s circuit breakers and fuses are in good operating order.

Use a multimeter to check for continuity to see if the thermal fuse has blown. If there is no continuity, you will need to replace it; additionally, if there is a problem with the main control board, you will have no choice but to replace it.


Range hood won’t turn off. Your range hood may have overridden its timer switch as a safety safeguard if it has been on for a lengthy period. This is done to keep the fan running and prevent blocked grease traps.

It can usually be turned off manually in most circumstances. The easiest approach to avoid repeating this problem is to inspect your timer switch every few months and confirm its functionality by replacing it or calling for routine repair.

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