Masterbuilt Fan Not Working (5 Easy Fixes)

Photo of author
Matt Richard

Dealing with a Masterbuilt smoker fan not working can be frustrating when you’re in the middle of a BBQ session.

But don’t worry. In this article, you’ll discover helpful insights on troubleshooting and resolving Masterbuilt smoker fan malfunctions.

Key Takeaway

Some common reasons for the fan not working in a Masterbuilt smoker include incorrect temperature settings, physical damage, or component failures.

Potential Reasons Why Your Masterbuilt Smoker Fan Isn’t Working

There are numerous reasons why your smoker fan might not be functioning properly, but the following are the most common.

Reason 1: Faulty Interior Components

Check for stuck charcoal pieces, open hopper lids, and ash doors that might affect the fan’s performance.

You should also ensure that the temperature sensor isn’t damaged or defective, which can cause erratic fan behavior.

Inspecting your Masterbuilt smoker’s elements can identify potential issues before they worsen.

Reason 2: Unresolved Error Codes

Pay close attention to any error codes displayed on your Masterbuilt smoker’s controller. Error codes can indicate specific issues with your fan or other components.

For example, an “open” code may suggest a problem with your smoker’s hopper lid or ash door.

Fortunately, you can resolve many standard error codes by following the guidelines provided in your Masterbuilt manual.

Reason 3: Temperature Sensor or Probe Issues

Understanding how temperature affects your Masterbuilt smoker’s fan functionality is crucial.


The fan turns off once it reaches the set temperature, which is normal behavior. The fan will start up again when the temperature dips below the desired level.

If the fan keeps turning off, incorrect temperature readings or overheating issues may be the culprit. Note that overheating is serious and may cause the smoker to power off for safety purposes.

If this is the case, resetting your controller or verifying the accuracy of your temperature sensor can resolve the problem.

Troubleshooting Steps to Fix Your Masterbuilt Fan

Below are actionable steps you can take to get the fan working again.

Step 1: Reset the Controller and Ensure the Firmware is Updated

The first step is to reset the controller. Unplug your smoker for 5 minutes and then plug it back in to see if the issue resolves.

Next, check the Masterbuilt app to see if your smoker has the latest firmware update, which could fix potential software-related problems.

Step 2: Check the Control Panel and Wiring

Inspect the control panel for any visible damage or loose connections. Similarly, examine the wiring connecting the fan to the controller.

If you find any loose or frayed wires, they may need to be reconnected or replaced to ensure proper fan operation.

Step 3: Examine the Temperature Sensor and Probe

The temperature sensor and probe are vital in controlling the fan’s functionality. If either becomes damaged or dirty, it may cause inaccurate readings and affect the fan’s operation.

For example, if you’ve had your smoker for a while, you may notice a build-up of soot which can prevent accurate readings. You can clean the temperature probe by rubbing away the soot with a cloth.

You can also use soapy water if the soot or grime is challenging to remove. However, ensure the probe is completely dry before inserting it back into place.

If you can’t clean the probe (or you notice damage), consider replacing it.

Step 4: Inspect the Fan, Switches, and Connectors

An obvious issue causing your Masterbuilt smoker fan not to work correctly could be the fan’s motor.

Look for any physical damages or obstructions. In some cases, charcoal pieces or ash may get stuck and cause the fan to malfunction.

Likewise, faulty switches and connectors could also contribute to the Masterbuilt fan not working. Carefully examine all buttons and connectors for damage or wear.

If you find issues with any components, consider replacing them.

Step 5: Perform a Deep Clean of the Interior

The adage “an ounce of prevention is worth a pound of cure” accurately describes maintaining your smoker. Regular cleaning and maintenance can help prevent many issues, including fan malfunctions.

For example, keep the ash and smoker doors clean, as debris or grease fires can obstruct the fan’s operation.

Also, clear any wood chips or charcoal pieces that might get stuck and affect the fan’s function.

If you’ve got to this point and your Masterbuilt smoker fan isn’t working, consider cleaning all the interior components.


Don’t attempt to detach any non-removable parts while cleaning. Instead, use a brush to remove debris or build-up around those parts.

Frequently Asked Questions

If you still have questions about your Masterbuilt smoker’s fan not working, check out the answers below.

Why Won’t the Fan Turn On?

Check the power source and controller. Faulty parts or a blown fuse could also be causing the issue.

How Do I Fix Error Code 3?

Error code 3 on a Masterbuilt smoker means a temperature sensor issue. Check for visible damage. If none, reset the smoker by unplugging it, waiting, and plugging it back in.

Are There Common Issues With the 800?

Although the Masterbuilt 800 series smokers are usually solid performers, they can sometimes encounter problems with the display screen, temperature control, and Bluetooth connectivity.

What Are Typical 560 Problems?

Masterbuilt 560 smokers occasionally encounter fan, temperature sensor, or controller issues.

How Do I Reset the Smoker?

To reset your Masterbuilt smoker, turn it off, unplug it, wait 5 minutes, then power it back on. This process resolves most issues.

Final Thoughts

It’s frustrating when your smoker’s fan isn’t working. Fortunately, this guide provides tips likely to fix the issue. A few important troubleshooting steps are:

  • Cleaning the temperature probe
  • Inspecting wiring connections
  • Testing the motor functionality

If you’ve completed all the steps in this troubleshooting guide and the fan still isn’t working, you’ll likely need to purchase a replacement part.

Photo of author
Hey, I'm Matt Hollingshead, a BBQ enthusiast, beer connoisseur, and the founder of Grill Mentor. When I'm not trying new recipes with my Traeger or sampling a craft beer, I'm publishing articles for this site.

You May Also Like...

masterbuilt meat probe calibration

Masterbuilt Meat Probe Calibration (Explained)

Ensuring that you have an accurate thermometer to check meat’s internal temperature is crucial to prevent serving ...

Masterbuilt App Not Connecting to WiFi or Bluetooth

Masterbuilt App Not Connecting to WiFi or Bluetooth

Are you trying to use the Masterbuilt Grills & Smokers app but can’t get it to connect ...

masterbuilt smoker keeps shutting off

Masterbuilt Smoker Keeps Shutting Off? (4 Fixes)

Does your Masterbuilt smoker keep turning off while you’re trying to cook food? While annoying, it doesn’t ...