Masterbuilt Smoker Error Codes (1, 2, 3, 4, 5) Reason And Solution

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Masterbuilt smokers are popular for their convenience and ease of use in smoking delicious meats and foods.

However, encountering error codes like 1, 2, 3, 4, or 5 can be frustrating. These error codes signify different issues with the smoker and understanding their reasons and solutions is crucial to get the smoker up and running again.

From temperature sensor malfunction to electrical problems or control panel issues, these errors can be resolved through careful troubleshooting and maintenance.

I will explore the reasons behind these error codes and provide solutions to help you overcome them.

So let get started, Shall we?

Common Error Codes In Masterbuilt Smokers

Understanding the error codes displayed on your Masterbuilt smoker’s control panel can help you troubleshoot and resolve any issues quickly.

Let’s explore the most common error codes in Masterbuilt smokers and know the reasons behind each error code, along with their respective solutions.

Troubleshooting Error Code 1: Insufficient Oxygen Supply

When your Masterbuilt smoker displays Error Code 1, it indicates that there is an insufficiency of oxygen supply within the smoker.

This issue can prevent proper combustion, resulting in inadequate heat generation and smoke production.

The insufficient oxygen supply error typically occurs due to:

  • Blocked air vents or exhaust ports
  • Improper placement of wood chips or charcoal, obstructing airflow
  • Excessive ash buildup, inhibiting proper ventilation

To troubleshoot and resolve this issue, follow the steps below:

Check The Air Vents For Blockages

The first step in resolving Insufficient Oxygen Supply error code is to check the air vents of your Masterbuilt smoker for any blockages that may be hindering the proper airflow.

These vents are responsible for allowing oxygen to enter the smoker and facilitating the combustion process.

If the vents are blocked, it can result in inadequate oxygen supply, leading to this error code.

To check for blockages in the air vents:

  1. Inspect the external surface of your smoker and locate the air vents.
  2. Ensure that there are no obstructions such as debris, dust, or any other foreign material blocking the vents.
  3. If you find any blockages, carefully remove them using a brush, cloth, or any other suitable tool.

Ensure Proper Placement Of The Wood Chips/charcoal

Another factor that can contribute to the Insufficient Oxygen Supply error code is the improper placement of wood chips or charcoal in your smoker.

It is crucial to ensure that these materials are positioned correctly to allow for optimal oxygen flow and combustion.

Follow these steps to ensure proper placement of wood chips or charcoal:

  1. Refer to the manufacturer’s instructions to determine the recommended placement of wood chips or charcoal in your specific Masterbuilt smoker model.
  2. Be sure to distribute the wood chips or charcoal evenly in the designated container or tray, avoiding dense piles or uneven distribution.
  3. Check if the wood chip tray or charcoal holder is positioned properly and securely in the smoker. Ensure it is not obstructing the air vents.
  4. If necessary, adjust the placement of the wood chips or charcoal to ensure adequate oxygen flow.
Also Read: Masterbuilt 560 Fan Not Working or Won’t Turn On – How To Fix?

Troubleshooting Error Code 2: Ignition Failure

Another common error code is Code 2, which indicates an ignition failure. Ignition failure can prevent your smoker from heating up and cooking your food properly. In order to resolve this issue, there are a few troubleshooting steps you can take.

This error code can be triggered by several factors, such as:

  • Faulty ignition switch or electrode
  • Insufficient gas supply or empty fuel tank
  • Loose gas connections

To troubleshoot Error Code 2, follow these steps:

Clean The Ignition Source (electric Or Propane)

The first step in troubleshooting an ignition failure error code is to clean the ignition source. Depending on your Masterbuilt smoker model, the ignition source can be either electric or propane.

Here’s how you can clean each ignition source:

  • Electric Ignition

If your smoker has an electric ignition, check the heating element and ensure it is clean and free from any debris or grease buildup.

Use a brush or cloth to gently clean the element, removing any dirt or residue that may be hindering the ignition process.

Additionally, check the wiring connections to ensure they are secure.

  • Propane Ignition

If your smoker uses propane for ignition, make sure to check the propane tank and regulator. Ensure that the tank is not empty and has enough propane to ignite the burner.

Also, check the connection between the propane tank and the burner to ensure it is secure.

Sometimes, a loose connection can prevent the propane from flowing properly and igniting the burner.

Check The Fuel Supply And Connection

Aside from cleaning the ignition source, another potential cause of ignition failure is an issue with the fuel supply and connection.

Here’s what you should do:

  • Fuel Supply

Check if your propane tank has sufficient fuel. If it’s running low, replace or refill it as needed. Additionally, ensure that the tank valve is fully open to allow a steady flow of propane to the burner.

If you are using an electric smoker, ensure that the power supply is stable and there are no electrical issues or outages.

  • Connection

Check all connections between the propane tank or electric power source and the smoker. Check for any loose connections, damaged wires, or issues with the power cord.

Secure any loose connections and replace any damaged components that may be causing the ignition failure.

By following these troubleshooting steps, you can address the ignition failure error code and get your Masterbuilt smoker back to working condition.

Remember to always prioritize safety when working with propane-powered smokers and to consult the user manual for specific instructions related to your model.

Also Read: Masterbuilt Smoker Leaking From Bottom – How To Fix?

Troubleshooting Error Code 3: Temperature Fluctuations

Masterbuilt smokers may display Error Code 3 if there are temperature fluctuations during the smoking process. Several factors can contribute to this error, including:

  • Insufficient insulation
  • Temperature probe placement
  • Opening the smoker door frequently

To address Error Code 3 and achieve consistent temperature:

Verify The Smoker’s Temperature Settings

First and foremost, you need to ensure that the temperature settings on your Masterbuilt smoker are accurate. Incorrect temperature settings can lead to significant temperature fluctuations, triggering Error Code 3.

To verify the temperature settings, follow these steps:

  1. Turn off the smoker and unplug it from the power source.
  2. Inspect the temperature control panel, where you can set the desired cooking temperature.
  3. Double-check that the temperature settings align with the recipe or guidelines you are following.
  4. Make any necessary adjustments to the temperature settings to ensure they are accurate.
  5. Plug the smoker back in and turn it on, allowing it to reach the desired temperature.

By carefully verifying and adjusting the temperature settings, you can avoid temperature fluctuations and eliminate the occurrence of Error Code 3.

Insulate The Smoker For Better Heat Retention

Poor insulation can cause heat loss, resulting in temperature fluctuations within the smoker. To minimize these fluctuations and prevent Error Code 3, it is essential to insulate your Masterbuilt smoker effectively.

Here are a few tips to improve heat retention:

  • Check for any gaps or leaks in the smoker’s structure or door seal. Use high-temperature-resistant insulation tape or caulking to seal any openings.
  • Consider using a insulation blanket specially designed for your Masterbuilt smoker. These blankets provide an additional layer of insulation, helping to maintain a consistent temperature.
  • If you are using your smoker in cold or windy conditions, consider placing it in a sheltered area or constructing a windbreak to reduce heat loss from external factors.

By insulating your Masterbuilt smoker effectively, you can significantly reduce temperature fluctuations and ensure a more reliable smoking experience, free from Error Code 3.

Also Read: Masterbuilt 560 Control Panel/Display Not Working – Fix It Now

Troubleshooting Error Code 4: Sensor Malfunction

If you own a Masterbuilt smoker and encounter Error Code 4, you may be experiencing a sensor malfunction. 

This error can occur due to:

  • Wiring issues
  • Malfunctioning temperature or meat probe sensors
  • Loose connections

To resolve Error Code 4, follow these steps:

Check The Temperature Sensor For Dirt Or Damage

The first thing you should do when faced with Error Code 4 is to inspect the temperature sensor for any dirt or damage.

Over time, the sensor may accumulate dirt or debris, affecting its accuracy and causing the error code to occur. Carefully examine the sensor and gently clean it using a soft cloth or brush.

Ensure that there are no obstructions that could interfere with its proper functioning.

If you notice any signs of damage, such as a loose wire or broken casing, it may be necessary to replace the sensor altogether.

Calibrate Or Replace The Faulty Sensor

If cleaning the temperature sensor doesn’t resolve the issue, it may be necessary to calibrate or replace the faulty sensor.

Calibration ensures that the sensor is reading and transmitting accurate temperature data to the control panel.

To calibrate the temperature sensor, refer to the manufacturer’s instructions or user manual for specific steps. This process may involve adjusting the sensor’s settings or using specialized tools.

If calibration doesn’t solve the problem, it is likely that the sensor itself is faulty and needs to be replaced. Contact the manufacturer or authorized service center for assistance in obtaining a replacement sensor.

They will guide you through the process of acquiring and installing a new sensor for your Masterbuilt smoker.

By following these troubleshooting steps, you should be able to effectively address Error Code 4 related to a sensor malfunction in your Masterbuilt smoker.

Remember to always refer to the manufacturer’s instructions and reach out to their customer support if you require any additional assistance or specific guidance.

Troubleshooting Error Code 5: Power Interruption

Error Code 5 indicates a power interruption in your Masterbuilt smoker.

This error can occur due to:

  • Power outage
  • Loose power cord connections
  • Tripped circuit breaker

To troubleshoot Error Code 5, follow these steps:

Confirm The Power Source And Connection

When you encounter Error Code 5 on your Masterbuilt smoker, the first step is to confirm the power source and connection.

This error could occur due to a faulty power supply or an improperly connected cord. Check if the power cord is securely plugged into the outlet and ensure there are no damages to the cord itself.

Additionally, check if the power outlet is functioning by plugging in another device or using a voltage tester.

By confirming the power source and connection, you can identify if the issue lies with the smoker or the electrical setup.

Use A Surge Protector To Prevent Power Disruptions

A common cause of power interruptions is electrical surges. These surges can occur due to lightning strikes, power grid fluctuations, or even household appliances turning on and off.

To protect your Masterbuilt smoker from such interruptions, it is recommended to use a surge protector.

A surge protector helps regulate the voltage supplied to your smoker, preventing sudden spikes that could trigger Error Code 5.

Ensure that the surge protector you use is suitable for the power requirements of your smoker and is in proper working condition.

Using a surge protector not only safeguards your smoker from power disruptions but also protects other sensitive electronic components from potential damage.

Additionally, it provides you with peace of mind, allowing you to smoke your food without worrying about unexpected power interruptions ruining your cooking process.

By confirming the power source and connection and using a surge protector, you can troubleshoot and resolve Error Code 5 on your Masterbuilt smoker swiftly.

These simple steps ensure that your smoking experience remains uninterrupted, enabling you to savor your favorite smoked dishes with friends and family.


To troubleshoot your Masterbuilt smoker error codes (1, 2, 3, 4, 5), it’s important to identify the reasons behind them. By understanding the specific error codes, you can easily find the solutions and get your smoker up and running again.

Don’t let these errors discourage you – with the right troubleshooting steps, you’ll be enjoying perfectly smoked meats in no time. Happy smoking!

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