Yoder YS640 Temperature Problems (With Fixes)

The Yoder YS640 is a pellet smoker/grill that is known for its superior performance and versatile cooking capabilities. However, many users have experienced temperature problems when using this grill. 

Common issues include temperatures being higher or lower than the set temperature, fluctuating temperatures, and difficulty maintaining a consistent temperature.

Luckily, there are several steps you can take to help troubleshoot and resolve these common temperature issues.

Yoder YS640 Temperature Problems

1. Temperature Fluctuations Issue

Temperature fluctuations on the Yoder YS640 often occur as a result of improper setup, not allowing enough time for the grill to properly preheat and/or letting it cool down too quickly between uses. 

Proper setup is essential to ensure consistent and accurate temperature readings from the thermometer.

When setting up the YS640 correctly, it is important to preheat the grill for at least 20 minutes; this will help ensure that all of its components are heated evenly. 

a thermometer is being used, it should be placed in the center of the cooking chamber and left for about 10 minutes before recording its temperature. It’s also important to keep the lid closed during and after preheating.

2. Thermostat Issue

When it comes to Yoder YS640 pellet grills, one of the most common problems encountered is the temperature control issue. 

This problem occurs when the thermostat in the grill fails to accurately measure and regulate the temperature within a pre-set range. 

As a result, temperatures may fluctuate and become too hot or not hot enough. This can lead to uneven cooking, ruined food, and ultimately reduce the lifespan of the grill.

The most common cause of a thermostat failure is a loose or damaged wiring connection. If left unchecked, this issue can lead to an electrical short in the unit that can create dangerous circumstances when operating the device.

It is important to inspect all wiring connections and replace any damaged ones. Also, Yoder YS640 owners should ensure that their thermostat is properly calibrated to the correct temperature range.

3. Thermocouple Problems

Thermocouples are an important part of the Yoder YS640 smoker, as they help detect heat levels and monitor the temperature. 

Unfortunately, thermocouple problems can lead to inaccurate readings, causing the smoker to become overheated or too cool for optimal cooking.

Common issues with the thermocouples can include failure to start, incorrect readings, or a lack of response to temperature changes. 

If any of these issues occur, it is important to check the thermocouple and make sure it is properly connected. More it, be sure that the thermocouple is not exposed to direct heat or condensation.

In some cases, replacing the thermocouple may be necessary. If the thermocouples become too hot, they can burn out or fail to properly detect temperature changes. It is important to replace any thermocouples that become damaged or faulty.

4. Smoker Issues

The Yoder YS640 is a popular smoker that is known for its ability to deliver consistent, high-quality results. Unfortunately, many users have reported having difficulty keeping the temperature of their smoker stable. 

This issue relates to the Electronic Temperature Control (ETC) feature of the smoker, which allows users to customize their desired temperature.

In many cases, the ETC will not hold the desired temperature and can fluctuate up to 50 degrees Fahrenheit. This is due to a combination of factors, including improper calibration, incorrect settings, or even faulty components.

 If you’re having difficulty with your YS640 smoker’s temperature, there are some steps that you can take to resolve the issue.

First, make sure to calibrate your thermometer correctly before using it. This will ensure that you’re getting an accurate reading of the smoker’s internal temperature. 

You can also adjust the settings on your ETC by increasing or decreasing the amount of power going to the heating element, which may help stabilize the temperature

5. Problem With Auger

The auger is an important component of the Yoder YS640 smoker, as it efficiently moves pellets from the hopper to the fire pot. A malfunctioning auger can lead to several problems, including temperature fluctuations and improper heating.

If your smoker experiences temperature fluctuations or fails to heat properly, it is possible that the auger isn’t functioning as it should. If this is the case, you may need to replace or repair your auger. 

Common signs of a malfunctioning auger include slow or jerky movement, excessive noise, or difficulty turning on or off.

When replacing an auger, be sure to check the condition and length of the auger to ensure it is adequate for your grill. It is also important to remember that the auger must be properly secured in order to prevent any smoke or heat loss.

6. Contact Customer service

If you are having temperature problems with your Yoder YS640, contact customer service to get help troubleshooting the issue. 

Customer service can provide technical advice and instructions on how to properly calibrate the temperature settings, as well as diagnose any underlying hardware issues that may be causing the problem. 

Also, customer service can also provide instructional videos or diagrams that may help you resolve any temperature problems with your YS640.


The Yoder YS640 is a great smoker and grill that can provide you with delicious food. However, maintaining accurate temperature control on this device can be difficult due to its design.

If you experience any problems with your temperatures while using this product, consider adjusting the dampers or adding more charcoal in order to achieve better results. 

More then, it’s always best to check all of your connections before use and make sure they are secure as improper connection may also cause issues with controlling temperatures accurately. 

With proper maintenance and care for your Yoder YS640 smoker/grill, you should have no problem achieving consistent cooking temperatures each time!


Why is my pellet grill not keeping the temperature?

There are a few possibilities that could be causing your pellet grill to not maintain its temperature. It is likely due to either an obstruction in the burn pot, incorrect settings, or an insufficient quantity of pellets. 

To check for obstruction, make sure the burn pot is free from debris and any clogs. If everything looks clear, verify that your smoke setting and temperature setting are what you desire them to be.

What is the temp range on a Yoder ys640?

The temperature of the Yoder ys is between 150°F to°F (66°C 316°C). This wide range makes it ideal for a variety of cooking tasks, from slow-roasting and smoking to baking and grilling.

With this temperature range, you’ll be able to achieve professional results with consistent perfection every time. You can even use the grill as an oven or smoker if desired. 

The Yoder ys640’s precision digital control allows you to cook at both high temperatures (for searing) or low temperatures (for slow roasts). 

Why is my Yoder smoker not heating up?

There are several possible reasons why your Yoder smoker isn’t heating up. It could be caused by a problem with the ignitor, which may need to be replaced;

 an issue with the airflow, which can block the heat from traveling around the chamber; or a thermocouple failure, which can prevent accurate temperature control.

Additionally, it’s important to make sure that all connections are secure and that there is no gas leakage present in order for the proper combustion of fuel. 

If you’re still having trouble getting your Yoder smoker up to temperature after checking these potential issues, it’s best to consult a certified technician for help.

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