Motor Mishaps: Common Causes and Quick Fixes for Miter Saw Motor Is Running Backwards!

It’s unlikely for a miter saw motor to run in reverse motion out of the blue. However, there have been multiple cases of this particular incident after miter saw fixes. So, if your miter saw motor is running backward, the first thing to do is to identify what caused the issue.

The most common mistake people make is installing the blade backward. Other reasons include a mismatched motor component or wiring issues.

It shouldn’t be hard to fix this problem if you can find out what caused it in the first place. Let’s take a deeper look at the issue.

Miter Saw Motor Is Running Backwards

Why Miter Saw Motor Is Running Backwards? [Common Causes and Quick Fixes]

If you wish to solve the problem by yourself, identifying the source is mandatory. Finding the source will reduce the work by half. So, let’s take a look at the probable causes of the problem.

Blade Direction

The most common thing to happen in this case is when you install the blade wrong. A blade is supposed to be installed in a specific direction. The teeth or spikes must be facing down when you attach the blade.

If you install the blade the other way, it may look or feel like the motor is running in reverse motion. Check the user manual of your miter saw to see the specific method of changing the blade for this particular miter saw model.

If you are certain that the blade is correctly installed, only then go for other solutions. You can also check my article on are miter saw blades universal if you’re interested.

Mismatched Components

If you’ve recently replaced any part of your miter saw, it can be the answer to your question. When you don’t attach compatible components, the motor can run backward. In many cases, replacing the motor itself caused this issue.

Even though you’ve correctly installed the motor and all the wirings are in the right places, if the component is not exactly like the previous one, it can cause several issues, including the motor running in reverse motion.

This is also a common thing to happen among miter saw users. The reason is that parts of different miter saw models look pretty similar to each other, especially if they’re from the same brand.

So, take a deeper look at the part you replaced and check if the part has a model number written on it. Match it with your miter saw and check compatibility between the two.

Wiring Issue

Connecting the wires in the motor in a messed up manner would also cause this issue. If you want to prevent this from happening, you have to keep a picture of the previous condition before removing the wires. Replacing the motor requires the wire to be in place perfectly.

If you still have your user manual or an illustration of the wiring system for your miter saw, try matching it with the current wiring you have.

Contact Customer Support

If your miter saw motor is running backward without any particular reason, it’s a good idea to reach customer support of the brand. The issue will be better solved when the model is specified, and the people who manufactured the unit are taking care of it.

It’s the best solution if your miter saw is still under warranty and you haven’t voided the warranty by opening up the miter saw. You may even get a replacement for the damaged unit.

Nonetheless, even if your miter saw is not under warranty, the brand will still help you with instructions on what to do about the issue, depending on what brand you bought the miter saw from. So, make sure to try that.

Get It To A Professional

If nothing works, there’s no way but to take the miter saw to a garage. It will certainly cost you some money, but if your miter saw is salvageable, there’s no reason why you should give it up.

Replace The Miter Saw

Miter saws aren’t as long-lasting as other power tools, especially if you have a DIY unit. Sometimes the components wear out, and that can cause the motor to run backward. Even though it’s highly unlikely, it does happen from time to time.

If you have used the miter saw for a long time, and most of the components are damaged, it might be a good idea to invest in a new one.

Some Tips To Remember

Tips and Tricks Saw School
  • Most of the time, such issues are caused when you replace a miter saw component by yourself without enough information. So, unless you’re absolutely certain about what you are doing, it’s better to seek professional help, even if it costs a few extra bucks.
  • Before making any alterations to your miter saw, make sure it’s not connected to the power source. Unless you’re cutting materials with the miter saw, it should be unplugged all the time.
  • Never ignore the safety features of your miter saw. If any part of the miter saw is lacking in any manner, get it immediately fixed before using it again.
  • Maintaining your miter saw regularly can lengthen its life. So, make sure you’re giving your miter saw enough attention. Keep it clean, and avoid using it with a blunt blade.
  • Using a lubricant from time to time may help with rust and stuck components.
  • If you’re wondering if you are miter saw is too old to use, it probably is. With new models releasing frequently, it’s best not to get stuck with a particularly old model.
  • Make sure to take care of the dust when you’re using your miter saw. Moreover, keep a clean workplace to avoid unwanted incidents.

Frequently Asked Questions

FAQ Saw School

Which way should the blade of my miter saw be facing?

When you install a new blade on your miter saw, make sure that the teeth are facing downward. Installing the blade in the opposite direction will not only result in inefficient cutting but also cause kickbacks and compromise your safety.

Final Remarks

It’s not a usual scene when you see your miter saw motor running backward. The good news is there are a few solutions that you can try before taking it to a professional. Nonetheless, altering the miter saw without having detailed information seems to be the primary reason to cause this issue.

So, once you’ve tried all the safe options, it may be best to take it to a garage instead of worsening the situation. If you are in luck, you may also get help from the brand’s customer support. However, don’t get your hopes high if the miter saw is too old to be fixed.


Hey there — I’m Elton Dunn, founder and Head Writer of sawschool. Though I personally think myself as a self-made entrepreneur, I am DIY woodworker. This blog is a humble attempt to help people choose the right saw from too many options. That’s why I stress on comparing various saw with one another than attempting to review each. Hope my reviews and comparisons benefit you. Have any feedback, questions, or recommendations? We would like to hear from you! Feel free you can anytime Contact with me.

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