The front roller’s rotations per minute are measured by the treadmill’s speed sensor, which then converts the reading to miles per hour on the computer. The speed sensor is connected to a circuit board that communicates with the treadmill control panel on the majority of models. The display panel may display an error code when issues with the sensor arise. This typically indicates a bad or loose sensor. A voltage meter can be used to test the internal circuits for continuity to find issues with the speed sensor. The speed sensor can be fixed after that.

How to fix a speed sensor treadmill? Do it yourself instead of calling the repair department! If you still don’t know how to solve this issue, read our article to learn everything you need to know!

Why is Your Treadmill Speeding Up on Its Own?

Do you want to know what’s causing your running machine’s inconsistent speed? To find out where your trainer is having trouble, try the next few steps.

To determine the treadmill’s recommended speed, you must first read the manual. Set this figure for the device next, turn it on, and keep a close eye on it from the side. You’ll require a suitable replacement for any belts that become damaged or jam.

Improper grounding is another reason for your trainer’s auto-acceleration. The user guide specifies that users must use a 20 amp outlet and plug it directly into the operating machine.

The trainer’s tachometer will suffer if you use an extension cord, surge arrester, or stabilizer. When insufficient voltage is supplied, the device will also experience issues with its velocity.

Additionally, the PCB connector and treadmill motor need to be checked because they could be loose. We advise you to routinely check the belt’s lubricant level and promptly top it off. Regular inspections are also necessary for the running machine’s engine and belt.

How to Fix a Treadmill Speed Sensor

Step 1

Shut off the treadmill’s power supply. The bolts holding the motor cover to the front of the treadmill can be removed using an Allen wrench. For access to these bolts, it might be necessary to remove the hub covers on either side of the treadmill, depending on the model. Remove and set aside the motor cover.

Step 2

Find the circuit board below and follow the white and black wire leads there. Remove the terminal posts on the circuit board’s black and white connectors. Find the bolts holding the mounting bracket for the treadmill motor in place. To loosen and remove the bolts, use a socket and ratchet or Allen wrench.

Step 3

To slack the drive belt, lift the motor end away from the front roller pulley. Lift the belt away from the motor pulley. To reach the speed sensor located at the motor’s bottom, position the motor upright. As the sensor is attached to the motor by a bracket, make sure it is stable. Use a screwdriver to tighten the screws and secure the bracket if the sensor is not stable.

Step 4

Track the sensor’s wire lead until it reaches the circuit board below. Connector should be removed from the circuit board. Utilizing a voltage meter, check the speed sensor wiring circuit for continuity. Replace the speed sensor if the meter displays continuity.

Step 5

Attach the speed sensor to the bracket at the motor’s bottom, and then tighten the screws. Connect the wire lead to the circuit board. Reconnect the motor to the mounting bracket, install the drive belt on the motor pulley, and tighten the bolts holding it in place.

Step 6

The motor’s black and white leads should be connected to the circuit board. Place the hub covers on the treadmill frame’s sides. Mount the motor cover. An electrical outlet should be used to plug in the treadmill’s power cord. To reset the treadmill, adhere to the directions in the owner’s manual.

How to Fix the Inaccurate Speed Sensor on the Treadmill?

The speed in miles (or kilometers) per hour is calculated from the belt’s revolutions per minute by the tachometer. In some cases, a tachometer will malfunction if it has a few minor internal issues, like a loose screw. An error code will appear on the screen in these circumstances.

So what should you do if you need to quickly check it’s insides? Instead of contacting a technician, you can also do it yourself by following these very simple steps:

• Make sure to unplug the device from the outlet to turn off the electricity to it.
• The white and black wires will lead you to the bottom circuit board after you remove the motor cover.
• From the circuit board, remove the leads.
• The motor’s mounting bolts should be loosened. In order to free up some slack and remove the bolts, you should then slightly raise the belt on the front pulley pendulum. Once everything is set up, you can access the tachometer and bottom bracket by standing the motor up.
• Take a look at their attachment. Use an Allen wrench to tighten the screws once they have become loose.
• Analyze the circuit board below using a voltage meter to determine its continuity. You must replace the treadmill tachometer if the meter remains illuminated continuously.
• After replacing, reverse the above procedure to reassemble the machine. For installation and restart instructions, consult the user manual.

What Are the Problems With Speed on a Treadmill?

A machine in motion may experience erratic changes in velocity due to certain components. Scroll down to find out what they are if you’re curious about them.

Belt and Deck Problem

To find out if there is a problem with the belt and deck, you should follow the following test procedure:

• Disconnect the power on the walking belt holder,
• Push the belt in the direction that it would normally rotate
• Belt/deck friction is high when it is challenging to turn the belt. If you let it continue for a long time, the DC board may become damaged.

To see if your belt has automatic velocity changes, try a little test below:

• Watch the treadmill operate without the belt at a speed of 2.5 mph. Check to see if the velocity changes at the same time.
• Try stepping on the belt if the results indicate no change in speed. If you notice a change in velocity, the output on the DC board isn’t working properly.

A Short in the Motor

To find out if your device has circuit board issues, a straightforward multimeter will be ideal. Between the DC motor lead and the circuit board’s common earth ground, there must always be an open circuit.

Another instance is when there is a problem with the machine’s tachometer signal. The feedback from the feedback links will cause your machine’s running speed to fluctuate erratically if the signal generator fails.

Signal Generator

If your trainer has any issues, the transmitter will also alter its running speed even if no one is using it. The device’s display may occasionally give you a message with a speed error code.

Final Thoughts

If you have the knowledge, maintaining and repairing tachometer issues won’t be a constant obsession. We hope you will no longer have to worry about how to fix speed sensor treadmill anymore through this article. What are you waiting for right now? Start bypassing your device right away by rolling up your sleeves!

Tags: Treadmill, Treadmill Speed Sensor