SI2 Error Code While Using Your Treadmill

What the SI2 Code Means

The treadmill was powered up while it was still folded, or a false signal is being sent to the controller — either from the fold-up sensor or from the console.

Troubleshooting Steps

1. Power cycle the treadmill

   The overvolt protection circuit of the controller is active, so it will not output voltage to the motor. Turn off the treadmill, unplug it, wait 10 minutes, then restart it and see if it operates normally.

2. Calibrate the treadmill

   Work through the calibration help topic from our repair help section.

3. Check the motor for overheating

   Run the treadmill for a few minutes, then check the motor for signs of overheating such as a smoky smell, charred power leads, or charred connectors.

4. Inspect the controller for charring

   Check the controller for any signs of charring. Belt and deck friction often causes the treadmill to pull too many amps, which can ruin a motor, a controller, or both.

5. Check the motor brushes

   The brushes are connected to the ends of the red and black motor wires. They should sit solidly in their holders and have an even surface that curves to match the commutator in the motor.

6. Test the motor

   Use the motor testing help topic from our troubleshooting section to confirm the motor is good.

7. Replace the console

   If the motor tests good but you still get the SI2 code at random, replace the console.