Stuck Key Error Message on Life Fitness F3

How do I fix error 6 on my treadmill?

E6 Error: Controller malfunction. Resolution: Ensure that the cables connecting the console and the controller are secure. If any of the cables/connectors appear loose, completely power off and unplug the treadmill before unplugging and reattaching the cables.Sep 23, 2021

E6 Error Code: Control Board Malfunction - Spirit Fitness Support

https://www.google.com/search?q=LIFE+FITNESS+T3+ERROR

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Hi Yuri,
Hope so you're doing well, the distance unit from miles to kilometers on the Life Fitness Club Series+ treadmill, there are a few steps you can try before contacting Life Fitness support:

1. Warm reset: Press the CLEAR key twice, and then hold down the ENTER key. The treadmill should perform a "warm" reset and beep three times, indicating that the USER MENU has been activated. After the reset, check if you can access the distance unit setting.
2. Manual access: Alternatively, you can try holding down the ENTER key while turning on the treadmill. The message "USER MENU" should appear, and after a second, the MESSAGE CENTER will display the first menu item. Navigate through the menu options using the appropriate keys until you find the distance unit setting.

Hope so this will work for you!
Regards,
Bryce June

Replacement Parts for Fitness Exercise Equipment at SPORTSMITH

This problem can usually be resolved by replacing the overlay keypad.

First, check and make sure the safety magnet is in the correct place. If not, place magnet. If it is, then the safety magnet sensor, sensor cable, or the console is messing up.

Error 1 - Start up error. This is caused because the belt was commanded to move and the opto (speed sensor on the motor) has not seen any movement or the belts movement was interrupted prior to it reaching its commanded speed. To fix Verify opto operation in Diagnostics, Motor Test
Mode, Section 2. Verify DC voltage at connector P6 pins 1 and 2. Verify that LED 4 on the Motor Controller flashes as the motor moves. Let me know if you need any more help. Fitness Fix-It

The safety magnet/switch is not in the correct place. Make sure it is in the correct location.

The FET error message is caused by the driver transistor on the motor controller has shorted out. Unfortunately, the fix is replacing the motor controller.

The cause of a “STUCK KEY” error message on the Basic or Advanced consoles. A stuck key error is displayed when one or more keys on the console or activity zone remain actuated for more than 45 seconds.
SOLUTION
Recycle the power. If the key remains stuck, the console will display “PLEASE WAIT” until the stuck key error is displayed again. Determine the stuck key. Replace the console if the problem is a key on the console. Replace the activity zone membrane keypad or the activity zone circuit board depending on the product if the problem is not in the console.

It was the emergency tag that you attached to yourself when you run (in case you fall over - the belt then stops etc). i had not connected it properly

It needs a new key pad it is shorted the ge website has a list of error codes f3 is the keypad