Threadmill buttons don't work except for start, and only goes 1.0 in speed

If your Kettler Marathon ST treadmill is stuck at the blinking HR (heart rate) screen and is unresponsive to button presses, here are a few suggestions you can try to troubleshoot the issue:

1. Check the safety key: Ensure that the safety key is properly inserted into the console. The treadmill may not respond if the safety key is not properly engaged.
2. Reset the treadmill: Locate the power switch or unplug the treadmill from the power source. Leave it unplugged for a few minutes to allow the internal electronics to reset. Then, plug it back in or turn the power switch back on. This can sometimes resolve temporary glitches or errors.
3. Inspect the console connections: Open the console cover and check the connections between the console and the rest of the treadmill. Make sure all cables and connectors are securely plugged in. Loose or disconnected cables can cause communication issues and affect the functionality of the console.
4. Clean the console buttons: Over time, dirt, dust, or debris can accumulate around the console buttons, preventing them from registering presses. Gently clean the buttons and the surrounding area using a soft, lint-free cloth. Avoid using liquid cleaners that could damage the console.
5. Perform a console reset: Look for a small reset button or hole on the console. Using a paperclip or a similar object, press and hold the reset button for a few seconds. This will perform a console reset, which may resolve certain software or configuration issues.
6. Consult the user manual: Refer to the user manual or documentation that came with your Kettler Marathon ST treadmill. Look for specific troubleshooting steps or contact information for technical support.

with NT treadmills if any of the console goes then the whole console needs replacement unfortunately.

There would be some problem in wiring harness between motor control board and control panel. Try to remove form both side an reconnect it
If you wish to get some details; check the site linked here. Pull up older posts.
http://electro-medical.blogspot.com/

You have to replace the entire console.

1) adjust the speed sensor, clean it, and tight wires connector very well.
2)test the input voltage motor, if there are voltage, the motor need repair or replace.
3) measure the output voltage board, for input voltage motor, if there are NOT the board is faulty.
see the diagrams.
God bless you

Dear Sir:
This is probably a 1(faulty speed sensor or the 2( speed sensor is not plugged in properly. Its also possibly a 3(faulty motor control board or lower board+ 4( Main motor faulty. Adjust the speed sensor see the diagram.

Run the software calibration for easy diagnose and troubleshooting.

See my personal TIPS for HELP

sincerley. God bless you.

ernesto cuadra
managua, nicaragua.

i just had a noise in my York T301 that sounds exactly the same as yours. It also came up with a E1 error code and stopped working. I pulled the motor hood off and noticed that the magnet in the drive pully had come dislodged. It was hitting the speed sensor near the belt. Glued magnet back in and all better. Hope this helps.

You will need to check the speed sensor for proper alignment and function. it should be located near the front roller or mounted on the motor. It should be within a credit cards width of the magnet or toothed wheel. If properly adjusted check with an ammeter to see if it is opening and closing by manually spinning the front roller or motor flywheel. If it isn't replace the sensor. If it is functioning make sure you are getting 5vdc to it across the wires. If you are not replace the upper control board(console). If you are getting the proper voltage then replace the lower control board(motor controller).

it seems a speed sensor feedback problem
if competent remove power supply to threadmill ,open covers and locate speed sensor on motor drive unit ,blow dry air using a suitable air compressor or just use a brush to gentle remove any deposits
close covers and retry