Erratic speed on Horizon treadmill.

Hi There, This sounds like the control board may be failing. Can you see the control board? Check the 3 larger capacitors for doming or bulging on the tops, which is a sign of high internal heating of the capacitors. This board, 032671 can have issues with these caps. Lubricate deck well, free spin the walking belt by hand to feel for jerky rollers and flat-spots in bearings, if all feels smooth, that controller is most likely at fault or a failing motor with partially shorted windings. Contact [email protected] for more help if needed.

If you wish to get some details about treadmill repair ; check the site linked here. Pull up older posts.
http://electro-medical.blogspot.com/

Hi there, I think I can help. Now depending on model year the Horizon T500 can use a couple different motor control boards, most all of which are fixed at jatinah electronics which you can find with a Google search. It sounds like a failed control board fixed for 99 or less and exchanges available with returned cores. Good luck

Use lubrication oil obtained from horizon fitness !
google search horizon fitness find nearest store to you

http://www.livestrong.com/article/209998-how-do-i-lube-a-horizon-treadmill/
once lubrication is complete, reset the console by pressing and holding 'STOP' and Speed '+' buttons for 5 seconds
https://www.greenfitco.com/Fitness_Manuals/Horizon/Horizon-Treadmill-T91.pdf !page 30 !

see the video and see what happen.
Need to call to his supplier treadmills for fix it.
LED Blink Patterns on the Control Board Treadmill
Blessing.
[email protected]
cell+whatsAPP:+50588611441

hi,
from ur description i think ur treadmills control module have problem. motor driving card and motor is ok. normally there are no serviceable part inside the controlling module ( user interface module). only thing can do is remove the controlling module, take out its board check all the micro switches( press button switches) replace it found faulty or not( remember to remove the power before). the refix it and the test the tread mill.
ok

The speed sensor on these machines have nothing to do with controlling the speed. The machine will run without it. The sensor is obviously working, since you are getting a speed reading.
The calibration is a mechanical adjustment found on the motor controller, the instructions are found under the lid as well as the meaning of the LEDs flashes on the tech sheet..
Follow the calibration procedure. If the operation is still erratic, I would suspect a defective controller.
Calibration: Press stop and speed up. Install the safety key/magnet. release the buttons. Press stop 1 time. one window displays speed, the other the calibration number. Both should be "0".
Press speed up, the treadmill should begin to move around 25-30. increase to 85, the machine should be a max speed. adjust the pot on the motor board to max speed. Some machines are 10mph, others 12mph. The tech sheet will tell you the max speed. When adjusted, press speed down. the machine will stop. Now press incline up. That will calibrate the incline. When completed, remove the safety key.
If operation is still erratic, change the motor controller.. It could be the console, but the cost of replacement makes the repair in most cases uneconomical..

horizon rct 7.6 , safety key off , replaced ,key.reed switch and board , still says safety key off ?? spoke to horizon several times and repair techs as well ,it can only be 1 of those 3 items , all switch & key tested good , must be a faulty new board ?? could it be anything else ??

best if you see the local retailer where you bought the treadmill. Obviously the switch, whick is a magnetic disc is not activating the sensor in the control panel and need to be looked at.