Brand new treadmill, just set it up. When you increase the speed greater at 1.5mph, you hear a thumping noise towards the back of the treadmill, very rhythmic in sound, similar to sound of a heartbeat just louder. treadmill has been calibrated and passed, but sound remains and if you increase speed higher, sound remains just occurs more often but carries same rhythm.
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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
Precor Error Code 26
Error Code: 26
Model: All Models
Error 26, Motor Pulse Width Incorrect - Observation of the speed sensor signal and verification the signal from the speed sensor is appropriate for the requested speed. If an incorrect or erratic speed sensor signal is detected the error appears.
The line of sight between the speed sensor and the speed sensor target is obstructed.
Incorrect gap between the speed sensor and the speed sensor target.
Incorrect adjustment of the speed sensor potentiometer (when equipped).
Damaged speed sensor target.
Using a static safe vacuum cleaner, carefully vacuum out the drive motor compartment. Be sure to thoroughly clean the area between the speed sensor and the speed sensor target.
Inspect the gap of the speed sensor to the speed sensor target. Proper gap is 3/16" and the speed sensor photo eye should be aimed at the larger portion of the targets wedge shaped section. If unit has a magnetic speed sensor, the gap between the end of the sensor and the flywheel tooth needs to be 3/16".
Locate the speed sensor potentiometer (when equipped) on the lower PCA. Set the speed sensor potentiometer to mid-range. Start the treadmill and increase speed to 6 mph. Carefully adjust the speed sensor potentiometer until the treadmill is operating the smoothest. Increase the speed to full speed and again adjust the speed sensor potentiometer until the treadmill is operating the smoothest. These two adjustments are typically small and are generally only a matter of fine tuning.
Inspect the speed sensor target for any scratches or tears that could cause incorrect readings. Replace the speed sensor target if
simple(maybe). go to the rear of treadmill,get the allen wrench that came with it,run at med-slow speed and adjust the rear roller with allen wrench. 1 turn per side 2 or 3 time then walk on belt until wont slip. all the problem is belt tension. also. make sure if it need lubrication under board and belt(some are lubless others dont).
It sounds like you have a drive motoer failing. The only other place that can be load or making noise is the front and rear roller. The rollers bearings when failing make a "popping" or "clicking" noise, and increases as you speen up. The motor "growls", and the faster you go the noise is..... well loud. The way to confirm this is to remove the motor hood, then start the treadmill on power/speed level 3. Be very carefull, and use a broom stick (wooden) to put on the drive motor while it is running. You should be able to "feel" what you are hearing. You should then raise the speed, and you will then feel the increase as well.
If u r seeing the increasing variation takeing effect on the panel but the speed does not increase in real, then there is nothing wrong with the push button for sure.
what it could be is ,
1. Your motor is getting overheat quickly and does not accept the higher speed commands.
2. it could be a belt slip also (do u hear any extra noice / vibration when u increase speed)
3. next time, pls unplugg the unit for atleast 4 hrs and when u start after that increse the speed very next moment and see if it works. if it does increase this way then it is time take look first on the belt ans then check the motor.
if the unit gradually increase speed then upper function pad speed up is shorting some manufacturer will sell the keypad and overlay some will sell the entire console.
Now if the unit running like a bat out of hell then the motor control board is defective and needs to be replace
OPEN MOTOR SHROUD SO YOU CAN BETTER INSPECT THE UNIT CHECK THE DRIVE BELT THEN I WOULD CHECK THE RUNNING BELT TO SEE IF THEIR IS ANY DEBRIS THAT THE BELT ITSELF IS SPLITTING SINCE YOUR SAY A THUMPING SOUND. SINCE KEYS FITNESS MADE THIS UNIT THEY ARE NO LONGER IN BUSINESS, BUT TREADMILL DOCTOR HAD PURCHASED THE PARTS. SO GO TO TREADMILL DOCTOR.COM THEY MAY HAVE THE PARTS YOU NEED