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Treadmill speed changes constantly on it's own

The problem with my treadmill is that it starts out fine, but then without my adjusting the speed and without warning it suddenly speeds up or slows down or comes to a complete stop. There's seems to be no predicting when it will happen, only that it will and it will frequently drastically change pace. The accusmart continues to read out, but does not reflect the change in speed. I have back and neck disc issues and can not afford all of the sudden start and stops. What part of my treadmill is broken and how do I replace it?

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6ya6ya
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Posted on Jan 02, 2017

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  • 95 Answers

SOURCE: Treadmil stops or slows down upon walking.

Check both belts to be sure they are adjusted and not slipping.Check the underside of the walk belt to see if it feels frayed in the center as compared to the edges, the center always wears more than the edges a really worn belt must be replaced. if it is nor worn there is a wax lubricant for proform treadmills that can be purchased at retail stores that sell treadmills.Sears, dicks sporting goods and also treadmilldoctor.com are good places to buy it.

Posted on Aug 01, 2009

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maxtreadmill
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SOURCE: no manual for a weslo cadence 2300 accusmart

go to iconservie.com click on manual input this infoWESLO THEN M# (WL23001)

Posted on Jun 13, 2010

AJIN G
  • 6694 Answers

SOURCE: Treadmill seems to start out OK but after maybe 2

hi,
check the motor and the motor controlling card. check the motor is it over heating or not. also check the speed sensor beside the motor pulley. clean the speed sensor and refix it. then test again
ok

Posted on Jan 01, 2011

SOURCE: I have MaxPro treadmill when I start to any prog. speed change suddenly to 14KM and you change back to any speed it goes back to 14 again

i dont know about yours but ours has panel that will light codes to call company on. it is on bottom under lid for motor. you can check there.

Posted on Feb 23, 2012

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2 Answers

My treadmill runs for 9 secons and stops and shows E1


Ok. So the first thing to try is to calibrate the speed.
You do this by doing the following:
  • With the SAFETY KEY in place, hold the ELEVATION UP and SPEED DOWN buttons for five seconds. The console will beep twice, "ENG0" will appear in the Distance window, and a number will appear in the Elevation window.
  • Press SELECT until "ENG3" appears; this is for Auto-Calibration.
  • Press START to Auto-Calibrate.
  • The treadmill will calibrate minimum and maximum speed, and minimum and maximum elevation. When Auto-Calibration is complete, the treadmill will reset to User's start screen. This process takes three to five minutes.
Make sure there are no errors. . .and that the speed goes from super slow to super fast and then stops. . .. if it stays slow. . or stays fast. .or error code appears during calibration, there is a problem.
If after a good calibration sequence, if it still does the stopping and E-1 after 10 seconds. ., then you need to (Power off and disconnect treadmill). . .then unplug the speed sensor from the lower power board, blow into the connector on the wire, and add a little contact cleaner spray to the connector on the board.
Recap: If it actually runs. . .but stops after a few seconds. . but the calibration runs and passes fine. .. .more than likely it is a speed sensor misread or a faulty speed sensor.

Sep 30, 2014 | Triumph 400T Treadmill

1 Answer

Lose speed the treadmill


Hi david

Have you serviced your treadmill ?
Have you used lube on the treadmill ?

Sep 20, 2014 | Exercise & Fitness

1 Answer

Precor 9.27 treadmill won't slow down


Hi, It's probably the speed censor. Clean it up and should be good to go. When you disasemble it clean all other parts and put back togeather. Good luck

Jan 23, 2014 | Precor 9.27 Treadmill with Ground Effects...

1 Answer

Treadmill speed varies with or w/o load. Belt not loose. Led speed indicator constant.


0ed98914-d0ff-4c07-aa5a-486eca10f03f.gif1) adjust the speed sensor see the diagram, clean the sensor very well, tight the connector very well.
2) LUBE the deck belt with silicone or wax READ your owner manual,

God bless you

Jun 03, 2013 | Sportcraft Tx5.0 Tx 5.0 Rc Treadmill Motor...

1 Answer

Precore m9.43 treadmill error 22


Precor Error Code 22 Error Code: 22 Manufacturer: Precor
Model: All Models
Error Description: Error 22, No Motor Pulses at Start Up - Error indicates that the display has sent a command for the drive motor to start, however, the speed sensor has not returned the signal acknowledging that the drive motor has started. Possible Reason:
  1. The line of sight between the speed sensor and the speed sensor target is obstructed.
  2. Badly worn drive motor brushes.
  3. Incorrect gap between the speed sensor and the speed sensor target.
  4. Incorrect adjustment of the speed sensor potentiometer (when equipped).
  5. Inoperative speed sensor.
  6. Faulty lower PCA.
  7. Faulty interconnect cable between upper and lower PCA.
  8. Faulty upper PCA.
Recommended Action:
  1. 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.
  2. Bady worn drive motor brushes cannot make proper contact with the motor commutator, therefore the drive motor will not start when voltage is applied. Inspect and replace drive motor brushes if necessary.
  3. 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".
  4. 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.
  5. An inoperative speed sensor will allow the drive motor to start and run briefly before the error appears. If able to access the speed sensor wiring, measure the DC voltage between the speed sensor leads. Two of the leads will always read about 5 VDC. Two will toggle between 0 and 5 VDC as you slowly turn the speed sensor target. If both measurements are not seen, the speed sensor needs replaced. Some units have the speed sensor mounted on the lower PCA and the lower PCA needs replaced.
  6. Determine if the lower PCA is bad by swapping with a known good lower PCA.
  7. Determine if the interconnect cable is bad by swapping with a know good cable.
  8. Determine if the upper PCA is bad by swapping with a know good upper PCA.
Precor Error Code 22

Feb 05, 2013 | Precor 9.21 Treadmill

1 Answer

Precore m9.43 treadmill error 22


Precor Error Code 22 Error Code: 22 Manufacturer: Precor
Model: All Models
Error Description: Error 22, No Motor Pulses at Start Up - Error indicates that the display has sent a command for the drive motor to start, however, the speed sensor has not returned the signal acknowledging that the drive motor has started. Possible Reason:
  1. The line of sight between the speed sensor and the speed sensor target is obstructed.
  2. Badly worn drive motor brushes.
  3. Incorrect gap between the speed sensor and the speed sensor target.
  4. Incorrect adjustment of the speed sensor potentiometer (when equipped).
  5. Inoperative speed sensor.
  6. Faulty lower PCA.
  7. Faulty interconnect cable between upper and lower PCA.
  8. Faulty upper PCA.
Recommended Action:
  1. 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.
  2. Bady worn drive motor brushes cannot make proper contact with the motor commutator, therefore the drive motor will not start when voltage is applied. Inspect and replace drive motor brushes if necessary.
  3. 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".
  4. 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.
  5. An inoperative speed sensor will allow the drive motor to start and run briefly before the error appears. If able to access the speed sensor wiring, measure the DC voltage between the speed sensor leads. Two of the leads will always read about 5 VDC. Two will toggle between 0 and 5 VDC as you slowly turn the speed sensor target. If both measurements are not seen, the speed sensor needs replaced. Some units have the speed sensor mounted on the lower PCA and the lower PCA needs replaced.
  6. Determine if the lower PCA is bad by swapping with a known good lower PCA.
  7. Determine if the interconnect cable is bad by swapping with a know good cable.
  8. Determine if the upper PCA is bad by swapping with a know good upper PCA.
Precor Error Code 22

Feb 05, 2013 | Precor 9.21 Treadmill

1 Answer

Lifetrack OMA-117 treadmill constant beeping not moving


1) adjust the REED swithc , see the diagram clean , and tight the wires connector very well.

2)Try to RUN the software calibration for diagnose, and troubleshooting.

God bless you
6_30_2012_1_23_13_am.gif

Jun 29, 2012 | Exercise & Fitness

1 Answer

Spontaneous starting


Adjust the speed sensor, clean, and tight very well the connector. See the diagram attached.

Of course RUN the software calibration after you fix it the s.sensor. for diagnose and troubleshooting easy.

sincerely. God bless you
5_3_2012_7_39_35_am.gif

Apr 29, 2012 | Proform 785 Treadmill

1 Answer

Speeds up and slows down


Dear Sir:

Please adjust the sensor speed for the main motor. Of course I am recommending Very Strong to RUN the software calibration for easy diagnose and troubleshooting.

Otherwise see my personal TIPS, for diagnosee
Trouble.

sincerely. God bless you

ernesto cuadra
managua, nicaragua. c.a

Mar 06, 2012 | Nordic Track NordicTrack A2550 PRO...

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