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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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5 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 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

maxtreadmill
  • 832 Answers

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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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

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

What is an Error 22, 23,and 26 on a precor 9.35?


Error 22 indicates that the drive motor (running belt) has been instructed to start, by either manual or program control, and the monitoring system has not received any response from the speed sensing system indicating that the drive motor has started.
Error 23 indicates that the speed sensor signal was lost while the treadmill was in operation
Error 26 this error monitors the speed sensor signal and verifies the the speed sensor signal is appropriate for the requested speed. If the speed sensor signal is incorrect or erratic an Error 26 will be displayed.
Unplug unit and remove motor shroud and try these procedures:
The treadmill utilizes an optical (infrared) speed sensor and the line of sight between the speed sensor and the speed sensor target is obstructed. The speed sensor position relative to the speed sensor target is incorrect. The speed sensor potentiometer adjustment is incorrect (when equipped). The speed sensor target is damaged
Carefully, vacuum out the drive motor compartment with a static safe vacuum cleaner. Pay special attention to the area between the speed sensor and speed sensor target. Adjust the speed sensor position so that the space between the speed sensor and the speed sensor target is 3/16 inch and so that the speed sensor photo eye is aimed at the larger portion of the targets wedge shaped section. On hall effect speed sensors (magnetic sensor) the space between the end of the speed sensor and the flywheel tooth should be 3/16 inch. If the treadmill utilizes a speed sensor potentiometer, locate the speed sensor potentiometer on the lower PCA. Set the speed sensor potentiometer at mid-range. Start the treadmill and increase the speed to 6 mile per hour. Carefully adjust the speed sensor potentiometer to the point where the treadmill is operating the smoothest. Increase the treadmills speed to full speed at repeat the previous adjustment. These two adjustments are typically small and are usually only a matter of fine tuning. . Most speed sensor targets consist of a circular arrangement of alternate black and silver sections. If the speed sensor target is torn or badly scratched the speed sensor may receive an incorrect reading. Replace the speed sensor target.

Jun 25, 2010 | Precor 935 Premium Series Treadmill

1 Answer

Treadmill automatically speeds up upon start up


If you have a unit where the speed can be adjusted with 1 mph increments 0 to 10 and with speed up or down .1 mph increments . it sound like the key pad itself is causing this problem. Depending on manufacturer you can purchase the keypad/overlay and some will want you to purchase the entire display.

Mar 01, 2010 | Proform Exercise & Fitness

1 Answer

Can you tell me what Err22 is? Thanks!


Description
Error 22 indicates that the drive motor (running belt) has been instructed to start, by either
manual or program control, and the monitoring system has not received any response from the
speed sensing system indicating that the drive motor has started.
Possible Causes
1. The treadmill utilizes an optical (infrared) speed sensor and the line of sight between the
speed sensor and the speed sensor target is obstructed.
2. Drive motor brushes are bad.
3. The speed sensor position relative to the speed sensor target is incorrect.
4. The speed sensor potentiometer adjustment is incorrect (when equipped).
5. The speed sensor is inoperative.
6. The lower PCA is bad.
7. The lower PCA to upper PCA interconnect cable is bad.
8. The upper PCA is bad
Possible Remedies
1. Carefully, vacuum out the drive motor compartment with a static safe vacuum cleaner. Pay
special attention to the area between the speed sensor and speed sensor target.
2. If the motor brushes do not make sufficient contact with the motor commutator, the drive
motor will not start when drive voltage is applied. Replace both drive motor brushes.
3. Adjust the speed sensor position so that the space between the speed sensor and the speed
sensor target is 3/16 inch and so that the speed sensor photo eye is aimed at the larger
portion of the targets wedge shaped section. On hall effect speed sensors (magnetic sensor)
the space between the end of the speed sensor and the flywheel tooth should be 3/16 inch.
4. Locate the speed sensor potentiometer on the lower PCA. Set the speed sensor
potentiometer at mid-range. Start the treadmill and increase the speed to 6 mile per hour.
Carefully adjust the speed sensor potentiometer to the point where the treadmill is operating
the smoothest. Increase the treadmills speed to full speed at repeat the previous adjustment.
These two adjustments are typically small and are usually only a matter of fine tuning.
5. If the speed sensor in inoperative the drive motor will start and run briefly before the error 21
occurs. If it is possible to access the speed sensor wiring, measure the D.C. voltage between
the speed sensor leads Two of the leads will constantly read approximately 5 Vdc. Two of the
leads will toggle between 0 Vdc. and 5 Vdc. as you slowly rotate the speed sensor target. If
you do not see both measurements above, the speed sensor is inoperative and must be
replaced. In some cases the speed sensor is mounted on the lower PCA and the the lower
PCA must be replaced.
6. Substitute a known good lower PCA to determine if the lower PCA is bad.
7. Substitute a known good interconnect cable for the existing cable.
8. Substitute a known good upper PCA to determine if the upper PCA is bad.

Oct 27, 2009 | Precor 9.21 Treadmill

1 Answer

Manual Treadmills vs. Motorized Treadmills


Treadmills come in two basic varieties, just like lawnmowers: manual and motorized. But, unlike a lawnmower, you will generally get a better workout from a motorized treadmill. Manual Treadmills - Getting Going On a manual treadmill, the action of your feet against the deck moves the belt. Pros * You provide all of the motive power and exercise your lower body. Cons * It can be difficult to get the belt moving intially. That straining against the belt can stress your joints. * You may have to raise the incline of the treadmill significantly to make it easy enough to get the belt moving. * Once the belt is moving, however, you would have to stop and get off to change the incline, so you are stuck with one incline level during each workout. Motorized Treadmill Advantages * The belt is moved by the motor, you don't have to strain to start it. * On many treadmills, you can adjust the speed and incline while you are still walking or running. On others, you may have to get off and adjust the incline manually, but you just have to turn on the treadmill to start the belt again. Manual Treadmills - Speed With a manual treadmill, you go only as fast as you push yourself. If you slow, it slows. If you stop, it stops. Motorized Treadmill Speed and Workouts The speed is adjustable and many motorized treadmills have workout programs that adjust the speed to give you a varied workout. This pushes you to go faster. The constantly moving belt of a motorized treadmill motivates you to keep up. Costs Manual treadmills are relatively inexpensive, in the $100-200 US range. Motorized treadmills for home use cost from $750-$5000, and generally the more you pay, the better you get. Most motorized treadmills under $1000 have underpowered motors and are less sturdy and have fewer options for adjusting the incline, programmed workouts, etc.

Dec 01, 2008 | Endurance TF3i Folding Treadmill

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