Question about Reebok 8050 ES Treadmill

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Speed fluctuates randomly

We bought our treadmill bought from costco in Nov 2007. After approx. 10 minutes of running the unit between 3 & 5 mph, it will randomly change speeds. The console will read 2, 4.6, 20.7, 18, 4, 9.4, etc. at random. The belt may or may not change speeds. It has been doing this for a few weeks (just after the 1 yr warranty, I imagine) and seems to be "loosing" time, each time we use it. It first started after 20 minutes of use, then 15, etc., and now less than 10.

The motor does not seem to be struggling. It does not produce any odd sounds or smells.

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Try calibrating the console. If it doesn't work, you'll need a new motor control board.

Posted on Nov 01, 2009

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2 Answers

I have a proform 580 trainer whose speed fluctuates. if it is set to 4 mph it will go down to 3.2 mph then back up to 4 mph and anywhere inbetween those speeds.


1) Tess by RUN the sofware calibration for easy diagnose, troubleshooting and fix it.
2) adjust the speed sensor, test for open or faulty, clean it and tight the plug very well. see the diagram attached.
3) Test the inclination motor for overheating Try to LUBE
4) Lube the deck belt according with the schedule maintenance.
God bless you
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Dec 18, 2012 | Proform XP 580 Trainer Treadmill

1 Answer

Precor C966i The unit turns off at random intervals. When reset it comes back on then shuts off a few minutes later. Error log is empty so not an error with software.


LUBE or wax the deck belt, this happen because you do not lube or wax your equipmente according with the schedule maintenance, you must do it, every week. Do it now.use 100% silicone lube-
2) LUBE the rollers bearing too use WD-40 for rollers b only.
3) Test the drive belt motor, and adjust it or replace
4) test the input voltage motor, if there are the motor need repair.see my personal TIPS for troubleshooting helps.
5) test the output voltage board, for input voltage motor, if there are NOT the board is faulty. see the block diagram
God bless you
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Nov 13, 2012 | Precor C966i Treadmill C 966i

1 Answer

I have an E-4 sign coming up on the treadmill. I still dont have a clue how to calibrate it or anything. i bought it over the internet and there was no instruction manual that came with it. i really need...


Dear Sir:
This is guide for software calibration in Horizon. Please see under your Hood for motor the instruction for step in calibration.
Turn the treadmill power to "On." Place the safety key in its place on the treadmill console.

  • 2 Simultaneously press and hold the incline "+" and speed "-" buttons for approximately five seconds: The console will beep and display the software version in either the "Time" window or the "Calories/Elevation" window.
  • 3 Press "Start" and allow the running belt to begin moving. The belt should start at 0.5 mph. If this speed is not the speed your treadmill starts at, adjust the speed cube screw located under the control board. Turn the screw to slowly to the right to increase the speed or slowly to the left to decrease the speed.
  • 4 Verify this speed is correct by counting the running belt revolutions per minute. At 0.5 mph, the running belt should make four revolutions in a minute for the Alpine and Advance 500 models and four-and-a-half revolutions for all other models.
  • 5 Press and hold the "Stop" button for three seconds to exit the engineering menu.
  • sincerely. God bless you.

    ernesto cuadra
    managua, nicaragua. c.a

    Feb 11, 2012 | Treadmills

    1 Answer

    The Nordic Track machine's controls seem to be stuck. If I press any button other than "3 mph", it fails to respond and nothing happens. However, when I press the 3 mph button, it will only stay at the 3...


    Remove the console from the treadmill and remove the back
    remove and replace the ribbon cables that run from the keypads to the control board (they are flat plastic strips that push into the board).
    remove and replace all the connections on the console
    reattach the console and calibrate by doing the following:
    1. With the key off press the speed + and stop buttons at the same time and hold
    2. place the key on and release the buttons
    3. press the stop key once
    4. press the speed up til it reaches 85
    5. if your max speed is 10 mph then it should read about 9.8-10.2

    If the keys will not work then the console is bad and would need replaced.

    Jul 22, 2010 | Nordic Track NordicTrack Treadmill, A2550

    1 Answer

    Healthrider r60 stops when it reaches 4mph.




    Unplug unit and remove the motor shroud you will have to do DC Amp Measurement.

    Measure on the hot DC lead (usually red) going from the controller to the drive motor. If you have a simple multi-meter with a DC amp test setting the best way to test is to put the meter inline on the red motor lead with alligator clips. If you have a more expensive clamp meter, clamp the meter around the red motor wire. Run the machine at 2.5 MPH without a person on the belt. If the motor and drive system are healthy, you should have a reading in the 2-3 amp range. Then walk on the treadmill at the same speed. With a person of average size (around 200 lbs.) you should have a reading in the 6-8 amp range if the belt is good. The readings will fluctuate more with a load but you are looking for an average reading but you shouldn't see spikes above 10 amps. If the amp readings are high without a load, you could have a problem with high resistance in the motor, a bad bearing, or over-tightened belts. Regular readings without a load but high readings with a load indicate a worn belt and/or deck.

    Jun 28, 2010 | HEALTHRIDER R60 SoftStrider Treadmill

    1 Answer

    I have a proform 785..the problem is the speed and incline decreases all of a sudden like within a minute...i raised the speed to 4 and it dropped to 2 within 1 min and same thing with the incline it...


    Unplug unit remove motor shroud then start calibration procedure.
    Press the Stop and the Speed Up keys down while inserting the safety key. If you cannot get into calibration then upper console needs to be replaced.
    Press the Stop key one time. The Time window should read EP:2P. Some newer models may also say FP, Pass, or the like. This means that it passes the EPROM test. At this point if it show 2F FF or Fail then upper console needs to be replaced.
    Press either incline key and the incline will calibrate automatically
    BE CAREFUL, THE TREADMILL WILL RUN AT FULL SPEED IN THIS NEXT MODE! DO NOT STAND ON WALKING BELT.
    Press the Speed Up key and hold it down until 85 is shown in the Distance window (some models may show the 85 number in another window).
    If the top speed of the treadmill does not match the displayed speed on the computer console, adjust the max speed potentiometer (pot) on the motor control board. This is the board that the red and black motor wires connect directly into in the motor area. The Max Speed pot is clearly labeled.
    The max speed potentiometer is a small square with a mobile center and is located in one corner of the board and is labeled MAX SPD. It is near the harness that carries the speed signal labeled H,W,L. Using a small insulated screwdriver adjust this potentiometer clockwise to speed up and counter-clockwise to slow down the max speed of the treadmill. A tiny turn of this potentiometer will make a big difference in speed so be careful when making adjustments.
    It is not important to get the speed set exactly at the max speed of the treadmill but do make sure to get the speed within .2 MPH of the max speed of the treadmill. For instance if the max speed of the treadmill is 10 MPH, make sure to have the speed set between 9.8 MPH and 10.2 MPH. Some models have a 12 MPH top speed, so please check your manual if you aren’t sure.
    After completing calibration of the speed, press the Speed Down key. The treadmill will automatically return to 0 MPH. Please allow the unit to stop completely before continuing.
    Press the Stop key once and remove the safety key.

    Jun 11, 2010 | Proform 785 CS Personal Trainer Treadmill

    1 Answer

    Manual to trouble shoot/run diognostics


    These units only have a calibration mode. The High end units generally will have that. If this is a Epic Then this calibration procedure should work.
    Press the Stop and the Speed Up keys down while inserting the safety key. Press the Stop key one time. The Time window should read EP:2P. Some newer models may also say FP, Pass, or the like. This means that it passes the EPROM test. Press either incline key and the incline will calibrate automatically. BE CAREFUL, THE TREADMILL WILL RUN AT FULL SPEED IN THIS NEXT MODE! DO NOT STAND ON THE WALKING BELT. Press the Speed Up key and hold it down until 85 is shown in the Distance window (some models may show the 85 number in another window). If the top speed of the treadmill does not match the displayed speed on the computer console, adjust the max speed potentiometer (pot) on the motor control board. This is the board that the red and black motor wires connect directly into in the motor area. The Max Speed pot is clearly labeled. The max speed potentiometer is a small square with a movable center and is located near the three small speed wire connections labeled H, W, & L and is on the same edge of the board and the red and black motor wires are located. Using a small insulated screwdriver adjust this potentiometer clockwise to speed up and counter-clockwise to slow down the max speed of the treadmill. A tiny turn of this potentiometer will make a big difference in speed so be careful when making adjustments. It is not important to get the speed set exactly at the max speed of the treadmill but do make sure to get the speed within .2 MPH of the max speed of the treadmill. For instance if the max speed of the treadmill is 10 MPH, make sure to have the speed set between 9.8 MPH and 10.2 MPH. Some models have a 12 MPH top speed, so please check your manual if you aren’t sure. THIS IS A VERY IMPORTANT STEP BECAUSE YOU WILL GET AN ERROR MESSAGE IF THIS STEP IS SKIPPED. After completing calibration of the speed, press the Speed Down key. The treadmill will automatically return to 0 MPH. Please allow the unit to stop completely before continuing. Press the Stop key once and remove the safety key.

    May 30, 2010 | Epic 425 Mx Treadmill EPTL88105 !

    1 Answer

    1-Error 2 keeps appearing on the screen 2-It


    3 possible areas that can be causing the problem speed sensor , motor control Board ( MCB ) or the drive motor. Unplug unit remove motor shroud then plug in unit now on the MCB their should be L E D s lights should be on. One of the L E D s should speed on other P W M . Start your treadmill you see the PWM light flickering thus the upper console and cable connections are good now it will go back to ERROR 1. Check the connection that leads from the motor the board with a mutli-meter insert them in the motor connectors and start the unit their should be a D C voltage out if not the board is bad and need to be replaced. If not reset your treadmill then manually start pushing the running belt2_bing.gif now the speed light should be flickering if it does then the speed sensor is good if not flickering then replace sensor. If we have a good speed sensor then I would check the Drive Motor this done unplugging the unit the disconnect the two leads coming from the motor to MCB then by using a fully charge 18v drill battery connecting the leads to the motor should move it at approx; 1 mph if no belt movement you for the most part will have worn brushes or open windings in the motor. Also I check the belt and since the majority of the problems ( 75 to 85% of time)start with lack of maintenance ( lubrication)thus causing added expense to the consumer.
    Here is a typical guide for maintenance their may be a slight variation from different manufacturers all in all the same.
    NOTE: To prevent electrical shock, be certain the treadmill is turned off and unplugged from the electrical outlet before performing any cleaning or routine maintenance. TREADBELT LUBRICATION For average use of your treadmill, factory recommends you lubricate under the treadbelt once per year. For heavy use, which is more than 10 hours per week, factory recommendation is lubricating every six months. . LUBRICATION PROCEDURE: 1. Turn off and unplug treadmill. 2. Cut off the end of the tube of lubricant. 3. Holding the tube in one hand, insert the tube underneath the treadbelt halfway between front and back and halfway between right and left. 4. Squeeze the full contents of the tube onto the deck in a circular pattern in the center 1/3 of the deck. 5. Plug in and turn on treadmill, then walk normally on treadmill at 0.5 mph for five minutes. CLEANING DAILY: Perspiration should be wiped from the control console and treadmill surfaces after your workout. CLEANING WEEKLY: You should wipe down your treadmill once a week with a water dampened, soft cloth. Be careful not to get excessive moisture between the edge of the digital display panel and the console, as this might create an electrical hazard or cause the electronics to fail. IMPORTANT: DO NOT CLEAN OR WIPE THE TOP OF THE DECK UNDER THE CENTER OF THE RUNNING BELT. MONTHLY: Clean dust and dirt that might accumulate under and behind your treadmill once a month. Small rubber particles from the soles of walking shoes will accumulate alongside the belt and also behind the unit

    May 18, 2010 | Treadmills

    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 Treadmills

    2 Answers

    My Nordic Track treadmill has has 10 speeds (1mph


    You should have a speed arrow up & down, this increases and decreases the speed in .1 mph. Try this control and see how the unit re-acts if the speed does not adjust in .1 mph increments or it stay the same either way it sounds like an upper board issue. Go to iconfitness.com go to customer service the replacement parts put you M# and will give part# and pricing.
    RULE OF THUMB: IF REPAIR IS MORE THAN THE THE PURCHASE PRICE OF UNIT DOE NOT REPAIR

    Feb 27, 2010 | Nordic Track NordicTrack Treadmill, A2550

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