Question about Exercise & Fitness

1 Answer

Sudden Variable Speed on ProForm 615 XP

I have a ProForm 615 XP that suddenly, while my husband was running on it the belt was skipping causing sudden jolting variations in speed. It is so bad that each of us felt it would cause us to fall if we tried to run on it. What do you think is the problem? Can we fix it? We are both in a 10 mile run in a week!

Posted by on

1 Answer

  • Level 1:

    An expert who has achieved level 1.


    An expert who has answered 20 questions.


    An expert that hasĀ over 10 points.


    An expert whose answer gotĀ voted for 2 times.

  • Contributor
  • 33 Answers

Dear mam,

Please check the speed sensor and Belt Tension also.


Posted on Sep 28, 2009

  • dwi fitriani
    dwi fitriani Nov 28, 2013

    please look imange sample speed sensor


1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

I have a Proform xp 615 that will work fine for about a minute and belt will stop. As soon as I step off of the belt it will run back up to speed, but will not have any power/ torque.

Hi There, This could be caused by a few things....
First, is the belt/deck lubricated and slide easily with the foot when the treadmill is off? Next, , have you noticed any odd smell like burning "something", if so, this would lead to a motor issue, which can be checked with the tread UNPLUGGED from the wall, look inside the motor brush covers, one on each side, to check the copper colored commutator for dark burned area's, and lastly, motor control boards die over time due to the work on the capacitors when the treads are in use. Unfortunately, manufacturer's decide to cut costs on capacity for overall performance which leads to issues, and you can always email gregATbuyfitnessrepairpartsDOTcom for additional help, as nobody likes a dead-tread ;o)

Feb 06, 2016 | ProForm XP 615 Treadmill

1 Answer

Proform 615 xp won't come down from folding it

I am having the exact same problem with my ProForm 615 treadmill. Spent over an hour trying to lower it.

Jun 23, 2012 | Exercise & Fitness

1 Answer

Why does the belt onmy treadmill all of a sudden stop?

What I have read before is the belt has gotten thin thus creating too much friction. By doing this, treadmill will shut down as a precautionary measure.

Jan 19, 2011 | Proform Exercise & Fitness

1 Answer

I have a proform xp 550e trademill and i changed the motor control board because the motor start running and inmediadlly stops. after i installed the board the motor start running and stop some time after...

To calibrate the speed follow these steps.
Press stop and speed up and place the safety key in its spot.
release the stop and speed up.
Press stop again. The windows on the console (speed & time) will be all zeros.
Press speed up, the time window will increase. The belt should start to move. Increase this number to 85. This is maximum speed. Adjust the potentiometer to the correct maximum speed. The console will beep until the correct speed is adjusted (+ or - .2mph).
If the machine suddenly goes dead when in use, you may have a static electricity problem.
Check that the ground pin is present on the plug and check your outlet for a proper ground connection.

Dec 29, 2010 | Proform Exercise & Fitness

1 Answer

My Proform XP 650e Treadmill starts and suddenly stops. The belt turns real fast then it suddenly shuts down like the power was turned off.

This condition is when the treadmill goes to full speed as soon as you power up the treadmill. Typically when this occurs, it is an indication of a short circuit in the motor controller.

Jun 28, 2010 | Proform XP Weight Loss 620 Treadmill

1 Answer

The belt on my ProForm Crosstrainer treadmill stops while using i

Sometimes the tread needs to be lubricated. This was the case with ours. You can get a lubrication kit at ****'s Sporting Goods or other larger sport stores and it will instruct you on how to do it.

May 13, 2009 | Proform CrossTrainer Treadmill

1 Answer

Timing belt worn

Hi ,this sounds like the timing belt is of time ,this happens when the timing marks are missalingned ,the motor will still run but it afects the performance drasticly,it can also cause major engine damage......

Aug 24, 2008 | 1991 Honda Civic

1 Answer

Sudden Speed Up and Drop

Have your transmission fluid and filter changed. That should correct the problem.

Aug 07, 2008 | 1997 Mazda 626

Not finding what you are looking for?
Exercise & Fitness Logo

Related Topics:

295 people viewed this question

Ask a Question

Usually answered in minutes!

Top Exercise & Fitness Experts

Electro Med Services...
Electro Med Services...

Level 3 Expert

6694 Answers

Sportsmith LLC
Sportsmith LLC

Level 3 Expert

914 Answers

Tom Chichester

Level 3 Expert

34170 Answers

Are you an Exercise and Fitnes Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides