My Pro Form 580 XP slows down suddenly while on, and speeds up again almost making me fall off of it. Anyone know why this could happen? The manual is no help.

A reset button won't fix that unless you think it is a software glitch. This says it is the Speed Sensor.

https://www.google.com/search?q=Pro-form+1450+treadmill+slows+down

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possible hold downs loose or bad bearing in drum

Hi this is Jamie from FitFix.ca. You'll need a new console. You can contact Icon or Proform and they can assist in getting you the right part. Good Luck

With the motor being new and the "hot electrical" smell, I would say the motor control board, which sends the speed command to the motor, would most likely be your issue.

Dear Sir:

Adjust the speed sensor very weel see the diagram attached, tigh the connector wires very well, and clean the s. sensor very well.

2) Run the software calibration for easy diagnose , fix it, and trouble.according with your manual instructions.

sincerely. God bless you.

ernesto cuadra
managua, nicaragua.

The resistance control broke on my pro form xp 400 after 4 years of good use. A replacement console sells for $180. I just popped off the plastic rotary control and behind it was the reostat stem which can be turned with two fingers. Now I have resistance control again. Happy days are here again!

There is a knob about halfway down or up, depending on how you are looking at it. You need to lift up or push up a little bit to take the weight off the locking pin, as soon as the weight is of it should pull out about 1/2 of and inch. Be careful ALL the weight of the walk deck is now in your hands. Be prepared to lower it, and use your second hand immediatly anfter you pull the locking pin out. After the walk platform starts to come down, let go of the locking pin, it has a spring to pull it back, but the pin only fits in ONE hole in the prop rod, so it wont grab on the way down. Some treadmills have a dampening shock to allow the lowering of the walk deck slowly, and some do not. So again BE CAREFULL, this could hurt you if it falls on you.


Hope this was helpfull

If you need further help, I’m available over the phone at https://www.6ya.com/expert/matt_8dbc24bf722649ac

Hello. This happened to me when I bought a Pro-form XP 550, and the solution was very simple - There is a magnectic thingy on the front attached by a string to the treadmill. The thingy needs to be stuck to front of the treadmill for it to work. It's some sort of safety device which cuts out the treadmill if you fall off. Is that it? Stephen.

Hold the upper end of the treadmill with your right hand on the back end of the unit. Using your left hand, pull the lock knob to the left and hold it. Pivot the treadmill down until the frame is past the pin on the lock knob. Note: You may need to push the handrail to the side slightly. 2. Move in front of the back end and hold the treadmill firmly with both hands, and lower the treadmill to the floor. CAUTION: To decrease the possibility of injury, bend your legs and keep your back straight

Try going in to your power settings and change the power Scheme to "Always On". Your M processor may be slowing down.