What do Ineed to buy to make my treadmill advance evenly and not slow down and speed up?

Hi,

if the machine slows down when you get on it, there might be a motor issue or problem with a bad circuit within the treadmill.

Thank you.

try to calibrate the speed on the treadmill look in the trouble shooting section of the manual

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

Please LUBE deck belt + rollers bearing too
2) test the input voltage motor, if there are the motor need repair.
3) test the output voltage board, for input voltage motor, if there are NOT the board is faulty.
God bless you

worn belt and deck

You need to regularrly wax your treadmill. Buy the liquid wax to re-lube the track.

I got the same problem. Thinking about cleaning the speed sensor. Ever figure it out?

It sound like the Motor Control Board is failing call Life Fitness @ 1-800-351-3737 they will give you additional information and locate a servicer in your area

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.