speed still too fast after calibration

I have a Reebok ACD3 treadmill. I hadn't used it for a few weeks and now it seems to be running fast. I thought maybe I had just lost some fitness but my daughter got on it when she came back from college for a weekend and said the same thing. I had not even said anything to her.
So I recalibrated it with the top speed calibrated to 10 mph and the calibration process went fine.
But it still seems to be running fast especially at the low speeds. For example 3 mph is not an easy walk. It is quite brisk . Not a run or difficult but certainly not the way you walk from your car to the store. If I had to guess I would say it's running .5 to .75 mph faster than what the display says.
Rather than a new control board is there anything else I can try?


  • Have you adjusted the max speed pot just a little during calibration.
  • Yes, as part of the calibration process, the max speed adjustment pot is adjusted so that the speed display reads "10" (or as close to 10 as you can get it--- it fluctuates a bit between 9.9 and 10). So the calibration went fine but it just seems to be running fast.
  • You try to back down a little more on the max speed pot to slow it down some more.
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