Hi, I have a NordicTrack Treadmill, A2050. When the unit is turned on, it has become very loud. The faster it goes the louder it gets. At higher speeds it sounds like it is going to explode. Any ideas? Is it the motor? I actually works fine, but it is so loud we can't hear anything while working out. Thanks for any tips!

Unplug unit then remove motor shroud then plug unit in then start treadmill your going to use a flat tip screw driver as a stethoscope. Now place the flat on the motor at edge close to the flywheel put your on the handle your ear and you should be able hear if the loud noise form the bearing if not, then repeat procedure on the other end by the fan if the noise is pin pointed on the motor then replace motor, if not originating from the motor the proceed to the front roller.
Use a flash light and observe and locate the font roller shaft so that you can comfortably rest the tip without it slipping on either end of roller.
As before repeat the procedure that was performed on the motor if noise originated their then replace roller if not proceed to rear roller.
Use you flash light and look the adjusting bolts where the end caps are the proceed to insert the screw driver and make contact with the tension bolts listen to each side.
You should locate noise with this procedure take your time and be careful