JLL S300 - burning smell and crackling motor

After more than 30 mins use a burning smell occurs. I thought it might just be the friction on the running belt as that gets hot (I use silicone lubricant on the gap between the running belt and the board). I took the motor casing off after one run and there was a distinct crackling sound coming from it, like how oil spits in a frying pan, plus it was burning to the touch.

Should also mention that the running belt has taken to slipping when using it at high speeds, whether I lubricate it or not. There's no slack in the running belt or the belt that connects it to the motor.

What do?


  • Could be a bad motor or motor controller and belt may be worn out also. What model treadmill is this.
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