I have a proform fuel pf 94 treadmill. When I push the start button it will count down to start but does not start. I can get the treadmill to run on high if I push start the belt. When I push the stop button stop the treadmill belt and when I pull the magnetic key the treadmill keeps on running. I have to turn off the power switch in order to get it to stop running. Please recommend parts and part numbers to fix. Thanks

Hi,
You have to check the Driver circuit board for the motor. There is motor control IGBT Insulated Gate Bipolar Transistor) in this board .If the IGBT is short then the treadmill will try to run without setting any value or witout safety key . You have to check the OHMS between the seocnd and third of lead of the IGBT. If it shows less than 100 Ohms then the IGBT is short and you have to replace the same. Also you have to check the connection to the control pannel. Is there is any loose conatct. Remove the connection in the motor control board which go to the control pannel and reconnect it. Also check the speed sensor. In most of the treadmill you can find the speed sensor near the motor pully. Remove the speed sensor and clean it and the refix it. Remember one thing remove the power of the treadmill and leave it for 30 minutes then only oppen the treadmill. Because there is high voltage storage capacitors in the motor control board which will hold charge for some time even after the power is disconnected. i have added the picture of IGBT for your refference. There will be a part like this in your treadmill's motor driver board. You can see the part number on it.






OK

Not sure but you will have to test all fuses on circuit board and make sure they are all ok, not damaged.
Have you tried unplugging and resetting?


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