How can I fix my fitness gear 820 treadmill?

The heart rate handles no longer work. On the display it stays at 0 under heart rate but the speed display works. All the rest of the panel is operational. the only difference that I noticed is when I first plug it in, a number, 102 displays then goes to 3 dashes. Then I can select the program and the time. Once in a while if I grab the bar where the heart rate pads are the belt will stop momentarily, Ive learned not to grab them anymore. If you can not tell me how to fix it, can you give me a contact number to call in the Auburn Hills Michigan area.

Thanks