treadmill question ????

hi all, i did my treadmill today for 30 minutes at 2.5 mph. it is too slow for me but it seems it wants to shut off when i am doing it at 3.5 mph. am i over heating it? any ideas? we have carpet. do i need a board under my treadmill to give the motor air?  any thoughts on this one?  thanks ,, anita

not sure why your treadmill would want to shut itself off, never heard of that before. I usually start out at 2.5 for about 3 min then go to 3 then up to 3.5 - 3.7, thats about as fast as I can go otherwise my knee starts bothering me. You probably need to get your motor checked out, I have mine on carpet but I know your suppose to have it on a rubber matt because of shocks. Alsopluged into a surge protector. Hope this helps, Debra 

i wish i knew why also. i usally do a warm up going 2.5 for 5 minutes then i increase the speed. yeah i might need the motor checked out but have to wait on that. i dont have mine on a rubber matt. i have mine plugged into the normal socket. might have to get a surge protector just in case. i havent done my treadmill lately kindof gave up on it.. i shouldnt be doing that. will try my treadmill again soon. thanks for answering.. anita