I lost my safety key for my Treadmill, its a Merit Fitness 715T plus Treadmill. I need to know where i can find a replacement, cant seem to find a website to purchase the key.

The belt tension is fractionally too slack.

Check here for guidance on how replace or repair your safety key:
http://www.partsfortreadmill.com/parts-for-treadmill/treadmill-safety-key/
http://www.treadmillsrepair.co.uk/2014/08/treadmill-safety-key.html

go to www.fitnessrepairparts.com and get it

God bless you

LUBE THE DECK BELT, this produce shut down by lack of maintenance in according with the instruction manual. Maybe you have a deck belt worn.

2) Lube the rollers bearing too in according with the instruction manual.

3) Test the drive belt, and see if need replace or adjust .

sincerely. God bless you.

Please Reset the C. breaker or see the fuse if has.
2) Please RETIGHT the connector coming from the Controller board Motor from the hood, UPPER lever where the console connector is there very well, See if there are some wires loose, or desolder, and cleaned very well.
3) If everything is right, TEST the 8-12Vdc to the Console Board. if there the Console Board is Faulty.
If there are NOT the Controller board is Faulty, and Replace, since some IGTBs is faulty.
LED Blink Patterns on the Control Board Treadmill
Blessing.
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cell+whatsAPP:+50588611441

I would think that it can't hurt anything to try another magnet but if you end up needing to buy another one here is one website that sells them: Sportsart TR20F safety key

You can get the manual on the link below. Just scroll down to product details then click on manual.

http://www.amazon.com/Horizon-Fitness-730T-Merit-Treadmill/dp/B000GVKBUW

Good Luck please rate 4 thumbs up and please leave a testimonial

Merit 725T. The treadmill has gone into a "10 degree" incline mode on its own, and will not respond to the control panel

console is malfunctioning and needs replaced