String you along until it's out of warranty
I bought an F63 treadmill in 2022. The speed it ran at was never anywhere near accurate and it would occasionally come to an abrupt and dangerous halt. I called customer service and they sent me a new motor controller for me to fix the machine. I installed it and the same things kept happening but the frequency of dangerous, rapid stops increased over time. I called customer service again and they told me to lube the belt more, so I did. Same thing kept happening. Call them back again... This time they want to send me a motor to replace but claim the rest of the machine is out of warranty. I believe the first time I called it was under warranty but I've now been strung along as a sole treadmill maintenance guy so long that it's no longer under warranty. Awesome. I'm not fixing their terrible and dangerous machine any more. I would not recommend you buy this machine. It is dangerous and unpredictable.