I bought a Tunturi T60, from fitness depot and had speed sensor error come up while under warranty. Fitness depot's repair department came and told me it was the motherboard 3+months later after calling every week finally got a "new" motherboard from another machine. Another repairman comes out installs the motherboard and then tells me it is the speed sensor...so still no working treadmill.
I would not buy another Tunturi or another product from fitness depot. Good luck if you do!