u/SomeEndUser

Help Troubleshoot Horizon Fitness 7.0AT. Already replaced MCB.

We have this treadmill and it's 6 years old. In Dec 2025 it stopped working and the MCB blinked 4 times.

A new MCB from Horizon was $450, about half of the treadmill itself. So I opted for one on eBay.

This worked for about 35 days and now the MCB blinks again 4 times.

Should I try replacing this board again? Or could a bad motor "burn" out these boards?

Or should we just junk it and get a different brand treadmill?

reddit.com
u/SomeEndUser — 22 hours ago