How do I activate the manufacturer’s warranty on my machine? Horizon Fitness Updated March 12, 2021 16:04 Register your warranty either by mail or online within 30 days of purchase. Please retain proof of purchase. Horizon Fitness product registration. Was this article helpful? Yes No 0 out of 0 found this helpful Have more questions? Submit a request Related articles How do I contact Customer Tech Support? How do I contact Horizon Customer Service? Warranty Boosts (USA) I can’t find my treadmill power adapter or I damaged my power adapter. Payment & Financing (USA) Comments 0 comments Please sign in to leave a comment.