What’s the difference between the T4 and the T4S?Both models have a 3.0 HP brushless motor, a 20 x 55 inch running surface, speeds up to 10 mph, and inclines up to 12%. The T4S has a 10-inch touchscreen with 25 pre-built programs, pre-loaded entertai

What&#x2019;s the difference between the T4 and the T4S? Both models have a 3.0 HP brushless motor, a 20 x 55 inch running surface, speeds up to 10 mph, and inclines up to 12%. The T4S has a 10-inch touchscreen with 25 pre-built programs, pre-loaded entertainment apps, smartphone mirroring, and Bluetooth audio through the treadmill&#x2019;s speakers. The T4 has an LED console and a tablet holder.What are the speed and incline ranges, and what&#x2019;s the maximum user weight? Speed ranges from 1.0 to 10 mph in 0.1 mph increments. Incline ranges from 0 to 12% in 1% increments. The maximum user weight is 300 pounds (136 kg).How much space do I need, and how much does the treadmill weigh? Keep at least 78 inches of open space behind the treadmill and 24 inches on each side. Leave 12 inches in front for access to the power cord and switch. The T4 weighs about 202 pounds and the T4S about 207 pounds. Assembled, the T4 is about 47.7 inches tall and the T4S is about 54.1 inches tall.How do I fold and move the treadmill? Before folding, set the incline to 0, turn the power switch off, and unplug the power cord. To fold, lift the deck with your legs until the air cylinder locks and you hear a click, then gently pull back on the end caps to confirm it&#x2019;s secure. To unfold, make sure the floor underneath is clear, press the air cylinder with your foot to release the deck, and step back while it lowers. When folded, the treadmill measures 48 x 35.8 x 57.7 inches. Before tilting it onto its side to move it, reinstall the packing strap that came with the treadmill.How do I assemble the treadmill? We recommend at least two people for unboxing and assembly. Assembly requires the hardware pack and the included Allen wrench. Follow the step-by-step instructions in the user manual. To attach the 10-inch touchscreen (T4S) or the tablet holder (T4), follow the instructions in the console or tablet holder manual that came with it.Where is the serial number? You&#x2019;ll find the serial number on a white label on the console or base frame near the power switch. Have it ready when you contact support or submit a warranty claim.What warranty comes with the treadmill? The residential warranty covers the motor and frame for a limited lifetime, parts for 5 years, and labor for 1 year.How do I submit a warranty claim? Have your serial number, proof of purchase, and purchase date ready, then contact our support team. Support is available Monday through Friday, 8 a.m. to 5 p.m. Pacific, at 877-738-1729 in the US or +1 714-738-1729 outside the US.What is the Safety Key, and how do I use it? The Safety Key must be inserted for the treadmill to run. Clip its red clip to your clothing, directly in front of the key. In an emergency, pull the key out to stop the belt and shut off the treadmill immediately. If the key is removed or not inserted, the treadmill won&#x2019;t operate and displays &#x201C;Please Reinsert the Safety Key&#x201D; or error code E40. Store the key out of reach of children when the treadmill isn&#x2019;t in use.What safety precautions should I follow? Read the full user manual before your first use, and inspect the treadmill and test its features before each workout. Always wear running shoes and avoid loose clothing that could get caught. Hold the handrails when you change settings, stand on the side platforms when starting, and step onto the belt once it&#x2019;s moving. Keep your hands away from moving parts, and never leave the treadmill plugged in while unattended. Don&#x2019;t use it outdoors, near water, in high humidity, or while it&#x2019;s covered by a blanket or anything else that blocks airflow. If you feel dizzy, nauseous, faint, short of breath, or have chest pain, stop right away and consult a physician. The heart rate monitor may not always be accurate.Who can use the treadmill? Only one person should use the treadmill at a time, and it&#x2019;s designed for home use only. Keep children and pets away at all times, and don&#x2019;t allow children under 14 to use it. People with disabilities should only use the treadmill with a qualified person or physician present. Consult your physician before starting any exercise program, especially if you&#x2019;re over 35 or have a pre-existing health condition.What kind of power does the treadmill need? In the US, the treadmill needs a 15-amp, 120V grounded outlet. Plug it directly into the outlet. Don&#x2019;t use a GFCI wall outlet, an adapter, an extension cord, a generator, or a UPS power supply. Route the power cord away from moving parts. Models for 220V outlets require a 10-amp circuit.Why won&#x2019;t my treadmill turn on? Start with the basics. Make sure the power cord is securely plugged into a grounded outlet that isn&#x2019;t a GFCI outlet, and that the power switch is on. Check that the Safety Key is fully inserted, since the treadmill won&#x2019;t run without it. If it still won&#x2019;t turn on, switch the power off, wait a few minutes, and switch it back on. If the problem continues, contact our support team.What do the error codes mean? When the console detects a problem, it displays an error code in the heart rate window. E40 means the Safety Key isn&#x2019;t in place, so make sure it&#x2019;s inserted and undamaged. E05 indicates an undervoltage problem, so check your power supply and make sure the cord is secure. E22 means the console and motor control board aren&#x2019;t communicating, so switch the power off, wait two minutes, and switch it back on. E31 means the treadmill has overheated, so let it cool before continuing. E01 means the motor is overloaded. Check whether any part is stuck, and try lubricating the belt. If you smell burning or hear an unusual motor sound, stop using the treadmill and contact support. For any code not listed here, or if the problem continues, contact our support team.How do I maintain the running belt? To check the belt tension, lift the belt in the middle of the running surface. It should lift 2 to 3 inches off the deck. To check centering, set the incline to 0 and the speed to 3.0 mph, then watch whether the belt drifts to one side. Adjust tension and centering with the included Allen wrench, following the table in the manual. Lubricate the belt every 6 months for light use (under 3 hours a week), every 3 months for medium use (3 to 5 hours a week), and every 2 months for heavy use (over 5 hours a week). Keep the deck and belt clean, and power the treadmill off for at least 10 minutes after every 2 hours of use.Still need help? Reach out to us at <a href="mailto:hello@centr.com">hello@centr.com</a> and our team will be happy to help.

FAQs

Treadmill Base. Models: T4B-110.1 & T4B-220.1. User Manual - English (2025-04-14). User Manual - French (2025-09-05). Service Manual - English (2025-06-30). Go to Console Options

Treadmill BaseModels: T4B-110.1 &amp; T4B-220.1<a href="https://cdn.shopify.com/s/files/1/0597/5936/2153/files/80331-EN-V2025-04-14_UM_CENTR_T4B.pdf?v=1748371647" target="_blank" rel="noopener noreferrer">User Manual - English</a> (2025-04-14)<a href="https://cdn.shopify.com/s/files/1/0597/5936/2153/files/80331-FR-V2025-09-05_UM_CENTR_T4B.pdf?v=1757534227" target="_blank" rel="noopener noreferrer">User Manual - French</a>&#xA0;(2025-09-05)<a href="https://cdn.shopify.com/s/files/1/0597/5936/2153/files/80420-EN-V2025-06-30_SM_T4B-110_and_220.pdf?v=1751918167" target="_blank" rel="noopener noreferrer">Service Manual - English</a> (2025-06-30)<hr>Go to&#xA0;<a href="https://help.centr.com/en-US/articles/consoles-303131">Console Options</a>

Manuals

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