Treadmill: Heart rate sensor isn't accurate

Inaccurate heart rate readings can be caused by faulty sensors, wiring failure or failed console display.

For the most accurate heart rate readings on treadmills with hand grip sensors, place your hands on the metal contacts and avoid moving your hands for 15 seconds while standing still on the foot rails. Make sure your hands are clean when checking your heart rate. If your heart rate appears too high or too low or if your heart rate isn't displayed, lift your hands for a few seconds and then place your hands back on the hand grip sensors. If your heart rate still isn't displayed or the displayed heart rate seems inaccurate, clean the metal sensor bars on the hand grips using rubbing alcohol and a soft cloth. Cleaning the metal sensors may allow the console display to accurately detect and display your heart rate.

If you heart rate still doesn’t display accurate after cleaning the sensors, unplug the treadmill and check the wiring connections between the heart rate sensors and the console display. Reconnect any loose wires and repair any frayed or damaged wires.

If the wires are connected properly and aren’t damaged, replace the heart rate sensor(s).

If the problem continues, replace the console display.

treadmill

These repairs may help solve your treadmill problem

Replace the treadmill console display

Replace the treadmill console display

The console displays the elapsed time, distance traveled, estimated calories burned, current speed, and the user's pulse. If the console doesn't work, replace the console display assembly.

Symptoms for treadmills

Choose a symptom to see related treadmill repairs.

Main causes: damaged walking belt, improper belt tension, lack of belt lubricant, bad drive motor
Main causes: no power, bad power cord, tripped or faulty overload switch, bad power switch, wiring failure, bad motor control board
Main causes: bad control console, wiring failure, bad motor control board
Main causes: rear roller out of alignment, damaged walking belt, bad roller
Main causes: damaged walking belt, improper belt tension, bad roller bearing
Main causes: faulty sensors, wiring failure, bad control console
Main causes: missing safety key, bad control console, wiring failure, faulty motor control board, bad drive motor
Repair guides for treadmills

These step-by-step repair guides will help you safely fix what’s broken on your treadmill.

How to replace a treadmill walking belt

A worn walking belt will begin to slow down during use. If your treadmill walking belt is worn out, replace it using these steps.

Repair difficulty
Time required
 45 minutes or less
June 1, 2015
By Lyle Weischwill
How to replace a treadmill walking board

A worn-out walking board creates friction with the walking belt and causes the belt to slow down during use. Replace the walking board if it's worn or damaged.

Repair difficulty
Time required
 30 minutes or less
June 1, 2015
By Lyle Weischwill
How to replace a treadmill drive motor

A defective drive motor won't run when activated by the motor controller. Replace the treadmill drive motor if it doesn't run.

Repair difficulty
Time required
 15 minutes or less
Articles and videos for treadmills

Use the advice and tips in these articles and videos to get the most out of your treadmill.

December 21, 2016
How to troubleshoot treadmill problems
By Sears PartsDirect staff

See what to check if you're having a problem with your treadmill, and what you can do to fix it.

June 29, 2015
Easy DIY treadmill repairs
By Sears PartsDirect staff

Learn about treadmill repairs that you can easily do yourself.

May 10, 2015
How to maintain a treadmill
By Sears PartsDirect staff

Keep your treadmill in shape by following these tips.