Symptoms
- Monitor screen is blank
- Monitor turns on but shows no speed or stroke data
- Numbers freeze during rowing
- Monitor turns off shortly after starting
Likely causes
- CommonDead or weak batteriesMost rowing machine monitors run on batteries that need periodic replacement.
- CommonSensor not detecting flywheel movementA magnetic sensor near the flywheel reads your stroke rate and speed; dust or misalignment can block the signal.
- PossibleLoose sensor wireThe cable from the sensor to the monitor can loosen or fray with use.
- PossibleMonitor software freezeLike any small computer, the monitor can freeze and need a reset.
- Less commonFailed monitor unitThe display board can fail outright after years of use.
What to do
- Replace the monitor's batteries with a fresh set, even if the old ones aren't fully dead.
- Locate the sensor near the flywheel and wipe away any dust or debris blocking it.
- Check that the sensor sits at the correct distance from the flywheel magnet, per your manual's spec.
- Follow the sensor wire back to the monitor and confirm the connector is fully seated.
- Remove batteries or unplug for a minute to reset the monitor, then power back on.
- Row a few strokes and watch whether the monitor picks up stroke data at all.
- If it still shows nothing after these checks, the sensor or monitor unit likely needs replacement.
Tools and parts
Rowing machine monitor batteriesSearch: “AA or AAA batteries”
Rowing machine sensorSearch: “rowing machine speed sensor replacement”
When to call a pro
Contact the manufacturer for a replacement sensor or monitor if fresh batteries and sensor cleaning don't restore readings.
Safety
Generally low risk
Generally low risk for a careful person. Stop if anything looks different from what this guide describes.