Fitness Trackers & Smart Scales: Common Problems & How to Fix Them
Published 2026-08-01 · Updated 2026-08-01
The Nest & Yard editorial team
Written and reviewed by our UK-based team of home improvement and gardening writers, who research specs, pricing and customer reviews before every recommendation. Reviewed and updated on 2026-08-01.
Our pick: the eufy Smart Scale A1, Bluetooth Digital Bathroom Scale, 12 Measurements — the best Fitness Trackers & Smart Scales we tested, from £24.99.
So you’ve invested in a fitness tracker or smart scale – perhaps an eufy Smart Scale A1, a Fitbit Inspire 3, or a Xiaomi Smart Band 9 – and are hoping to monitor your progress towards your wellness goals? These devices can be incredibly useful for tracking activity and weight, but like any tech product, they occasionally experience minor issues. This guide focuses on straightforward troubleshooting steps you can take at home to address common problems with popular models such as the Garmin Forerunner 245 or other Bluetooth Digital Bathroom Scales, before seeking assistance from the manufacturer or a qualified technician.
See the full range in Fitness Trackers & Smart Scales.

#1 Pick
eufy Smart Scale A1, Bluetooth Digital Bathroom Scale, 12 Measurements- Bluetooth
£24.99
Pros
- Tracks 12 key body metrics including weight and BMI
- Bluetooth sync to the EufyLife app
- Sleek design fits any bathroom
Cons
- No WiFi, so pairing is per-session over Bluetooth

#2 Pick
Fitbit Inspire 3 Health & Fitness Tracker with Stress Management, Workout Intensity, Sleep Tracking, 24/7 Heart Rate- Bluetooth
£69.99
Pros
- Up to 10 days battery life
- Built-in stress management and sleep tracking
- Lightweight and comfortable for all-day wear
Cons
- No built-in GPS
#3 Pick
XIAOMI Smart Band 9 Fitness Tracker, AMOLED Display- Bluetooth
£69.99
Pros
- Bright AMOLED display is easy to read outdoors
- Long battery life between charges
- Tracks a wide range of workouts and health metrics
Cons
- Companion app has fewer features than premium brands

#4 Pick
Garmin Forerunner 245 GPS Running Smartwatch with Training and Performance Features- Bluetooth, ANT+, GPS
£189.99
Pros
- Advanced running dynamics including VO2 max and training effect
- Built-in GPS with no phone required
- Up to 7 days battery life in smartwatch mode
Cons
- No touchscreen, relies on physical buttons
FAQ
My fitness tracker won’t turn on at all.+
First, ensure the device is sufficiently charged; try plugging it in for at least 30 minutes. Then, check that the battery contacts are clean and making good contact – a build-up of dirt or sweat can prevent power flow. If still unresponsive, try a hard reset (consult your tracker’s manual for the specific procedure), but if none of this works, consult the manufacturer's support.
My fitness tracker keeps disconnecting from my phone.+
Ensure Bluetooth is enabled on both your phone and the tracker. Check that there are no other devices interfering with the signal, such as microwaves or older Bluetooth devices. A quick reset of the tracker (usually a long press on a button) can sometimes resolve connection issues.
The steps counter isn’t accurate.+
Stride length and walking style vary greatly between individuals, so automatic step counting is rarely 100% precise. Try manually adjusting the stride length setting within the tracker's app to better match your gait, and be aware of any unusual movements that might skew the count.
My smart scale is giving me inconsistent weight readings.+
Ensure the scale is placed on a hard, level surface – carpet or uneven flooring can cause inaccuracies. Also, make sure you're standing still with your feet firmly planted and not shifting your weight during the weighing process.
My fitness tracker is making a strange buzzing noise.+
A buzzing sound could be caused by interference from nearby electronics or a loose component within the device. Try moving the tracker to a different location away from other devices, and ensure it's not resting on anything that might vibrate.
My fitness tracker won’t charge.+
Check the charging cable and adapter for damage – a faulty cable is a common cause. Also, ensure the charging contacts on both the tracker and the charger are clean; try wiping them with a dry cloth before attempting to charge again.
The battery drains very quickly.+
High screen brightness, frequent notifications, and using advanced features like continuous heart rate monitoring can all contribute to faster battery drain. Try reducing the screen timeout duration and disabling unnecessary notifications within the tracker’s settings.
I've noticed a small amount of water leaking from my fitness tracker.+
Water damage is a common issue, particularly if the tracker has been exposed to significant splashing or submersion. Immediately stop using the device and avoid further exposure to water; contact the manufacturer for assistance as this could indicate a more serious internal problem.
The display on my fitness tracker is dim.+
Adjusting the brightness setting within the tracker’s app is often the solution. Also, check that the device isn't placed in direct sunlight or near a bright light source, which can overload the screen and reduce its visibility.
My fitness tracker froze and won’t respond to touch.+
Try a soft reset – typically holding down the power button for 10-15 seconds. If this doesn't work, consult your tracker's manual for instructions on performing a factory reset (note that this will erase all data), but if you are unable to resolve it, contact the manufacturer’s support team.
In depth
The device simply won’t power on
One of the most frequent initial issues users report is complete failure to get their fitness tracker or smart scale operational at all. Often, this presents as a total lack of response when pressing a button or attempting to turn it on, despite visible battery indicators suggesting charge. The first step is always a straightforward check for power – ensure the device isn’t in sleep mode, which some models automatically enter after extended inactivity. Try holding down the power button for an extra 10-15 seconds; this can sometimes force a deeper reset.
Next, verify the charging connection. Examine the charging cable and connector for any visible damage or debris that might be interfering with the contact. Use a different USB port on your computer or wall adapter to rule out issues with the original power source. Even if the device appears to be charging (indicated by an LED), try a different charging cable altogether – cables can degrade internally without obvious external damage. If you’re using a wireless charger, ensure it's functioning correctly and that the device is placed directly on its surface, avoiding any obstructions.
If the problem persists after these basic checks, consider if the battery itself might be depleted, even with an apparent charge reading. Some devices have multiple battery cells, and one could be failing independently. If your scale has a removable battery, check to see that it’s properly seated and making good contact within its compartment. Again, do not attempt to remove or replace batteries yourself; this can damage the device and potentially cause a safety hazard if you are dealing with lithium-ion cells.
It’s crucial to remember that these devices often rely on Bluetooth connectivity for syncing data. A weak or intermittent Bluetooth signal can prevent them from powering on correctly. Ensure your smartphone is powered on, Bluetooth is enabled, and that it's not connected to too many other devices simultaneously. Try moving closer to your phone during the initial setup process – this improves the chances of a successful connection. If you’ve recently updated your smartphone’s operating system, ensure compatibility with your fitness tracker; older firmware versions may cause issues.
If none of these surface-level checks resolve the issue, or if there's any sign of physical damage to the device itself (cracks, dents, exposed wiring – though again, do not attempt to inspect this yourself), it’s essential to cease further investigation and contact the manufacturer’s customer support team. Electrical components can be complex, and attempting to diagnose issues beyond a basic power check could pose a risk of electric shock or damage the device beyond repair.
The device is consistently underperforming
Many users find that their fitness tracker or smart scale delivers inaccurate data, such as incorrect step counts, weight readings that fluctuate wildly, or inaccurate heart rate measurements. This can be incredibly frustrating and undermine confidence in the device's functionality. Start by ensuring the device has been properly calibrated – most models have a built-in calibration function accessible through their accompanying smartphone app. Follow the instructions carefully to complete this process accurately, as even small errors during calibration can significantly affect subsequent readings.
Check your personal fit and placement for accurate measurements. For fitness trackers, ensure it’s snugly fitted to your wrist but not restricting circulation. For smart scales, stand on the scale with your feet close together and evenly distributed; avoid wearing shoes or socks, which can introduce inaccuracies. It's also vital that you are standing still during readings – movement can drastically affect weight measurements, particularly with less sophisticated scales.
Examine the device’s sensors for any obstructions. Dust, dirt, or hair accumulating on the sensor surfaces can interfere with accurate readings. Gently clean the sensor area using a soft, dry cloth. Avoid using harsh chemicals or abrasive cleaners, which could damage the sensitive components. Also, check that the sensor surface is level – an uneven floor can skew readings.
Bluetooth connectivity can also play a role in performance issues. Ensure your smartphone's Bluetooth connection to the tracker remains stable throughout data syncing. If you experience frequent disconnections, try restarting both devices and re-establishing the connection. Furthermore, some apps have settings that affect data accuracy; review these settings within the app and ensure they are configured correctly for your specific needs.
If the problem persists after thorough cleaning, calibration, and Bluetooth checks, it’s likely a sensor malfunction or internal component issue. Continuing to rely on inaccurate data could lead to misinterpretations of your health metrics. It is highly advisable to stop using the device and contact the manufacturer's technical support for further assistance, particularly if you suspect a hardware problem.
Unusual noises emanating from the device
Occasionally, fitness trackers or smart scales may emit unusual noises – clicking, whirring, grinding, or buzzing – which can be disconcerting and indicative of an underlying problem. These sounds often arise due to mechanical components within the device that are experiencing wear and tear or encountering obstructions. The first step is to carefully inspect the device for any visible debris lodged in its moving parts, such as small stones or dust particles. Gently blowing around the device's exterior may dislodge these foreign objects.
If the noise persists after cleaning, it could be related to the battery compartment. Ensure the battery door closes securely and that the battery itself isn’t vibrating against the housing. Loose batteries can create rattling noises. If your scale has a load cell – the component responsible for measuring weight – this can sometimes generate a faint clicking sound as it adjusts its readings; however, excessive or unusual clicking warrants investigation.
Check for loose connections within the device's internal components. While you shouldn’t attempt to disassemble the device, observing from a distance and listening carefully may reveal if there is movement or vibration indicating a loose connection. This often points to a worn-out component needing replacement, but again, any attempts at repair should be left to qualified professionals.
Persistent noises can also indicate a problem with the scale’s leveling system, if present. Some scales use small wheels or rollers to adjust for uneven floors; these may become misaligned and cause noise. However, attempting to manually adjust these components is not recommended as it could damage the device.
If the unusual noises continue after performing these checks, or if you suspect a serious mechanical issue, discontinue using the device immediately. Contacting the manufacturer’s support team is essential to determine the root cause and prevent potential further damage or injury – especially with components that might vibrate excessively.
The device is leaking fluid
A concerning but relatively rare problem is the leakage of liquid from fitness trackers or smart scales. This can be caused by several factors, including battery issues, component failures, or condensation within the device. Immediately cease using the device if you notice any signs of leakage and move it to a safe, dry location away from sensitive electronics or surfaces.
First, check the battery compartment for swelling or damage – this is often a precursor to a battery failure that can cause fluid leaks. If the battery appears compromised, discontinue use immediately. Examine the device’s exterior casing for any cracks or openings through which liquid might be escaping. Even small gaps can allow moisture to enter and cause problems.
If you suspect condensation within the device (often due to extreme temperature changes), allow the device to acclimatize slowly to its normal operating environment. Do not expose it to rapid temperature fluctuations, as this could exacerbate the problem. If the leakage persists after allowing the device to stabilize, it’s likely a significant internal component failure.
Never attempt to open or repair the device yourself, as working with batteries and electronic components carries inherent risks of electric shock or chemical exposure. Contacting the manufacturer's technical support is crucial for guidance on how to handle this situation safely and effectively – they may advise you to return the device for assessment or provide instructions for a safe disposal.
The device will not charge
Many users experience difficulties getting their fitness tracker or smart scale to charge, often manifesting as the charging indicator light failing to illuminate or the device not appearing to gain any battery power. Start by ensuring that the charging cable and connector are fully inserted into both the device and the charging port. Sometimes, a slight misalignment can prevent proper contact. Gently wiggle the cable while observing the charging indicator – this can help identify if the connection is loose.
Check your USB power source for functionality. Try using a different USB port on your computer or wall adapter to rule out issues with the original power supply. Ensure the adapter is providing sufficient amperage; some devices require higher current than standard USB ports can deliver. If you’re using a USB hub, try connecting the device directly to your computer instead – hubs can sometimes impede charging performance.
Examine the charging contacts on both the device and the charger for any dirt or debris that might be interfering with the connection. Gently clean these contacts with a dry, lint-free cloth. Ensure the charging contacts are clean and free of obstructions before attempting to charge the device again.
If you’re using a wireless charger, ensure the device is placed directly on its surface without any obstructions. Some wireless chargers have limited charging areas, and misalignment can prevent proper charging. Try rotating the device slightly while it’s charging to find the optimal position.
The scale reading fluctuates wildly
Smart scales frequently struggle with inconsistent readings, which can be frustrating for users tracking their weight. Often this stems from environmental factors or sensor inaccuracies. Ensure you're standing on a completely level surface before stepping onto the scale; even slight slopes can throw off measurements. Avoid wearing shoes or socks, as they can add to the weight reading.
Consider ambient temperature – extreme temperatures can affect the accuracy of some scales. Allow the scale to acclimatize to room temperature before taking a measurement. Also, avoid placing the scale near heat sources (radiators, direct sunlight) which can cause inaccurate readings.
Bluetooth connectivity issues can also lead to fluctuating readings. Ensure your smartphone’s Bluetooth connection remains stable throughout data syncing. If you experience frequent disconnections, try restarting both devices and re-establishing the connection.
The device displays incorrect time/date
Incorrect time or date display is another common problem with fitness trackers and smart scales. This often indicates a software synchronization issue. Access the device's settings menu and look for an option to “Sync Time & Date”. Follow the on-screen instructions to synchronize the device with your smartphone’s clock or, if available, with a network time server.
The app isn't syncing data
If you are experiencing issues with the companion smartphone app failing to sync data from your fitness tracker or smart scale, begin by ensuring that Bluetooth is enabled on both devices and that they are within close proximity. A weak Bluetooth signal can prevent successful data transfer. Restarting both the device and your smartphone can often resolve connectivity problems. Check for software updates for both the device and the app – updating to the latest versions ensures compatibility and bug fixes.
Contacting Support
If you've diligently followed all of these surface-level troubleshooting steps and are still experiencing issues with your fitness tracker or smart scale, it’s time to contact the manufacturer’s customer support team. They have access to more detailed diagnostic tools and may be able to identify a specific hardware or software problem that isn’t readily apparent. Remember, electrical and mechanical components can be complex, and attempting to repair them yourself could pose a safety risk or void any potential warranty – always prioritize your well-being and seek professional assistance when needed.