The blades on my robot mower wear out unusually fast and tear the grass
Home Nura guide — category: Robot Lawn Mowers
Diagnosis
This symptom isn't trivial, but in most cases you can fix it without calling in a pro. Work through the steps below in order and stop as soon as the problem clears up.
What to do
1. Unplug it and let it cool. 2. Inspect the parts you can reach. 3. Follow the manufacturer's procedure (owner's manual or official website). 4. If the fix means taking the unit apart, stop and contact customer support so you don't put the warranty at risk.
Repair or replace?
If the problem is still there after these checks and the appliance is out of warranty, weigh the repair estimate against the cost of a new model.
If you're replacing it
Robot Lawn Mowers: the picks from our buying guide
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Best overall
ECOVACS GOAT A1600 RTK
RTK and LiDAR combined to stay accurate near trees, lawns up to 0.4 acre (1,600 m²), a 13 in (33 cm) cutting width and slopes up to 50%, according to ECOVACS.
Photo: © ECOVACS
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Best value
Segway Navimow i105E
Wire-free RTK plus a VisionFence camera for lawns up to 5,400 sq ft (500 m²), with a simple guided setup in the app.
Photo: © Segway-Ninebot
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Best for large, sloped yards
Mammotion LUBA 2 AWD 3000X
All-wheel drive, slopes rated up to 80%, a 16 in (40 cm) cutting width and RTK plus AI vision for yards up to 0.7 acre (3,000 m²).
Photo: © Mammotion
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Other common problems in this category
These issues affect the same type of appliance — each one comes with a diagnosis and the steps to take.
- Robot Lawn MowersMy robot mower crosses the boundary wire and wanders out of the yard
- Robot Lawn MowersThe blades on my robot mower keep jamming in tall grass
- Robot Lawn MowersThe charging station for my robot mower stopped charging it
- Robot Lawn MowersMy robot mower cuts unevenly and leaves taller strips of grass
Frequently asked questions
Check the manufacturer's warranty first: how long it lasts and what it covers vary by brand and model, so read the terms for yours and keep your proof of purchase. If you bought it new in the EU, a two-year legal guarantee also applies (Directive (EU) 2019/771), covering defects present at delivery, whenever they first show up.
If you're still within the seller's return window, a return or exchange is usually the fastest fix. After that, go through the manufacturer's support team: it handles warranty claims and can often repair the unit even after the warranty has run out. Either way, keep your proof of purchase.
Our public methodology lowers the Nura Score /10 of any model in our Robot Lawn Mowers guide whose recurring failures show up in owner reviews. A model that breaks down too often never makes it to the top, whatever the brand.
Generally, yes, if you stick to routine maintenance: cleaning, replacing a gasket, recalibrating. Irreversible changes to the hardware are what can cause problems, so read your warranty terms before you open anything up. Anything the manufacturer's manual walks you through is the safe zone.
Your proof of purchase, the exact model name and a record of the symptom: photos, a short video, the sound it makes and any error code. Note when the problem started and what you've already tried. With all that in hand, support can pin down the problem much faster.