Guide
Dyson V15 power modes explained
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In short
The Dyson V15 Detect has three power modes. Eco gives the longest runtime for hard floors and light cleaning, Auto adjusts suction to the floor and the amount of dust detected (shown as Med with heads that do not support Auto), and Boost gives full suction for short bursts on stubborn dirt. Use Eco or Auto for most cleaning and Boost sparingly.
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The V15 Detect gives you three power modes, switched with a button above the screen. Choosing the right one makes a big difference to both cleaning results and runtime. Dyson quotes up to 60 minutes in Eco with a non-motorised tool, but Boost uses the battery many times faster. This guide explains what each mode does, how Auto uses the head and the particle sensor to change power, how the modes affect runtime and which mode to pick for each floor and job. Exact behaviour can vary by edition and firmware, so check your manual.
The three modes at a glance
The table below summarises the modes. Runtimes depend on the head, tool and floor, so treat the descriptions as a guide.
Black line: about 35 minutes for a typical three bedroom house clean.
| Mode | What it does | Runtime |
|---|---|---|
| Eco | Lowest suction, steady power | Longest, up to 60 min with a non-motorised tool |
| Auto (or Med) | Adjusts suction to floor and dust levels | Varies with floor and dirt |
| Boost | Maximum suction | Shortest, a few minutes |
Eco mode
Eco keeps suction low and steady. It is ideal for hard floors, where little suction is needed, and for quick daily tidies. It also gives the longest runtime, so it suits larger homes where you want to clean everything on one charge.
Eco is also kinder on the battery over the long term, because it draws less current. Dyson describes eco as the balance between power and runtime that preserves battery life. Use it as your default unless the floor needs more.
Auto mode and Med
Auto is the V15's clever mode. With the High Torque or Digital Motorbar head fitted, the head measures resistance on the brush bar many times a second to sense the floor type, raising suction on carpet and lowering it on hard floors. The piezo sensor also counts dust particles, and the machine raises suction when it detects more dirt.
When a head that cannot sense the floor is fitted, such as the laser Fluffy Optic head or a tool, the middle mode shows as Med instead, a fixed medium setting. Our Detect features explainer explains the sensors in more detail.
Boost mode
Boost runs the motor at full power for maximum suction. It is meant for short bursts: a ground-in patch of carpet, a deep rug or a doormat. Used for long, it drains the battery in minutes and can make the machine warm.
Switch to Boost for the spot that needs it, then switch back. If you find yourself using Boost all the time, check the filter, bin and wand for blockages, as lost suction is often a maintenance issue. Our lost suction article covers the checks.
How modes affect runtime
The screen shows remaining minutes for the current mode, which updates as you switch. In Eco you may see close to an hour with a tool; in Boost, just a few minutes. Auto sits in between and changes as the machine adjusts.
If you clean a large home, plan to use Eco on hard floors and Auto on carpets. Our runtime planner estimates whether one charge covers your home, and our runtime explainer explains why quoted runtimes differ from real use.
Which mode for each job
Use this as a starting point and adjust to your home. Your own home and floors will decide which mode you use most.
| Job | Suggested mode |
|---|---|
| Hard floors, daily | Eco |
| Mixed carpet and hard floor | Auto |
| Deep rug or doormat | Boost briefly |
| Stairs in handheld mode | Eco or Med |
| Sofa and upholstery | Eco or Med |
Gen5 and other Dyson models
Dyson uses similar modes on other models. The V11 has Eco, Auto or Med and Boost; the V8 has Eco and MAX only. The Gen5 Detect uses a similar approach to the V15 with its own power settings. Check your manual if you own a different model.
Our Dyson cordless comparison lists the modes on each current model.
Frequently asked questions
What is Auto mode on the Dyson V15? A mode that adjusts suction to the floor type and the dust the sensor detects, using a compatible head.
Why does my V15 show Med instead of Auto? Auto needs a head that senses the floor. With other heads or tools, the middle mode becomes Med.
Which V15 mode gives the longest runtime? Eco, up to 60 minutes with a non-motorised tool.
Does Boost damage the V15? No, but it drains the battery quickly and should be used in short bursts.
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