Q: What does the solid blue light mean while charging the HOOVER HGO 300 HYDRO PRO robot?

The solid blue light (constant, without blinking) on the LED indicator of your HOOVER HGO 300 HYDRO PRO means that the battery is fully charged and ready to use. Here are the different states of the LED indicator to properly interpret the charging status: Solid blue light : Battery fully charged ✓ Blinking blue light : Charging in progress No light : Robot is off or in standby mode Solid red light : Error state (please consult support if this light persists) You can use your robot as soon as the blue light becomes solid. The first full charge takes about 8 hours, and subsequent charges take 4 to 5 hours.

Question 1

Why doesn't the HOOVER HGO 300 HYDRO PRO robot wash?

Accepted Answer

If your HOOVER HGO 300 HYDRO PRO robot is not washing properly, here are the points to check in order:

1. Water tank properly inserted

The tank must be aligned and pushed until you hear a click. Make sure it is securely locked in place. Important: water starts to flow as soon as the tank is inserted, so the robot must start immediately to prevent water from stagnating.

2. Tank filled with clean water

Open the rubber cap of the tank and check that it contains water. You can add detergent according to the manufacturer's recommendations.

3. Damp and properly positioned cloth

Before installation, the cleaning cloth must be wet with running water and slightly wrung out to ensure even distribution of water on the floor. A dry cloth will not wash.

4. Cleaning function activated immediately

After inserting the tank, activate the cleaning function without delay. If you wait too long, the tank will have leaked uselessly.

5. After cleaning

Remove the tank and cloth once the cycle is complete. Empty the residual water from the tank by opening the cap. Wash the cloth with mild detergent, rinse it, and let it dry completely before the next use.

If after these checks the function still does not work, the problem may be due to a blockage in the drainage system or a mechanical malfunction requiring intervention from the manufacturer.

Question 2

The HOOVER HG510D robot is flashing during charging, what should I do?

Accepted Answer

If your HOOVER HG510D robot is flashing white and blue during charging after 12 hours, it indicates a problem detected by the system according to the official manual.

First, check that the charging is not simply in progress: During a normal first charge, the Power/Stop and Home buttons flash white for 4 to 6 hours. A full charge during normal use takes about 4 to 5 hours. If the flashing persists after this time, it is a sign of an anomaly.

Diagnostic actions:

Check the brushes: Clean and ensure that the agitator brush is properly installed. A poorly mounted brush triggers this error (white + blue).
Check the drive wheels: Make sure none are blocked or damaged.
Clean the contacts: Clean the robot's charging contacts and the charging base (contacts often get dirty).
Clean the sensors: Check the condition of the anti-fall sensors and the bumper, which can affect operation.

If after these checks the white and blue flashing persists, it indicates a major fault: defective battery or damaged charging circuit. The battery is covered by a 6-month warranty. Contact Hoover customer service with your purchase invoice to claim the warranty.

Question 3

What does the solid blue light mean while charging the HOOVER HGO 300 HYDRO PRO robot?

Accepted Answer

The solid blue light (constant, without blinking) on the LED indicator of your HOOVER HGO 300 HYDRO PRO means that the battery is fully charged and ready to use.

Here are the different states of the LED indicator to properly interpret the charging status:

Solid blue light: Battery fully charged ✓
Blinking blue light: Charging in progress
No light: Robot is off or in standby mode
Solid red light: Error state (please consult support if this light persists)

You can use your robot as soon as the blue light becomes solid. The first full charge takes about 8 hours, and subsequent charges take 4 to 5 hours.

Question 4

How to change the language of the HOOVER HGO 300 HYDRO PRO robot?

Accepted Answer

The manual provided with the HOOVER HGO 300 HYDRO PRO robot does not contain specific instructions for changing the language of the device itself. However, the robot offers advanced control via the mobile app.

To set the language:

Download the Hoover H-GO 300 app on your smartphone (available on iOS and Android)
Connect your robot to the app via Bluetooth or Wi-Fi according to the pairing instructions
Access the app settings, where you should find the language options

If the robot's language does not change via the app, contact Hoover customer service at www.candy-group.com or your retailer, as language settings may only be configurable at the device level after an update or reset.

Question 5

How to avoid or disable the sleep mode of the HG550DP 011?

Accepted Answer

The sleep mode activates automatically after 3 minutes of inactivity on the HG550DP 011. This function is intentional to save energy. When the robot enters sleep mode, the indicator light blinks blue (instead of staying continuously on).

It is not possible to completely disable the sleep mode, but you have several solutions to keep your robot active:

Via the HG5 app: regularly schedule cleaning sessions or movements to avoid long periods of inactivity
Wake manually: press the Power button when you see the light blinking blue
Keep the charging base active: the robot remains ready for action when the base is powered

This energy-saving design is standard on modern robotic vacuums and helps extend the life of the lithium-ion battery.

Question 6

How to fill the water tank of the HOOVER HGO 300 HYDRO PRO vacuum robot?

Accepted Answer

To fill the water tank of your HOOVER HGO 300 HYDRO PRO vacuum robot, follow the steps below:

Remove the cloth attached under the water tank.
Open the rubber cap of the tank.
Fill the tank with clean water. You can add a specific detergent if necessary, following the manufacturer's recommendations.
Close the cap tightly to prevent any leaks.
Replace the tank in the robot by aligning it correctly, then push it until you hear a click indicating that it is securely attached.

Important: Water starts to flow as soon as the tank is inserted. Immediately activate the cleaning function to prevent water from pooling on the floor and causing damage. Also, make sure to remove the tank when the robot is charging.

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