Oral-B 3764 - User Manual

Questions and Answers

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Paul BarkerAug 10, 2025
Why is my Oral-B 3764 handle not charging?
- R
  Robert WalshAug 10, 2025
  Your Oral-B Electric Toothbrush handle might not be charging because the battery is at a very low level, and it may take 10-15 minutes until the display turns on. Also, the ambient temperature might be out of the valid range (less than 0°C or greater than 40°C), or the charger may not be properly connected. To resolve this, charge the handle for at least 30 minutes. It is recommended that the ambient temperature for charging is 5°C to 35°C. Also, ensure the charger is connected to the mains voltage.
C
Colleen OdonnellAug 19, 2025
Why does my Oral-B 3764 make rattling/loud noise during brushing or turning on?
- W
  wsparksAug 19, 2025
  The rattling or loud noise during brushing or turning on your Oral-B Electric Toothbrush may be due to the brush head not being placed correctly onto the brush handle, or the brush head may be worn. Check that the brush head fits properly on the handle, noting that a small gap remains in between. If the brush head is worn, replace it.
T
tiffanymaxwellAug 30, 2025
What to do if my Oral-B 3764 Electric Toothbrush handle is not operating during first use?
- M
  Michael WalkerAug 30, 2025
  If your Oral-B Electric Toothbrush handle is not operating during the first use, it could be due to a very low battery charge or operating outside the standard temperature range. If the battery has a very low charge, charge it for at least 30 minutes. Always operate the toothbrush in standard operating temperatures (greater than 0°C and less than 40°C).

Summary

Oral-B iO Toothbrush Features

Brush Head

Component for cleaning teeth.

Smart Pressure Sensor (Light Ring)

Visual indicator for brushing pressure.

Interactive Display

On-handle screen showing status and modes.

Daily Clean Mode

Standard mode for everyday dental hygiene.

Bluetooth Settings Management

Configure and control Bluetooth connectivity.

Connect to Oral-B App via Bluetooth

Instructions for connecting the toothbrush to a smartphone app.

Oral-B iO Operation and Usage

First Use Setup

Initial setup and operation guidance.

Charging and Operating Instructions

Instructions for charging and using the device.

Brushing Timer Functionality

Guidance on using the brushing timer feature.

Smart Pressure Sensor Functionality

Explanation of the pressure sensor's functionality.

Brushing Modes Overview

Overview of different cleaning modes available.

Oral-B iO Maintenance and Support

Connect to Smartphone via Bluetooth

Steps to pair the toothbrush with a mobile device.

Cleaning Recommendations

Instructions for maintaining the toothbrush.

Product Accessories

List and description of included accessories.

Product Guarantee and Warranty

Details on the product warranty terms.

Trouble Shooting Guide

Solutions for common problems and issues.

Oral-B 3764 Specifications

General

Model	3764
Battery Life	Up to 10 days
Power Source	Rechargeable Battery
Type	Electric Toothbrush
Pressure Sensor	Yes
Timer	2-minute timer with 30-second intervals
Cleaning Modes	Daily Clean, Sensitive, Whitening
Warranty	2 years