iFixit - Answers With Device "Electric Toothbrush"

electric toothbrush: rechargable toothbrush battery dying fast can it be replaced?

Thu, 08 Nov 2018 11:46:03 -0700

The brush is functioning quite well except the battery is failing. Seems quite wrong to throw it away just for that. Is there any way of breaking into the case and replacing it with a new one? It came from Tchibo so I don't know the make.

⟐ Commented November 08, 2018 at 11:46 MST

Philips Sonicare FlexCare: Why is the toothbrush making so much noise?

Wed, 17 Jan 2024 21:57:22 -0700

The toothbrush is making much more noise than it did when it was new.

⟐ Commented January 17, 2024 at 21:57 MST

Philips Sonicare FlexCare: Beeping, one long, two short

Wed, 20 Aug 2025 08:51:59 -0700

My trusty Sonicare has started beeping in a repeating pattern while charging. It still works, but only occasionally. Is this fixable or do I need to buy a new one? It is by far the best toothbrush I have ever had, so I don't want to just discard it without attempting a fix or knowing I need a new one.

⟐ Commented August 20, 2025 at 8:51 MST

Philips Sonicare DiamondClean HX9340: I Believe I Have Discovered a Defect In Design

Fri, 20 Nov 2020 05:10:56 -0700

The upper spindle on which the brush snaps into place appears to be constructed partially of plastic. While the brush is vibrating it rubs against a metal portion, especially when the user is pressing the brush against his teeth. My toothbrush now does not operate. Once even the slightest pressure is applied to brushing my teeth the vibration ceases. If no pressure is applied, as in not touching my teeth with the brush, the toothbrush vibrates as it should. This is poor design for the obvious reason - one has to apply pressure and in doing so the plastic part deteriorates making the electric toothbrush useless. Is this a know defect? Can I get my expensive toothbrush replaced? have you made alterations in your latest version?

Thank you,

Brian Rodgers

⟐ Commented November 20, 2020 at 5:10 MST

Braun Oral-B Triumph 9900: Is my 3757 Oral B toothbrush repairable? On button doesn't work

Fri, 19 Dec 2025 13:26:43 -0700

Yesterday my 3757 Oral B toothbrush worked fine; it was fully charged. This morning it worked briefly, then turned off, and finally the on button doesn’t work at all. I don’t know the age of this product—is it repairable?

⟐ Commented December 19, 2025 at 13:26 MST

OralB iO: The grey drive cylinder came out of the toothbrush — is it repairable?

Wed, 03 Sep 2025 07:13:55 -0700

The grey drive cylinder came out of the toothbrush — is it repairable?

⟐ Commented September 03, 2025 at 7:13 MST

Philips Sonicare DiamondClean HX9340: Tip loose and broken off(?) possible to fix?

Sun, 08 Mar 2026 12:10:50 -0700

Hello,

I woke up this morning and was going to brush my teeth but as I was brushing the brush head came off and I saw that the small metal tip that you attach the brush too had come loose, see attached pictures.´

http://i.imgur.com/JHrre5O.jpg http://i.imgur.com/i1H7kgN.jpg

Any way to fix this?

⟐ Commented March 08, 2026 at 12:10 MST

Philips Sonicare FlexCare: Why won't my toothbrush turn on?

Thu, 08 Jan 2026 02:46:55 -0700

I have tried charging my brush, but no matter what the toothbrush will not turn on. The charger works fine on my other brush that came with the set.

⟐ Commented January 08, 2026 at 2:46 MST

Philips Sonicare DiamondClean: What is U2 ic?

Mon, 09 Jan 2023 18:18:22 -0700

The fuse F1 on my brush gets blown when I turn it on. When replaced, I can charge the brush, all LED come on and U2 IC gets super hot. I assume this one drains a lot off current, tripping the fuse. I can’t find any information on what the IC is. On my toothbrush that IC has IU2FJ on it, another has IU2GG on it. I was looking for a 6 pin TSOP IU2 IC, but can’t find anything. I assume is some kind of power management IC.

⟐ Commented January 09, 2023 at 18:18 MST

Oral-B Black 7000: Runs down and stops in about a second

Tue, 11 Nov 2025 14:41:06 -0700

My toothbrush runs down and stops in about a second. I fixed the problem a few months ago by unsoldering and then resoldering the battery. I have checked the battery voltage during the switch on, slow down and stop phase and it remains constant at about 3.7V so there would seem not to be a problem with the battery. When the problem occurred before I found that bypassing the MOSFET caused the motor to run normally at full speed, so this seems to be a microprocessor issue. I have tried resetting the brush by holding the power button for ten seconds. There is no water inside.

⟐ Commented November 11, 2025 at 14:41 MST

Oral-B White Pro 1000: Does anyone have details regarding dismantling & replacing batteries.

Sat, 04 Feb 2023 16:12:08 -0700

We have two of the Oral B electric toothbrushes both of which need replacement rechargeable batteries. As the devices are obviously waterproof is there any way to dismantle them?

⟐ Answered February 04, 2023 at 16:12 MST

Electric Toothbrush: Oral B Triumph Electric Tooth Brush Battery Replacement

Thu, 17 May 2018 07:08:38 -0700

I would like to replace the battery on my electric tooth brush - Oral B Triumph. I am told that the battery is soldered to the circuit board.

-Siva

⟐ Answer accepted May 17, 2018 at 7:08 MST

Oral-B Black 7000: Is the Pressure Sensor Broken?

Fri, 26 Jan 2024 22:50:28 -0700

The pressure sensor on my toothbrush seems to be broken, it gives constant red light even though the head isn't pressed to anything. Oral-B have asked me to clean the metal pin with warm water to clean up toothpaste build and drain the battery and recharge it again for 24 hours to fix. It doesn't work. Any fixes?

⟐ Commented January 26, 2024 at 22:50 MST

Electric Toothbrush: Oral-B Braun Toothbrush Motor Not Working

Fri, 20 Feb 2026 08:28:43 -0700

I have the following toothbrush: Oral-B Braun Genius X Type 3771

The toothbrush can be fully charged, battery lights are working normally. It can be switched on, all indicator lights are working, pressure sensor light is working fine, timer light is also working.

The problem only is that it just won’t spin/vibrate. I’ve replaced to a new toothbrush head, but still doesn’t work. No humming/sound from the body at all.

I am willing to attempt to repair it by myself. My questions are:

I’m suspecting motor problem inside, is this correct?
Is it repairable?
Is there a guide?

Thanks for your time. Hope you’d help me out.

⟐ Commented February 20, 2026 at 8:28 MST

OralB iO: Why it doesn't charge properly?

Fri, 11 Apr 2025 16:51:52 -0700

It seems to be charged. It syncs, and it shows on the app to be fully charged. Then it stops working and back to 0

⟐ Commented April 11, 2025 at 16:51 MST

Oral-B White Pro 1000: Why does motor comes on but brush head does not move

Tue, 05 Oct 2021 01:17:19 -0700

Brush head does not when motor activates

⟐ Commented October 05, 2021 at 1:17 MST

phillips sonicare 4300 (HX680C): Battery Type and Swap Instructions

Sat, 22 Nov 2025 20:30:44 -0700

Which battery does this one use? On mine it says P/N 300005878501 and its colored green.

⟐ Commented November 22, 2025 at 20:30 MST

Oral-B iO Series 4 Type 3794: I dropped my toothbrush and it won't turn on anymore

Fri, 24 Oct 2025 12:23:14 -0700

Hi there, are there any tips on troubleshooting what the issue could be?

⟐ Answer edited October 24, 2025 at 12:23 MST

Philips Sonicare DiamondClean HX9340: Toothbrush turns on by itself

Thu, 16 Oct 2025 11:02:52 -0700

My sonicare diamondclean is turning on and running through settings by itself ?can it be fixed

⟐ Commented October 16, 2025 at 11:02 MST

OralB iO: Where can I source small repair parts? The neck gasket specifically

Wed, 21 Feb 2024 22:10:00 -0700

The seal below the metal ring on my io is split so water gets inside the body of the toothbrush. Can I buy a replacement for it? Or is there some other kind of repair I have to do instead involving silicone sealant or something?

⟐ Commented February 21, 2024 at 22:10 MST