Arlo Doorbell Tamper Detection: Troubleshooting and Security Guide

Arlo’s wired Video Doorbell includes tamper detection: if someone tries to remove it, it can send an alert and trigger its siren. When tamper alerts show up with no one at your door, the cause is most often inconsistent power, such as a weak or failing transformer, a loose wire, or a wiring problem, not an intruder. Start by checking the power at the doorbell, then the mounting and wiring, and contact Arlo Support if the alerts continue.

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Key Takeaways

• Arlo launched its first Video Doorbell in 2019 with tamper detection, where the siren can be triggered if someone tries to remove the doorbell.
• The wired doorbell has an internal battery, which lets it send a tamper notification and video even after being pulled off its mount, according to one owner.
• In Arlo’s community forums, Arlo-side responders and owners often link false tamper alerts to a failed, out-of-spec, or weak transformer.
• Real tamper alerts deserve attention, so check your live view and recorded clips before assuming a false alarm.
• Tamper behavior and settings differ by model. [Verify your exact model against Arlo’s support pages.]

What Is Tamper Detection on an Arlo Doorbell?

Tamper detection warns you when the doorbell is moved or removed from its mount. Press coverage of the original Arlo Video Doorbell describes a siren that sounds if someone tries to take it off the wall. Security.org’s review also notes the alarm goes off if anyone tries to move it. An owner on a Wyze forum describes the built-in battery as what allows the doorbell to send a tamper notification and video when someone pops it off its mount and disconnects the wires.

[Arlo sells several doorbell generations, including wired and wireless versions. Confirm which models support tamper alerts and how each one behaves before publishing model-specific claims.]

Why You May Be Getting False Tamper Alerts

1. Weak or failing power

This is the most common explanation in Arlo’s community threads. One reply says tamper alerts come from a lack of power from the transformer and suggests checking the voltage at the doorbell. Another says the alerts were likely due to insufficient or inconsistent power. One owner fixed repeated dropouts by installing a new 24-volt, 30VA transformer, after which the doorbell read about 25.4 volts and worked normally. [Verify Arlo’s current power requirements for your model before recommending a transformer rating.]

2. Loose or corroded wiring

A loose connection can briefly drop power, which can look like removal. [Add steps based on Arlo’s wiring guide.]

3. Interference with the existing chime circuit

One community post describes a suspected link between passing cars and a tamper alert, where a component in the chime circuit may have briefly closed the circuit. That’s one owner’s theory, not a confirmed cause. Another reply notes that the switch on the power module has to be in the correct position. [Verify what “power module” refers to for your model in Arlo’s installation guide.]

4. Battery or charging problems

An owner reported tamper alerts with a low battery notification until the unit ran out of power. They said the transformer and chime had been replaced and the traditional doorbell still worked. That suggests the doorbell may not have been getting enough power to charge. Arlo Support was recommended as the next step.

5. Physical movement or a loose mount

Wind, vibration, a loose bracket, or an uneven surface may shift the doorbell enough to trigger the sensor. [Add Arlo’s mounting guidance.]

6. A genuine attempt to remove it

Don’t dismiss every alert. Open the live view and the recorded clip first.

How to Troubleshoot Arlo Doorbell Tamper Alerts

Safety first: Turn off power at the breaker before touching any doorbell wiring. If you’re not comfortable working with low-voltage wiring, hire an electrician.

1. Check the alert in the Arlo app. Review the clip and the time of the alert. Look for a person at the door.
2. Check the mount. Make sure the doorbell is seated firmly in its bracket and the wall surface is stable.
3. Check the power at the doorbell. With a multimeter, measure the voltage at the doorbell wires. Compare it to Arlo’s stated requirement. [Add Arlo’s required voltage range and VA for your model.]
4. Inspect the wiring. Look for loose, corroded, or damaged wires at the doorbell and at the chime.
5. Test the transformer. If voltage is low or unstable, a weak transformer is a likely culprit. Replace it with one that meets Arlo’s specifications.
6. Check any chime or power kit. Make sure it’s installed as the instructions say, including any switch settings.
7. Keep the unit powered. Several owners report tamper alerts when the doorbell loses power for a stretch.
8. Update the app and firmware. [Add steps from Arlo’s support guide.]
9. Contact Arlo Support. Community responders recommend this if alerts continue. A replacement can be started through the app’s support settings in some cases.

When Is the Doorbell Itself the Problem?

If a new transformer and good wiring don’t fix repeated alerts or dropouts, the device may be faulty. One owner reported the unit working for about 15 minutes, then going offline with no lights, and two doorbells failing in the same way at a house. In another thread, a user who couldn’t stop false tamper alerts switched to Arlo’s wireless doorbell and says it solved the problems with their mechanical chime. [These are individual reports. Don’t present them as typical.]

Security Tips for Your Arlo Doorbell

These are general security practices. Verify the exact menu paths and feature names in Arlo’s app.

• Turn on two-step verification for your Arlo account, if available. [Verify.]
• Use a strong, unique password.
• Keep the app and firmware updated.
• Review who has access to your account and shared devices.
• Mount it securely, with the correct bracket and hardware, so it can’t be knocked loose easily.
• Consider a subscription. Arlo Secure adds features such as person, package, and vehicle alerts, and cloud storage. Security.org notes you pay monthly for person detection after the trial. [Verify current Arlo Secure plans and pricing.]
• Keep your Wi-Fi secure with a strong router password.
• Check your notification settings so tamper alerts reach your phone. [Add the in-app path from Arlo’s support documentation.]

What to Do If You See a Real Tamper Event

1. Check the live view and the recorded clip.
2. If someone is at your door and you feel unsafe, call local emergency services.
3. Save the clip for evidence. [Add Arlo’s steps for downloading or sharing clips.]
4. Re-mount the doorbell and check it still works.
5. Consider a second camera angle.

Frequently Asked Questions

Does the Arlo Video Doorbell have tamper detection?

Yes. Arlo’s first Video Doorbell launched with tamper detection, and a siren can be triggered if someone tries to remove it.

Why am I getting tamper alerts when nobody is there?

Often it’s a power issue. Arlo community responders point to a weak, failed, or out-of-spec transformer or inconsistent power.

Can a bad transformer cause tamper alerts?

Several community responders say yes, and one owner resolved dropouts by replacing the transformer.

Can I turn off tamper alerts?

[I couldn’t verify whether Arlo lets you disable tamper alerts. One owner asked for an “ignore this alert” option. Check the app’s settings and Arlo’s support pages.]

Does the Arlo doorbell have a battery?

The wired doorbell has an internal battery, which one owner says allows tamper notifications after removal. [Verify against Arlo’s specifications.]

When should I contact Arlo Support?

If alerts continue after you’ve checked the mount, wiring, and power, or if the doorbell goes offline repeatedly.

Final Verdict

Arlo’s tamper detection is a useful security layer, but frequent false alerts usually point to power or wiring, not intruders. Check the clip, check the voltage, and replace a weak transformer before blaming the doorbell. If problems persist, Arlo Support is the next step.