The 8 Best Thermostat Locks

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Best High-End
Best Mid-Range
Best Inexpensive

This wiki has been updated 4 times since it was first published in May of 2019. If you’ve got kids who never saw a button they didn't want to push or employees who prefer a subzero environment, an unprotected thermostat can lead to sky-high utility bills. Rather than watching it like a hawk, consider one of these locks instead. They provide an easy way to stop unauthorized access to temperature controls, and come in a host of sizes and styles to suit every need. When users buy our independently chosen editorial choices, we may earn commissions to help fund the Wiki. Skip to the best thermostat lock on Amazon.

8. Venstar Slimline Cover

7. Braeburn 5970

6. Honeywell CG512A

5. Honeywell Medium

4. TayMac ZTC300

3. Bramec Corporation Sentinel

2. Elago Secure

1. StatGuardPlus Changeable

Editor's Notes

May 15, 2019:

While most thermostat guards are similar in design, we saw an opportunity to provide subtly different models to suit varied tastes and sizes. One thing each selection has in common, though, is that they are all outfitted with plenty of vents to allow airflow to reach your temperature controls. This ensures they won't interfere with how they work. We included options for residential and commercial use, so school administrators, hotel staff, office managers, and homeowners should all find something to suit their needs.

The StatGuardPlus Changeable made our number one pick for two main reasons outside of its durable construction. One, it doesn't require keys to be secured, which is a huge advantage over other models, as keys are easily lost, and limited in who can carry them. It also uses a hinged door, which seems inconsequential unless you frequently need to get to the thermostat to change it. Taking off an entire cover is not only annoying, but it increases the chance you might accidentally drop and damage it.

The Elago Secure is another quality option that we felt deserved a high ranking for its thoughtful design. Many people are turning to smart thermostats, with Nest being one of the most popular. It only made sense to ensure Nest owners had the means to cover their devices. Although Nest has a control lock feature, you may still want to give someone else control who doesn't have access to the app or your phone, or maybe you'd just like to keep wandering fingers from touching it.

Each of the Honeywell units on this list fit more than just Honeywell brand thermostats, making them even more versatile. They're treated to resist chemicals and UV light, which is great if they'll be exposed to either. This also makes cleaning them worry-free.

Finally, those who require something nigh-indestructible should look to the Bramec Corporation Sentinel. It should keep anyone looking to mess with your thermostat completely at bay, making it especially good for exposed and industrial areas.


Gia Vescovi-Chiordi
Last updated on May 17, 2019 by Gia Vescovi-Chiordi

Born in Arizona, Gia is a writer and autodidact who fled the heat of the desert for California, where she enjoys drinking beer, overanalyzing the minutiae of life, and channeling Rick Steves. After arriving in Los Angeles a decade ago, she quickly nabbed a copywriting job at a major clothing company and derived years of editing and proofreading experience from her tenure there, all while sharpening her skills further with myriad freelance projects. In her spare time, she teaches herself French and Italian, has earned an ESL teaching certificate, traveled extensively throughout Europe and the United States, and unashamedly devours television shows and books. The result of these pursuits is expertise in fashion, travel, beauty, literature, textbooks, and pop culture, in addition to whatever obsession consumes her next.


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