we’ve put together a collection of the best Thermostat Locks that are currently available on the market. To help you find the perfect Thermostat Lock among a wide variety of options, we constantly update our collection with new and trending models.

10 Best Thermostat Locks

Based on dozens of customer reviews and ratings, the followings are the top 10 best-selling Thermostat Locks:

Top Rated Thermostat Lock Reviews

Since we’ve mentioned 10 different models of Thermostat Locks on the above list, it may be difficult for you to find the right one for your needs. This is why we listed the key features of each of these Thermostat Locks below:

1

Product Highlights:

  • Protect again tampering, damage and unauthorized adjustment of thermostat settings.
  • Fits Honeywell Home thermostat families RTH8xxxx, RTH7xxxx, RTH6xxxx, RTH5xxxx, CT3x and other models measuring 6 1/16 W x 5 1/16 H x 2 5/8 D inches or smaller.
  • Actual size of thermostat guard: 6. 5″ H x 7. 5″ W x 3″ D.
  • Key lock with inner shelf to prevent tampering.
  • Clear plastic casing is chemical and UV resistant that resists yellowing.
Sale2

Product Highlights:

  • Protect again tampering, damage and unauthorized adjustment of thermostat settings.
  • Key lock with inner shelf to prevent tampering.
  • Clear plastic casing is chemical and UV resistant that resists yellowing.
  • Fits Honeywell Home thermostats listed as well as other models measuring 8. 25″W x 5. 75″H x 2. 75″D or smaller
  • Fits Honeywell Home models: RTH8XXX, RTH7XXX, RTH6XXX, RTH5XXX, RTH4XXX, RTH3XXX, CT5X, CT3X
3

Product Highlights:

  • Clear plastic cover with built-in lock and a set of keys
  • For use with Honeywell Home thermostats. It protects against unwanted changes to AC/Heating preferred settings
  • Covers CT87, CT30,CT31,CT33 (Round) models without the wall plate
  • Outside dimensions: 5-7/8 W x 5-7/8 H x 2-1/2 D (inches)
  • Interior dimensions: 4-7/16 W x 4-7/16 H x 2-1/4 D (inches)
Sale4

Product Highlights:

  • CONVENIENT TO USE – Patented rotating removable hinge makes adjusting the thermostat more convenientby eliminating the need to completely remove the cover
  • EASY INSTALLATION – Lid can be removed for ease of thermostat installation; Can be mounted in any one of four directions
  • PATENTED HINGE – Includes high strength locking features to ensure that the lid cannot be removed when closed
  • INCLUSIONS – Includes tumbler lock with two keys, mounting screws and anchors
  • DIMENSIONS – 4 7/16 x 4 7/16 x 2 1/4 inches. Outer dimensions – 5 7/8 x 5 7/8 x 2 1/2 inches
5

Product Highlights:

  • Fits all Honeywell and most other thermostats
  • Clear plastic cover that resists yellowing; The Honeywell CG512A1009 Large Thermostat Guard provides the ideal defense in preventing others from tampering with your heating and cooling options.
  • Key lock with inner shelf to prevent tampering
  • Protects unwanted changes to AC/Heating preferred settings
  • Ultra clear acrylic resin cover and base resists the yellowing effects of chemicals and UV-light
6

Product Highlights:

  • DECREASE YOUR ENERGY BILL: The BISupply | Large Thermostat Guard is an AC lockbox for thermostat control; Constructed of heavy-duty transparent plastic allows you to clearly see your thermostat while preventing anyone from tampering with your heating or air conditioning settings and protecting against unwanted changes to preferred settings in commercial and residential areas such as an office, church, restaurant, school, or home
  • FITS YOUR THERMOSTAT: Fits over existing thermostats up to 7” x 2.1” x 4.2” inch (17.8 x 5.3cm x 10.7cm) – This is the inside dimensions of the AC lock box cover; 1.5” x 1.25” inch (3.8cm x 3.2cm) backside rectangular hole for thermostat wires to wall; Measure your thermostat length by depth by height to ensure correct fitment; Open hinge allows cover to come apart into 2 separate pieces when opened; 8.5” x 2.9” x 5.6” inch (21.6cm x 7.4cm x 14.2cm) outside dimensions (OD)
  • NO TEMPERATURE FLUCTUATION: AC control cover is ventilated on all 4 sides to avoid interference with detection of current temperature by your thermostat
  • EASY TO INSTALL: There are 2 separate parts – The back plate (opaque piece) mounts to the wall, your thermostat mounts on the back plate, and the cover locks on the back plate; To install without removing thermostat from wall, only install clear cover and not back plate; Mounting screws included to affix to any surface; Phillips screwdriver required for installation, not included
  • PACKAGE CONTENTS: Thermostat box cover package includes (1) locking cover for thermostat with base, (1) key, and (8) mounting screws for your convenience
Sale7

Product Highlights:

  • Brand New in box. The product ships with all relevant accessories
8

Product Highlights:

  • Lock and key
  • Clear Plastic
  • Maximum thermostat dimensions 3 1/4″ d x 3 1/2″ h x 6 3/8″ l
9

Product Highlights:

  • Fits over existing thermostat and other models measuring 8-1/4 in W x 2-3/4 in D x 5-3/4 in H or Smaller
  • Clear plastic cover that resists yellowing
  • Key lock with inner shelf to prevent tampering
  • Protects unwanted changes to AC/heating preferred settings
  • Inner shelf to prevent tampering. Packaging may vary
10

Product Highlights:

  • Fits thermostats no larger than 5.25W x 4.50H x 3.0D
  • Medium size – External Dimensions 6.5W x 5.875H x 3.25D
  • Limits unwanted access; Tamper resistant, strong durable plastic
  • One Key and mounting screws included
  • Larger Guard available See Model BB3001

Video Overview

Locking Thermostat

Honeywell Model# TH8320R1003.

Final Words

So, these are all of the Best Thermostat Locks available on the market. We hope this collection was helpful to find the right Thermostat Lock for the money. However, we recommend checking out the features, benefits, and problems of each of these Thermostat Locks before taking your decision.