Honeywell Home CG512A1009 Large Thermostat Guard, Fits Thermostats 8. 25″ W x 5. 75″ H or Smaller, Hand Control

Price: $26.30 - $22.95
(as of Oct 26, 2026 19:41:35 UTC – Details)


The Honeywell Home CG512A1009 Large Thermostat Guard provides the ideal defense in preventing others from tampering with your heating and cooling options. An elevated peace of mind is established as users will no longer have to worry about any unauthorized access that may result with adjustments or damages. Installation is near effortless and the Guard will fit on all Large Sized (8. 25″ W x 5. 75″ H x 2. 75″ D or smaller) Honeywell Home thermostats and a host of others. The actual casing is chemical and UV resistant which allows users to deploy their cover all year round without the slightest concern. A steadily constructed key and lock function will perform admirably as a versatile defense.
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
Customers find the thermostat guard easy to install and appreciate its safety features, particularly how it keeps children away from the device. The product is sturdy, fits well, and offers good value for money, with one customer noting significant savings on their electric bill. The size receives mixed feedback – while some find it spacious enough for a DTA, others say it’s not as large as advertised. The locking mechanism and mounting security also get mixed reviews, with some finding it very secure while others report it’s not very secure.