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Medium Thermostat Guard CG511A:

Fits the following Honeywell Thermostats below and other models measuring 6 1/16" W x 5 1/16" H x 2 5/8" D or smaller:

  • RTH8xxxx Family Thermostats
  • RTH7xxxx Family Thermostats
  • RTH6xxxx Family Thermostats
  • RTH5xxxx Family Thermostats
  • CT3x Family Thermostats
Manuals

Medium Thermostat Guard

The Honeywell CG512A1009 Medium 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 Medium Sized (6 1/16" W x 5 1/16" H x 2 5/8" D or smaller) Honeywell 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.

  • Clear plastic cover that resists yellowing.
  • Key lock with inner shelf to prevent tampering.
  • Protects unwanted changes to AC/Heating preferred settings.
Product Details
Product Specs
UPC:
085267990028
MPN:
CG511A1000/C
Category:
Thermostats
Product Manuals
Honeywell Home Medium Thermostat Guard - CG511A Video

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10 Customer Reviews

4.8 Overall rating
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Honeywell Home Medium Thermostat Guard - CG511A Reviews
Rick Logan
June 12, 2019
Verified Purchase
Honeywell thermostat gaurd

Good product, I would purchase these again.

Nicholas LaHam
March 14, 2019
Verified Purchase
Good but needs a hinge, and a back plate

Does what it is supposed to, and works fine. The front cover can come completely off, so when unlocking the cover, it can easily fall on the ground getting scratched since there is no hinge to hold it up. A hinge would be better and make this easier to use. Also this really needs a back plate so you can mount it on top of an electrical box between the box and the thermostat. We cut a piece of flat plastic and made our own, and then just drilled holes.

Andre
July 21, 2017
Verified Purchase
Awesome Guard!

This thing is really worthy, easy to set up and it indeed prevents tampering!

Larry Lewis
September 29, 2016
Verified Purchase
guard

Fit perfectly

Gary S. Lemoine
February 2, 2016
Verified Purchase

Product met our requirements for application intended. Sales personnel were very helpful in answering questions and shipping product in a timely fashion.

Joan MCDonald
January 26, 2016
Verified Purchase

They were helpful...answered all of my questions. We received exactly what we expected, and in a timely manner.

Christine Donofrio
October 21, 2015
Verified Purchase

Worked out perfectly! Thank you!

Diana Peterson
June 19, 2015
Verified Purchase
Good title

Very easy to install, keeps the thermostat locked up but didn't require anything extra to install it.

Frank Moran II
November 3, 2014
Verified Purchase
Great Cover!

The lockboxes are generally very sturdy and prevent most people from tampering with the controls below.

Phil Garcia
November 30, 2011
THANKS.

Keeps me in control of the thermostat in the shop. Thanks!

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