---
product_id: 2336362
title: "Genuine Honeywell Home CG510A Thermostat Guard, Small, Fits Thermostats 4.375H x 4.375W inches or smaller"
brand: "honeywell home"
price: "R849"
currency: ZAR
in_stock: true
reviews_count: 13
category: "Honeywell Home"
url: https://www.desertcart.co.za/products/2336362-genuine-honeywell-home-cg510a-thermostat-guard-small-fits-thermostats-4
store_origin: ZA
region: South Africa
---

# Fits thermostats ≤4.375" x 4.375" Built-in lock with key Easy wall-mount installation Genuine Honeywell Home CG510A Thermostat Guard, Small, Fits Thermostats 4.375H x 4.375W inches or smaller

**Brand:** honeywell home
**Price:** R849
**Availability:** ✅ In Stock

## Summary

> 🔐 Lock in comfort, unlock productivity.

## Quick Answers

- **What is this?** Genuine Honeywell Home CG510A Thermostat Guard, Small, Fits Thermostats 4.375H x 4.375W inches or smaller by honeywell home
- **How much does it cost?** R849 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/products/2336362-genuine-honeywell-home-cg510a-thermostat-guard-small-fits-thermostats-4)

## Best For

- honeywell home enthusiasts

## Why This Product

- Trusted honeywell home brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Hassle-Free Installation:** Comes with all mounting hardware and installs quickly—no professional needed.
- • **Durable & Discreet Design:** Clear, sturdy plastic ensures protection without sacrificing style or visibility.
- • **Secure Your Climate Control:** Lockable clear cover prevents unauthorized thermostat changes, keeping your environment perfectly set.
- • **Peace of Mind in Shared Spaces:** Ideal for offices, churches, and public areas to maintain consistent temperature settings and avoid disruptions.
- • **Precision Fit for Honeywell & More:** Designed to snugly fit Honeywell Home thermostats and similar models up to 4.375" square for seamless integration.

## Overview

The Honeywell Home CG510A Thermostat Guard is a clear, lockable cover designed to protect thermostats up to 4.375" x 4.375" from unauthorized adjustments. Featuring a built-in lock with key and easy wall-mount installation, it fits popular Honeywell models and similar-sized thermostats. Durable and discreet, it’s perfect for maintaining consistent temperature settings in shared or public spaces, backed by a 1-year limited warranty.

## Description

Small, clear thermostat guard prevents unwanted/unauthorized temperature on your thermostat. Includes built-in lock and key. Fits the following Honeywell thermostat models: CT87, CT3x without the wall plate and the RTH5100B (guard must be removed to access this product's battery door). May fit other thermostats of similar size. Interior dimensions: 4-7/16 W x 4-7/16 H x 2-1/4 D (inches). Outside dimensions: 5-7/8 W x 5-7/8 H x 2-1/2 D (Inch). Includes: cover, base, lock and key, and mounting hardware. 8.8 x 13 x 9.5 inches (Packaged product)

Review: Super easy to install, durable, perfect size - We have the square Johnson Controls thermostats at work for every zone. Several of these are in places where the general public has the opportunity to make adjustments. Despite our HVAC only having a 3 degree variance on either side of neutral, this does cause disturbances in the workplace. This is a great solution. It seems sturdy for the money, and works great. It installed super easy and the key, while tight, works excellently. It's sturdy enough to discourage people from trying to pry it open and would fit those standard round home thermostats too. It comes with all the parts you need and keeps people from meddling with the controls.
Review: Great For Google Nest Thermostats - Bought four for our church. Great thermostat covers for Nest Thermostats. I need these because people would occasionally bump into it and even tho the thermostats are set in the lock mode, it would cause it to set to a hotter default temp. Now I don’t have to worry about someone messing with them.

## Features

- Clear plastic cover with built-in lock and a set of keys.Fits Thermostats 4.375H x 4.375W inches or Smaller
- For use with Honeywell Home thermostats. It protects against unwanted changes to AC/Heating preferred settings
- Inside dimensions: 4.44"W x 4.44"W x 2.25"D
- Outside dimensions: 5.88"W x 5.88"H 2.50"D
- Fits Thermostats 4.375H x 4.375W inches or Smaller

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B007EJA7VC |
| Backlight | No |
| Batteries Included? | No |
| Batteries Required? | No |
| Best Sellers Rank | #174,279 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #146 in Home Thermostat Accessories |
| Brand | Honeywell Home |
| Color | Clear |
| Control Method | Push Button |
| Controller Type | Push Button |
| Customer Reviews | 4.3 4.3 out of 5 stars (2,405) |
| Date First Available | March 13, 2012 |
| Global Trade Identification Number | 00085267776905 |
| Included Components | Thermostat guard, wall anchors, screws, key |
| Is Discontinued By Manufacturer | No |
| Item Package Quantity | 1 |
| Item Weight | 9.6 ounces |
| Item model number | CG510A1019/N |
| Manufacturer | Honeywell Home |
| Material | Plastic |
| Model Name | CG510A1019/N |
| Mounting Type | Wall Mount |
| Part Number | CG510A1019/N |
| Power Source | Hardwired |
| Product Dimensions | 5.88 x 2.5 x 5.88 inches |
| Size | 5.88 x 5.88 x 2.5 inches |
| Special Feature | Low Voltage |
| Special Features | Low Voltage |
| Specific Uses For Product | Furnace |
| Style | Traditional |
| Temperature Control Type | Heating |
| UPC | 085267776905 |
| Warranty Description | 1 year limited warranty. |

## Product Details

- **Brand:** Honeywell Home
- **Color:** Clear
- **Controller Type:** Push Button
- **Model Name:** CG510A1019/N
- **Special Feature:** Low Voltage

## Images

![Genuine Honeywell Home CG510A Thermostat Guard, Small, Fits Thermostats 4.375H x 4.375W inches or smaller - Image 1](https://m.media-amazon.com/images/I/71u8KtjeWeL.jpg)
![Genuine Honeywell Home CG510A Thermostat Guard, Small, Fits Thermostats 4.375H x 4.375W inches or smaller - Image 2](https://m.media-amazon.com/images/I/710OBaTIWeL.jpg)
![Genuine Honeywell Home CG510A Thermostat Guard, Small, Fits Thermostats 4.375H x 4.375W inches or smaller - Image 3](https://m.media-amazon.com/images/I/61BSHThRo+L.jpg)
![Genuine Honeywell Home CG510A Thermostat Guard, Small, Fits Thermostats 4.375H x 4.375W inches or smaller - Image 4](https://m.media-amazon.com/images/I/51P2nTVAbjL.jpg)
![Genuine Honeywell Home CG510A Thermostat Guard, Small, Fits Thermostats 4.375H x 4.375W inches or smaller - Image 5](https://m.media-amazon.com/images/I/61QZF-B3qkL.jpg)

## Available Options

This product comes in different **Size** options.

## Questions & Answers

**Q: Can I order multiple units that all use the same key?**
A: I ordered three of these and they all have the same key.

**Q: Is cover attached to frame to prevent any one from using knife to pop off the cover from the top to get to thermastat?**
A: If someone really wanted to get the cover off they could. We have a lot of out of town guest and it keeps them from changing the temps.

**Q: What are the dimensions?  There are two listed: a) 8.8 x 13 x 9.5 inches. OR b) 5-7/8 W x 5-7/8 H x 2-1/2 D.  So which is it?**
A: 5-7/8 hx2-1/2

**Q: if my thermostat size is 5 1/2 " x 5 1/5 " x 1 1/2 will this work?**
A: No

## Customer Reviews

### ⭐⭐⭐⭐⭐ Super easy to install, durable, perfect size
*by E***N on September 5, 2013*

We have the square Johnson Controls thermostats at work for every zone. Several of these are in places where the general public has the opportunity to make adjustments. Despite our HVAC only having a 3 degree variance on either side of neutral, this does cause disturbances in the workplace. This is a great solution. It seems sturdy for the money, and works great. It installed super easy and the key, while tight, works excellently. It's sturdy enough to discourage people from trying to pry it open and would fit those standard round home thermostats too. It comes with all the parts you need and keeps people from meddling with the controls.

### ⭐⭐⭐⭐⭐ Great For Google Nest Thermostats
*by J***S on July 31, 2024*

Bought four for our church. Great thermostat covers for Nest Thermostats. I need these because people would occasionally bump into it and even tho the thermostats are set in the lock mode, it would cause it to set to a hotter default temp. Now I don’t have to worry about someone messing with them.

### ⭐⭐⭐⭐⭐ Perfect fit
*by P***W on December 3, 2024*

Very easy to install with wood glue clear no screws needed no need to worry about anyone turning system up or down very secure easy to lock and unlock don’t think about it just buy it

## Frequently Bought Together

- Genuine Honeywell Home CG510A Thermostat Guard, Small, Fits Thermostats 4.375H x 4.375W inches or smaller
- Honeywell Home CT87K1004 The Round Heat Only Manual Thermostat
- Honeywell Home CT87N1001 The Round Non-Programmable Manual Thermostat, Large, White

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*Product available on Desertcart South Africa*
*Store origin: ZA*
*Last updated: 2026-03-15*