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🔐 Lock in comfort, lock out chaos — your thermostat’s new best friend!
The Honeywell Home CG512A1009 Large Thermostat Guard is a lockable, clear acrylic cover designed to fit Honeywell and most other thermostats up to 8.25" W x 5.75" H. It features a tamper-proof inner shelf and a heavy-duty key lock to prevent unauthorized adjustments. The UV and chemical-resistant cover ensures long-lasting clarity and protection, making it ideal for both residential and commercial use.
| ASIN | B0002YSV78 |
| Additional Features | Lockable |
| Backlight | No |
| Best Sellers Rank | #36,466 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #28 in Home Thermostat Accessories |
| Brand | Honeywell Home |
| Brand Name | Honeywell Home |
| Color | Clear |
| Control Method | Touch |
| Controller Type | Hand Control |
| Customer Reviews | 4.4 out of 5 stars 3,448 Reviews |
| Display Type | digital |
| Global Trade Identification Number | 00085267990011 |
| Included Components | Key, Large Thermostat Guard, Mounting Hardware |
| Item Dimensions D x W x H | 3.25"D x 8.25"W x 5.75"H |
| Item Type Name | Thermostat Guard |
| Item Weight | 1.3 Pounds |
| Manufacturer | Honeywell Home |
| Manufacturer Part Number | CG512A1009/C |
| Manufacturer Warranty Description | 1 year product warranty. |
| Material Type | Multi |
| Model Name | Honeywell CG512A1009 Large Thermostat Guard with Inner Shelf to Prevent Tampering |
| Model Number | CG512A1009 |
| Mounting Type | Wall Mount |
| Power Source | Manual Winding |
| Product Dimensions | 3.25"D x 8.25"W x 5.75"H |
| Product Style | Minimalist |
| Screen Size | 5 Inches |
| Shape | Rectangular |
| Smart Home Compatibility | Not Smart Home Compatible |
| Special Feature | Lockable |
| Specific Uses For Product | Air Conditioner, Electric Baseboard Heater, Furnace, Heat Pump |
| Temperature Control Type | Heating and Cooling |
| UPC | 085267990011 |
| Unit Count | 1.0 Count |
N**R
Good quality
They are made a little cheap.But they really do the job.I recommend the product.Just be very careful opening and installing this product
C**E
Super Big!
This was prefect and easy to install! We have a really large (Emmerson) thermostat, and I had bought a couple other "universal large" covers but they where too small. My Mother has Alzheimer's and turns up the heat at 3 am(we live in the desert) to 95'. So this is a great safety measure.
R**Y
Easy to install
Keep people from changing the thermostat in my home. It was easy to install and comes with two keys
P**I
Simple Protection That Works Exactly as Expected
This Honeywell thermostat guard is a really practical solution if you need to prevent tampering or accidental adjustments. Installation was straightforward and didn’t take long, and once it was mounted it felt very secure and sturdy. The clear cover makes it easy to see the thermostat display while still keeping it protected, which is exactly what I needed. The lock works well and gives peace of mind in shared or high-traffic areas where settings might otherwise get changed. One thing to pay attention to is sizing make sure your thermostat fits within the listed dimensions before purchasing. It’s a large cover, but it still won’t fit every model, so double-checking is important. Overall, it’s a simple but effective product that does its job well and adds a layer of protection without getting in the way.
A**E
Works great to keep family from fighting over thermostat
It looks big on the wall but it fits the thermostat perfectly. Just what we needed to keep people from fighting over control of the thermostat. Definitely worth it if family can't agree on temperature for the house.
A**R
Perfect
Nice and big and it should get the job done! I'm so sick of coming home to find the A/C turned off because the 70 year old man is cold in 80 degrees.
J**E
Very cheap made
Was very easy to install. It would also be very easy to get into without the key. Yet using the key is a nightmare. The key fit is terrible. Would not purchase again.
G**H
Highly recommended seller
Great deal and item as described.
M**Y
nice
good
H**N
It’s perfect!
It fits perfectly! It’s in a rooming house where tenants were constantly changing the heat settings: it’s a godsend!!!
B**R
Great large size!
Fits standard ducted controller and zone switch perfectly!
C**N
groot genoeg om de thermostaat te omvatten en beschermen.
De thermostaat werd "misbruikt" door veel te hoge temperaturen te vragen. De beschermkap moet dat voortaan verhinderen. Het is de enige thermostaatbeschermer die groot genoeg is voor de aanwezige thermostaat.
O**L
Bien
Un peu TROP grande. Dommage qu'il ni est pas le choix de tailles. Sinon bien
Trustpilot
2 weeks ago
2 months ago