Can this be used on a 12v system?

Yes. I am using one on a 12 volt system and 5 on 500 milivolt systems. It should also work on a 24 volt system. It should be noted that this thermostat receives power to run the display and electronics from 2 AAA batteries that last a long time. These are required on a 500 milivolt system. The batteries can be omitted on a 12 or 24 volt system if (and only if) you have a 3 wire connection to the thermostat. The 3rd wire is the common terminal (which is not required for a mechanical thermostat with no clock, light, or electronics). You may use the batteries with a 3 wire system that doesn't need them. I believe this will cause it to hold its setting if the power goes out and comes back on. I believe (but am not sure) that the setting will be lost on a 3 wire system without batteries if the power goes out. On a 500 milivolt system the batteries are required.

Does this work on a gas fireplace with a 2 wire setup?

I am using this thermostat on a 2 wire setup. It works fine. Boba

How do you program this thermostat? (honeywell pro 1000)

There is no programming of this thermostat. It is for heat only.

Does this work for 12v DC furnace for camper/travel trailers?

Yes. I replaced the OEM thermostat that failed the first night in my 2017 Airstream with this exact model TH11000-1000 three years ago and it's worked great ever since. And I had the same model in my little camping trailer as well. Both were 12v propane fired forced air, although that makes no difference since the electronics in this thermostat are separately powered by two AAA batteries and all it has to do is make and break the two-wire heater connection.

Th1100dv1000 U Pro 1000 Vertical Non Programmable Thermostat

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Description

🔥 Stay cozy, stay smart — the thermostat that works as hard as you do! 📲

EFFORTLESS CONTROL - Simple push-button interface for intuitive temperature adjustments
SLEEK SPACE SAVVY - Fits perfectly in tight spots with a slim 4.7x2.9x1.1 inch profile
BRIGHT CLEAR DISPLAY - Backlit LCD ensures you never miss your ideal temp, even in dim lighting
PLUG PLAY INSTALLATION - Quick 10-minute setup with just two wires and included batteries
TRUSTED AMERICAN QUALITY - Proudly made in the USA by Honeywell, a leader in HVAC innovation

The Honeywell TH1100DV1000/U Pro 1000 is a compact, vertical non-programmable thermostat designed for easy installation and reliable heating control. Featuring a bright backlit LCD, simple push-button operation, and powered by 2 AAA batteries, it’s an ideal upgrade for tight spaces like trailers or small rooms. Made in the USA, this thermostat combines trusted Honeywell quality with user-friendly design to keep your environment perfectly comfortable.

Specifications

ASIN	B071X9DGHY
Additional Features	Temperature Display
Backlight	Yes
Best Sellers Rank	#34,488 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #42 in Home Programmable Thermostats
Brand	Honeywell
Brand Name	Honeywell
Color	White
Connectivity Protocol	Wi-Fi
Connectivity Technology	Wi-Fi
Control Method	Touch
Control Type	Button Control
Controller Type	Push Button
Customer Reviews	4.6 out of 5 stars 1,358 Reviews
Display Type	LCD
Finish Types	Glossy
Included Components	Thermostat
Item Dimensions D x W x H	1.3"D x 1.8"W x 6.2"H
Item Weight	0.05 Kilograms
Manufacturer	Honeywell
Manufacturer Part Number	TH1100DV1000/U
Material Type	Plastic
Model Name	TH1100DV1000/U
Model Number	TH1100DV1000/U
Mounting Type	Wall Mount
Number of Batteries	2 AAA batteries required.
Power Source	Corded Electric
Product Dimensions	1.3"D x 1.8"W x 6.2"H
Product Style	Modern
Screen Size	8 Inches
Shape	Rectangular
Special Feature	Temperature Display
Specific Uses For Product	Air Conditioner
Temperature Control Type	Heating
Unit Count	1.0 Count
Voltage	24 Volts

Reviews

R**S

26.11.2021

T**.

14.05.2025

M**O

11.12.2024

A**R

27.04.2026

L**O

10.12.2025

C**T

7.05.2025

J**Y

20.05.2025

E**N

31.05.2025

D**G

1.05.2026

K**N

27.03.2026

K**S

27.11.2025

W**T

3.05.2026

C**L

12.11.2025

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Rp1476006

Duties & taxes included

In stock

Sold byAmazon IndonesiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Indonesia.

Secure transaction

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TH1100DV1000/U Pro 1000 Vertical Non-Programmable Thermostat

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Description

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Common Questions