---
product_id: 166958677
title: "RDJ100 Programmable Thermostat"
brand: "siemens"
price: "€ 109.96"
currency: EUR
in_stock: true
url: https://www.desertcart.hr/products/166958677-rdj100-programmable-thermostat
store_origin: HR
region: Croatia
---

# 24-hour precise control Large clear LCD display 4 versatile operating modes RDJ100 Programmable Thermostat

**Brand:** siemens
**Price:** € 109.96
**Availability:** ✅ In Stock

## Summary

> 🔥 Take control of your comfort with RDJ100 – where smart meets stylish!

## Quick Answers

- **What is this?** RDJ100 Programmable Thermostat by siemens
- **How much does it cost?** € 109.96 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/166958677-rdj100-programmable-thermostat)

## Best For

- siemens enthusiasts

## Why This Product

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

## Key Features

- • **See It Clearly:** Large, easy-to-read LCD display keeps you informed at a glance
- • **Master Your Climate:** 24-hour programmable control for perfect temperature all day long
- • **Smart Mode Selection:** Automatic, Comfort, Energy Saving & Frost Protection modes tailored to your lifestyle
- • **Effortless Installation:** Screw terminals compatible with solid and stranded wiring for quick setup
- • **Stay Ahead of Maintenance:** Built-in service interval reminder ensures your system runs smoothly

## Overview

The Siemens RDJ100 Programmable Thermostat offers precise 24-hour temperature control with four customizable modes including energy saving and frost protection. Featuring a large LCD display and easy installation via screw terminals, it’s designed for modern HVAC systems to optimize comfort and efficiency.

## Description

Siemens RDJ100 programmable thermostat

## Features

- 24 Hour temperature control switch, Adjustment dial, Switching Voltage - 24 - 250 VAC
- 2 position or PID control to switch on/off heating systems, Dimensions - H 120 x W 90 x D 32mm
- Features 4 operating modes, Automatic, Comfort, Energy saving, Frost protection
- Service interval reminder, Large clear LCD display, Screw terminals for solid and stranded
- Power Supply - 2 x AA 1.5V Alkaline Batteries recommended, Dims - 120x90x26.9mm

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | Siemens |
| Part Number | TRV_2136973 |
| Product Dimensions | 50.8 x 15.24 x 15.24 cm; 330 g |
| Item model number | RDJ100 |
| Colour | Colour May Vary |
| Style | Modern |
| Power Source | Programmable |
| Voltage | 1.5 Volts |
| Item Package Quantity | 1 |
| Display style | LCD |
| Plug profile | Wall Mount |
| Special Features | Frost Protection, Programmable |
| Usage | Boiler |
| Included Components | Thermostat |
| Batteries included? | No |
| Batteries Required? | No |
| Item Weight | 330 g |

## Product Details

- **Brand:** SIEMENS
- **Model name:** Siemens RDJ100 PROGRAMMABLE Thermostat
- **Controller type:** Mechanical knob
- **Special feature:** Frost Protection, Programmable
- **Colour:** Colour May Vary
- **Specific uses for product:** Boiler
- **Temperature Control Type:** Programmable
- **Connectivity technology:** Wi-Fi
- **Included components:** Thermostat
- **Power source:** Programmable

## Images

![RDJ100 Programmable Thermostat - Image 1](https://m.media-amazon.com/images/I/618FKYiXT-L.jpg)

## Questions & Answers

**Q: I have a rdh10rf control unit and want to upgrade to this unit. is this compatible with my rcr10/433-gb receiver**
A: I ended up sending this back as it wouldn’t sync to the transmitter already next to my boiler. Ended up having to buy a new receiver and transmitter.

**Q: Is this compatable with rdj10rf receiver?  the receiver is already installed and working. our rdj10rf theromostat is broken, but receiver is still ok.**
A: It replaced a thermostat which was not a Siemans model

**Q: Does this models screen light up?**
A: Don’t know as I had to send it back. It appears that just buying the thermostat was not an option. I got a heating engineer to source me a new thermostat and transmitter and fit it for me.

**Q: What are the correct dimensions? The ones listed are the size of a shoe box!**
A: It is 120mm high, 90mm wide.  26.9mm deep.

## Frequently Bought Together

- Siemens RDJ100 Programmable Thermostat
- Siemens - RDJ100RF/SET - Room Thermostat Radio Frequency Set with 24-Hour time Switch (Transmitter and Receiver)
- SIEMENS RDJ100RF Digital Room STAT

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**Shop now:** [https://www.desertcart.hr/products/166958677-rdj100-programmable-thermostat](https://www.desertcart.hr/products/166958677-rdj100-programmable-thermostat)

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*Product available on Desertcart Croatia*
*Store origin: HR*
*Last updated: 2026-02-20*