---
product_id: 17132005
title: "T7850 Colortouch 7 Day Programmable Thermostat with Built in Wifi (Replaces T5900 and Acc0454)"
brand: "venstar"
price: "R7534"
currency: ZAR
in_stock: true
reviews_count: 8
url: https://www.desertcart.co.za/products/17132005-t7850-colortouch-7-day-programmable-thermostat-with-built-in-wifi
store_origin: ZA
region: South Africa
---

# Superior LED dimming with 1000+ bulb support Built-in WiFi for remote control Alexa & voice assistant compatibility T7850 Colortouch 7 Day Programmable Thermostat with Built in Wifi (Replaces T5900 and Acc0454)

**Brand:** venstar
**Price:** R7534
**Availability:** ✅ In Stock

## Summary

> 🌡️ Elevate your comfort with smart control and style — because your home deserves the best!

## Quick Answers

- **What is this?** T7850 Colortouch 7 Day Programmable Thermostat with Built in Wifi (Replaces T5900 and Acc0454) by venstar
- **How much does it cost?** R7534 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/17132005-t7850-colortouch-7-day-programmable-thermostat-with-built-in-wifi)

## Best For

- venstar enthusiasts

## Why This Product

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

## Key Features

- • **Smart Climate Command:** Control your home temperature from anywhere with built-in WiFi and smartphone access.
- • **Voice-Activated Comfort:** Seamlessly integrates with Alexa, Google Assistant, and Apple HomeKit for effortless voice control.
- • **Next-Level Lighting Control:** Optimized dimming for over 1,000 LED bulbs, supporting up to 100W of dimmable lighting power.
- • **7-Day Programmable Precision:** Set your ideal heating and cooling schedule with 4-state heat and 2-stage cooling for ultimate energy savings.
- • **Customizable Digital Display:** Personalize your thermostat screen with your own photos, blending tech with your style.

## Overview

The Venstar T7850 is a sleek, 7-day programmable thermostat featuring built-in WiFi for remote smartphone and computer control. Compatible with Alexa, Google Assistant, and Apple HomeKit, it offers voice-activated temperature management. It excels in LED dimming performance, supporting over 1,000 bulbs and up to 100W of dimmable lighting. With a customizable digital display and advanced heating/cooling stages, it delivers precise, energy-efficient climate control for modern smart homes.

## Description

Brand New Venstar T7850 Thermostat. This thermostat come with built in WiFi to connect to your home network. Once connected you will be able to control your thermostat from your smart phone or computer. You can also customize the thermostat by adding your own pictures just like a digital picture frame. The thermostat does require the use of a common wire for the thermostat to power on, for more info on this you can visit Venstar's youtube channel for some how to videos. Now compatible with Alexa to ensure the perfect temperature anywhere in your home.

## Features

- Works with Alexa for voice control (Alexa device sold separately).
- Provides the best dimming performance for LED bulbs. Tested and recommended for use with over 1,000 bulbs (for recommended LEDs, please see "Technical Specification")
- Works with up to 100W of dimmable LED/CFL or 300W incandescent/halogen bulbs
- Lamp Dimmer simply plugs into a standard outlet and can be used with up to two lamps
- Dimmer controls up to 17 bulbs per circuit (based on 8.5W LED bulbs, 60W incandescent equivalent)
- Turns lights on/off or raise/lower to adjust brightness using included Pico remote
- Connects with more leading smart home brands (including desertcart Alexa, Apple HomeKit, the Google Assistant, Nest, Serena shades, and Sonos) than any other leading smart lighting control brand (Smart Bridge requried)
- 7-Day programmable, Auto-changeover
- Built In Wifi To connect to your smart phone Or Computer
- 4 State Heat 2 Stage Cooling

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | Venstar |
| Controller Type | Amazon Alexa, Apple HomeKit, Vera, nest |
| Special Feature | Programmable |
| Color | White |
| Specific Uses For Product | Heating, Cooling |
| Temperature Control Type | programmable |
| Connectivity Technology | Wi-Fi |
| Included Components | Pico remote, Temperature Sensor |
| Power Source | Electric |
| Voltage | 24 Volts |
| Shape | Rectangular |
| Display Type | Digital |
| Control Type | Remote Control |
| Control Method | Voice |
| Connectivity Protocol | Wi-Fi |
| Mounting Type | Wall Mount |
| Style | Digital,Wifi |
| Backlight | Yes |
| UPC | 716670968600 384929207215 |
| Manufacturer | Venstar |
| Part Number | T7850 |
| Item Weight | 12 ounces |
| Product Dimensions | 2 x 6.2 x 4.8 inches |
| Item model number | T7850 |
| Is Discontinued By Manufacturer | No |
| Size | 6.25 X 4.75 X 2" |
| Item Package Quantity | 1 |
| Type of Bulb | LED |
| Special Features | Programmable |
| Batteries Included? | No |
| Batteries Required? | No |
| Battery Cell Type | Alkaline |

## Product Details

- **Brand:** Venstar
- **Controller Type:** Amazon Alexa, Apple HomeKit, Vera, nest
- **Special Feature:** Programmable
- **Color:** White
- **Specific Uses For Product:** Heating, Cooling

## Images

![T7850 Colortouch 7 Day Programmable Thermostat with Built in Wifi (Replaces T5900 and Acc0454) - Image 1](https://m.media-amazon.com/images/I/41WLty2xNbL.jpg)

## Questions & Answers

**Q: Is Venstar T7850 Alexa compatible**
A: I found this on Venstar web site http://venstar.com/smart/alexa/tells you everything to do with it

**Q: Has your Wifi connectivity been reliable with your Venstar thermostat? I see a lot of complaints but wonder if it has improved recently?**
A: I own 2 Venstar T78850 Thermostats.   Which are located in different homes.  Both have no connect Wi-Fi connectivity issues.  The only time I lose connectivity is when the internet service to the house fails, which is not a Wi-fi issue, but an issue with the Internet service itself.

**Q: is it z-wave compatible?**
A: I do not believe so but I would go to the Venstar website and email technical support with your question.

**Q: Does it support apple home kit?**
A: It works with Alexa so I would guess yes.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Three Cheers for Amazon!
*by G***Y on January 26, 2016*

I purchased the Venstar T7850 Colortouch in November for use in my vacation home. After installing it I found the thermostat had a problem and did not communicate with their cell phone app.I contacted Venstar support and explained the problem and even included pictures from the thermostat, but they never replied to my email.As a last resort I contacted Amazon Support. They immediately replied telling me to return the thermostat to them for testing. Within a week I got a reply that a replacement was being shipped.The replacement thermostat worked perfectly as advertised. It's really handy to check the temperature of a home 200 miles away and know the furnace is working. Last week I used the app to turn the temperature up (the vacation home is in Northern Michigan) so it was warm and comfy when I arrived.A big THANK YOU to AMAZON for their fast and helpful support!

### ⭐⭐⭐ Great Features. Poor Quality
*by G***K on May 20, 2025*

Recently I had two of these thermostats installed by my AC company One works fine. The other lost wifi after one day. I ordered this one and I snapped it into place. It had no WiFi. Now a replacement is coming in. I will follow up. Also, the manufacturer Venstar does not have a contact phone number. All is done through email. Very poor customer service.

### ⭐⭐⭐⭐⭐ Love it
*by R***E on August 15, 2019*

This works fantastic for my needs. I have it linked with Alexa and to my smart phone via WiFi which is built in. Not external card needed (only for pics). I can use it remotely and/or the touchscreen. I’ve had one for many years, way before Alexa and have loved it. Just had the older model. I love how it was the same size and clipped right onto the old base.

## Frequently Bought Together

- Venstar T7850 Colortouch 7 Day Programmable Thermostat with Built in Wifi (Replaces T5900 and Acc0454)
- Venstar Acc-TSENWIFIPRO Pro Wi-Fi Wireless Temperature Sensor

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**Shop now:** [https://www.desertcart.co.za/products/17132005-t7850-colortouch-7-day-programmable-thermostat-with-built-in-wifi](https://www.desertcart.co.za/products/17132005-t7850-colortouch-7-day-programmable-thermostat-with-built-in-wifi)

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*Product available on Desertcart South Africa*
*Store origin: ZA*
*Last updated: 2026-02-01*