---
product_id: 48057978
title: "Timeguard NTT03 24-Hour/7-Day Compact Electronic Immersion Heater Timeswitch,White"
brand: "timeguard"
price: "493.73 DT"
currency: TND
in_stock: true
reviews_count: 8
category: "Timeguard"
url: https://www.desertcart.tn/products/48057978-timeguard-ntt03-24-hour-7-day-compact-electronic-immersion-heater
store_origin: TN
region: Tunisia
---

# 28 weekly on/off programs 16A load rating Extra-large blue LED screen Timeguard NTT03 24-Hour/7-Day Compact Electronic Immersion Heater Timeswitch,White

**Brand:** timeguard
**Price:** 493.73 DT
**Availability:** ✅ In Stock

## Summary

> ⏳ Take control of your energy, save money, and never forget to switch off again!

## Quick Answers

- **What is this?** Timeguard NTT03 24-Hour/7-Day Compact Electronic Immersion Heater Timeswitch,White by timeguard
- **How much does it cost?** 493.73 DT with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/48057978-timeguard-ntt03-24-hour-7-day-compact-electronic-immersion-heater)

## Best For

- timeguard enthusiasts

## Why This Product

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

## Key Features

- • **Sleek Compact Design:** Modern white finish and compact size fit seamlessly into any space without clutter.
- • **Effortless Visibility:** Extra-large blue LED backlit screen ensures you never miss your settings, even in low light.
- • **Boost Mode Convenience:** Instantly heat water on demand with a boost button that auto-switches off, perfect for busy lifestyles.
- • **Energy-Smart Operation:** 16A load rating supports powerful heaters while optimizing electricity use to slash bills.
- • **Precision Scheduling Mastery:** Set up to 28 on/off cycles weekly for ultimate control over your immersion heater.

## Overview

The Timeguard NTT03 is a compact, easy-to-program electronic immersion heater timeswitch featuring 28 weekly on/off programs, a large blue LED display for clear visibility, and a 16A load rating. Designed for energy efficiency and convenience, it includes a boost function for quick heating and clear LED indicators to monitor power status, making it an essential upgrade for smart home energy management.

## Description

Product Description &Nbsp; operating instructions (596.52KB) EN contact current max: 16A contact style: - Controller output: Digital SVHC: no SVHC (17-dec-2014) time Max: 168H MSL: - Box Contains 1 x Electronic Immersion Heater Timeswitch

Review: Excellent immersion timer — easy to use but allow extra depth for wiring - I decided to fit this to my immersion heater as the cost of oil has increased, and using electricity on a timed schedule is now working out much cheaper. The unit arrived well packaged and feels solid and well made. Once installed, the display is clear and easy to read, and the indicator lights make it obvious when the unit is powered and when it’s actively supplying the heater. Installation is fairly straightforward if you’re comfortable with wiring. The terminals are a decent size, so handling the heavier-duty cables typically used for immersion heaters isn’t a problem. Programming is also quite simple once you follow the instructions properly, and having multiple on/off periods is very useful for taking advantage of off-peak electricity. My only real caveat is the depth of the unit. It’s not particularly slim, and with heavier cables in the back box space can be tight. In my case, I fitted a 10mm spacer between the wall and the unit, which made installation much easier and avoided having to force the wiring into a confined space. I’ve included a photo of this so you can see how it sits. I’ve also included a photo of the unit installed, which gives a good idea of the finished look. Overall, this is a reliable and easy-to-use timer that does exactly what it should — just plan ahead for the depth when installing.
Review: Has the potential for big electricity savings - This 24 hour / 7 day immersion heater time switch replaced an old 24-hour electro-mechanical time switch. It was easy to install; the connections are very robust and offer ample opportunity to get a good grip on the cables! When I switched the immersion heater circuit back on at the consumer unit, the first thing I noticed was how much less electricity it used, compared to the old electro-mechanical switch. Whilst you could never say that the old switch guzzled electricity, there was a slight but noticeable slow down in the wheel in my meter. However, when I switched the electricity back on after installing this, there was no noticeable speed up of the wheel in the meter. This brings me to why we replaced it; more than half of the week, we don't need the immersion heater on; so for those days, our water was heated up and went cool without being used. Now we can set four on and off times for each day - so we only need to heat the water on the days we need it! For us, with definite usage requirements, this was a great advantage, and one that will save us lots on our electricity bills; your mileage may vary. The unit itself is easy to programme, it has a very bright blue display, and is very versatile. Despite what others have said, it is possible to switch it permanently on, and permanently off. It's a nice compact unit, is easy on the eyes and on the wallet!

## Features

- 4 on/4 off easy-set programme periods per day, 28 on/28 off programmes per week
- Extra large 'easy view' Screen with blue LED backlighting
- Red LED 'mains on' And green LED 'output' Indicators for easy viewing
- 16(4)A load rating

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00BJIB97K |
| Batteries Required? | No |
| Batteries included? | No |
| Best Sellers Rank | 21,232 in DIY & Tools ( See Top 100 in DIY & Tools ) 38 in Timers |
| Colour | White |
| Customer Reviews | 4.5 4.5 out of 5 stars (831) |
| Date First Available | 1 Jan. 2010 |
| Display style | LED |
| Finish | Smooth |
| Included Components | Heater Timeswitch |
| Item Package Quantity | 1 |
| Item Weight | 171 g |
| Item model number | NTT03 |
| Manufacturer | Timeguard |
| Material | Plastic |
| Part Number | NTT03 |
| Plug profile | Tabletop |
| Power Source | Corded Electric |
| Product Dimensions | 11.7 x 16.9 x 23.2 cm; 171.1 g |
| Size | 12 |
| Style | Compact |
| Voltage | 230 Volts |

## Product Details

- **Brand:** Timeguard
- **Model name:** Current
- **Product dimensions:** 10D x 10W x 10H centimetres
- **Controller type:** Hand Control
- **Special feature:** Programmable
- **Colour:** White
- **Specific uses for product:** Boiler
- **Included components:** Heater Timeswitch
- **Power source:** Corded Electric
- **Item weight:** 0.17 Kilograms

## Images

![Timeguard NTT03 24-Hour/7-Day Compact Electronic Immersion Heater Timeswitch,White - Image 1](https://m.media-amazon.com/images/I/41XA45fQ9IL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Excellent immersion timer — easy to use but allow extra depth for wiring
*by O***. on 22 March 2026*

I decided to fit this to my immersion heater as the cost of oil has increased, and using electricity on a timed schedule is now working out much cheaper. The unit arrived well packaged and feels solid and well made. Once installed, the display is clear and easy to read, and the indicator lights make it obvious when the unit is powered and when it’s actively supplying the heater. Installation is fairly straightforward if you’re comfortable with wiring. The terminals are a decent size, so handling the heavier-duty cables typically used for immersion heaters isn’t a problem. Programming is also quite simple once you follow the instructions properly, and having multiple on/off periods is very useful for taking advantage of off-peak electricity. My only real caveat is the depth of the unit. It’s not particularly slim, and with heavier cables in the back box space can be tight. In my case, I fitted a 10mm spacer between the wall and the unit, which made installation much easier and avoided having to force the wiring into a confined space. I’ve included a photo of this so you can see how it sits. I’ve also included a photo of the unit installed, which gives a good idea of the finished look. Overall, this is a reliable and easy-to-use timer that does exactly what it should — just plan ahead for the depth when installing.

### ⭐⭐⭐⭐⭐ Has the potential for big electricity savings
*by S***F on 12 September 2014*

This 24 hour / 7 day immersion heater time switch replaced an old 24-hour electro-mechanical time switch. It was easy to install; the connections are very robust and offer ample opportunity to get a good grip on the cables! When I switched the immersion heater circuit back on at the consumer unit, the first thing I noticed was how much less electricity it used, compared to the old electro-mechanical switch. Whilst you could never say that the old switch guzzled electricity, there was a slight but noticeable slow down in the wheel in my meter. However, when I switched the electricity back on after installing this, there was no noticeable speed up of the wheel in the meter. This brings me to why we replaced it; more than half of the week, we don't need the immersion heater on; so for those days, our water was heated up and went cool without being used. Now we can set four on and off times for each day - so we only need to heat the water on the days we need it! For us, with definite usage requirements, this was a great advantage, and one that will save us lots on our electricity bills; your mileage may vary. The unit itself is easy to programme, it has a very bright blue display, and is very versatile. Despite what others have said, it is possible to switch it permanently on, and permanently off. It's a nice compact unit, is easy on the eyes and on the wallet!

### ⭐⭐⭐⭐ Timeguard NTT03 24-Hour/7-Day Compact Electronic Immersion Heater Timeswitch
*by F***L on 11 November 2013*

I purchased this unit to replace a standard wall switch. As our oil fired water heater died, we are entirely reliant on the immersion heater for hot water at the moment. However as it was fitted with an ordinary on/off switch there would be little or no hot water first thing in the morning and it was far too easy to forget to turn it off, which soon starts costing a fortune. The water heater is now programmed to come on for a half hour before anyone gets up (and while the power is cheaper) and to turn off at several times throughout the day (in case it somehow gets turned on and forgotten). We can also get a 1 or 2 hour 'boost' on demand and not worry about forgetting to turn it off. The NTT03 fits into a standard pattress box, but it might be a bit of a squeeze if you have a lot of excess wire. There is no Earth connector on this switch, so you might want to have some wire nuts on hand in order to securely connect the earth wires together if there is no earth terminal in the pattress box. Wiring took ~15-20 minutes, including removing the old switch. The terminals are clearly labeled and the instructions straightforward. The only caveat is that the screws holding the bezel in place have _very_ shallow phillips heads (none of my crosspoints could actually get any grip on them). I had to resort to a small flathead screwdriver to get them in and out or risk stripping the head. The instructions for setting up the timer are straightforward (pretty much identical to every other unit of this sort that I have ever used) As an added bonus, The display is backlit while in use so it's easy to see what you are doing. Unit has a built in rechargeable battery so it should keep settings for a good while if it loses mains power or gets turned off at the breaker/isolator. Straight forward installation, Straightforward operation. Does what it's supposed to. I docked a star for the needlessly cheap bezel screws which could have easily been stripped making the whole process a lot more difficult. Note. that this unit NTT03 is set up 'out of the box' for an immersion heater, the included instructions suggested that the NTT04 'general purpose' switch would also be suitable but might need additional adjustments during installation.

## Frequently Bought Together

- Timeguard NTT03 24-Hour/7-Day Compact Electronic Immersion Heater Timeswitch,White
- Schneider Electric Lisse Gang Surface Pattress, 25 mm
- Timeguard FST24 24 Hour Fused Spur Timeswitch Storage/Immersion Heater

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*Product available on Desertcart Tunisia*
*Store origin: TN*
*Last updated: 2026-05-31*