---
product_id: 53855440
title: "Honeywell ST9400A1002 1 Day 2-Channel Programmer"
brand: "honeywell"
price: "€ 123.46"
currency: EUR
in_stock: false
reviews_count: 8
url: https://www.desertcart.ie/products/53855440-honeywell-st9400a1002-1-day-2-channel-programmer
store_origin: IE
region: Ireland
---

# Automatic Summer/Winter time change Largest ever backlight display Fits industry standard blackplate Honeywell ST9400A1002 1 Day 2-Channel Programmer

**Brand:** honeywell
**Price:** € 123.46
**Availability:** ❌ Out of Stock

## Summary

> 🔥 Stay warm, stay smart — the ultimate heating programmer for the savvy home 🏡

## Quick Answers

- **What is this?** Honeywell ST9400A1002 1 Day 2-Channel Programmer by honeywell
- **How much does it cost?** € 123.46 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.ie](https://www.desertcart.ie/products/53855440-honeywell-st9400a1002-1-day-2-channel-programmer)

## Best For

- honeywell enthusiasts

## Why This Product

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

## Key Features

- • **Plug & Play Installation:** Industry-standard blackplate compatibility ensures a smooth, hassle-free upgrade without rewiring anxiety.
- • **Brilliant Backlit Display:** Experience the largest ever backlight screen for crystal-clear visibility—even in low light or early mornings.
- • **Smart Seasonal Adjustments:** Automatic Summer/Winter time change means no manual resets—stay perfectly on time year-round without lifting a finger.
- • **Boost & Override Flexibility:** Instantly override schedules or add 1-3 hours of extra heating or hot water—because your comfort shouldn’t wait.
- • **Effortless Dual-Zone Control:** Seamlessly program your central heating and hot water with independent ON/OFF schedules tailored to your lifestyle.

## Overview

The Honeywell ST9400A1002 is a modern 1-day, 2-channel heating programmer designed for precise control of central heating and hot water systems. Featuring the largest backlit display in its class, automatic seasonal time adjustments, and compatibility with standard blackplates, it offers an intuitive user experience with easy installation. Ideal for professionals seeking reliable, energy-efficient home heating management with flexible override and boost options.

## Description

Product Description Your Honeywell ST9400A provides timing control for both your central heating and hot water systems, letting you set ON and OFF periods to suit your own lifestyle. The ST9400A does not directly control the temperature but works together with other temperature controls, such as room thermostats and cylinder thermostats, to control your heating and hot water system in your home. ST9400A has 1-day programming and 2 on/off periods per day. It is simple to use but still allows heating and hot water to be set at different times from each other. Box Contains 1 x ST9400a1002

Review: Central Heating Programmer - Bought this to replace a very old programmer after re- tiling the kitchen. The back plate looked very similar but was sufficiently different that the new one was needed. The wiring was identical and the backplate fitting was the same. I would have fitted the new one anyway, but I know some people are nervous about wires and electricity. Getting the programmer onto the backplate was very fiddly and it took several attempts to get it on. Tightening the 2 x screws underneath was very awkward too, although that was also true of the old unit. This is why I gave 4 stars for "Ease of Install" The unit came with the time and date already set, it had also been programmed, so it was ready to go. When I got around to checking the programming, I found that the pre installed settings were very sensible and similar to what I would nomally use. Changing the settings was delightfully easy. Move the slider to the required position e.g. CH, after a brief pause the display changes to timer input (2 x ON & OFF). After selecting the start time the programmer moves to the end time etc. Same for HW and time/date. This is by far the easiest and most intuitive setup system I have ever seen on this type of device. The display is bright and clear showing the time during normal use. I am very pleased with this purchase.
Review: A Super Boiler Controller - The Honeywell ST9400A1002 is a true two channel controller (Hot Water & Central Heating) which is Mains wired (not 24v as described). If the unit is a replacement for another controller which has a standard wiring backplate, then it can be replaced without the need to touch the wiring (Note: TURN OFF THE ELECTRICS TO THE UNIT BEFORE REPLACING) The unit can be programmed for up to 3 On-Off periods in a day (it comes set up for 2 periods). This is ideal for individuals like pensioners who follow the same pattern of use day after day. I have a Combi boiler, and the Hot Water control is wired into the boiler 'Pre Heat' (Tip: with Pre Heat On opening a hot tap for a couple of seconds signals hot water required - give time for the boiler to heat up the Hot Water heat exchange before running off hot water - saves lots of water and gets you hot water quicker, also if the boiler valve is in the Central Heating position it needs time to change over). I set my Hot Water and Central Heating to come on for a couple of hours in the morning, and again in the late afternoon, the Hot Water goes off early evening, and the Central Heating turned off late in the evening. In the Winter the Central Heating is set to Once a day (the Heating being controlled by the room state) - early morning to late at night, the Hot Water remains on its Auto setting. The unit has independent controls to Override the time switch setting (turn On when Off or Off when On) and also Boost to just give 1 - 3 hours extra On time. I have seen on some reviews that people complained that the clock as comes was 5 minutes slow, and they could not reset it. The clock can be reset easy, the problem is the instruction book fails to mention that the controls to do so are under a simple hinged drop down cover on the front of the unit, then follow the instruction book. This is a great controller, and half the price of a 7 day programable unit, Thank you Honeywell.

## Features

- Largest ever backlight display
- Automatic Summer/Winter time change
- Fits Industry standard blackplate
- Building Regulations compliant
- Backward compatible

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B003DVA5VM |
| Batteries Required? | No |
| Batteries included? | No |
| Best Sellers Rank | 614,937 in DIY & Tools ( See Top 100 in DIY & Tools ) 59 in Home Non-Programmable Thermostats |
| Colour | White |
| Customer Reviews | 4.3 4.3 out of 5 stars (112) |
| Date First Available | 29 Mar. 2010 |
| Display style | backlit |
| Included Components | 1 x Honeywell ST9400A1002 1 Day 2-Channel Programmer |
| Item Package Quantity | 1 |
| Item Weight | 370 g |
| Item model number | ST9400A1002 |
| Manufacturer | Honeywell |
| Measurement System | English/Standard |
| Number of Pieces | 1 |
| Part Number | ST9400A1002 |
| Plug profile | Wall Mount |
| Power Source | Corded Electric |
| Product Dimensions | 15.8 x 11.3 x 5.2 cm; 370 g |
| Special Features | Automatic Summer/Winter time change |
| Style | Modern |
| Usage | Central Heating Control |
| Voltage | 24 |
| Wattage | 10 watts |

## Product Details

- **Brand:** Honeywell
- **Colour:** White
- **Connectivity technology:** Wi-Fi
- **Controller type:** Push Button
- **Included components:** 1 x Honeywell ST9400A1002 1 Day 2-Channel Programmer
- **Power source:** Corded Electric
- **Special feature:** Automatic Summer/Winter time change
- **Specific uses for product:** Central Heating Control
- **Temperature Control Type:** Heating
- **Voltage:** 24

## Images

![Honeywell ST9400A1002 1 Day 2-Channel Programmer - Image 1](https://m.media-amazon.com/images/I/31r28TiaNpL.jpg)
![Honeywell ST9400A1002 1 Day 2-Channel Programmer - Image 2](https://m.media-amazon.com/images/I/51dRa8e0wxL.jpg)

## Questions & Answers

**Q: I have a honeywell st699b which has broken. will this replace it and is it easy to fit?**
A: You could use this timer to replace the ST699B, but it wouldn't fit on the same backplate as the ST699B has a unique backplate that will only fit the ST699B or ST799A.

**Q: Will this fit directly on to a siemens rwb9 backplate without the need to rewrite?thanks**
A: yes it should do as the back plates are very similar .

**Q: Can this be used to replace a select 206 xl?**
A: We can't remember the model it replaced as we've thrown the old one away, but we know it definitely wasn't a 206 xl.   We looked at the official Honeywell website and that gave us the information on which model we should be buying.

**Q: Screen numbers are disappearing .what should i do??bought it one year back.**
A: Have you changed the battery? Off you have then the LCD screen hass just failed!

## Customer Reviews

### ⭐⭐⭐⭐⭐ Central Heating Programmer
*by D***N on 21 September 2019*

Bought this to replace a very old programmer after re- tiling the kitchen. The back plate looked very similar but was sufficiently different that the new one was needed. The wiring was identical and the backplate fitting was the same. I would have fitted the new one anyway, but I know some people are nervous about wires and electricity. Getting the programmer onto the backplate was very fiddly and it took several attempts to get it on. Tightening the 2 x screws underneath was very awkward too, although that was also true of the old unit. This is why I gave 4 stars for "Ease of Install" The unit came with the time and date already set, it had also been programmed, so it was ready to go. When I got around to checking the programming, I found that the pre installed settings were very sensible and similar to what I would nomally use. Changing the settings was delightfully easy. Move the slider to the required position e.g. CH, after a brief pause the display changes to timer input (2 x ON & OFF). After selecting the start time the programmer moves to the end time etc. Same for HW and time/date. This is by far the easiest and most intuitive setup system I have ever seen on this type of device. The display is bright and clear showing the time during normal use. I am very pleased with this purchase.

### ⭐⭐⭐⭐⭐ A Super Boiler Controller
*by M***R on 16 September 2019*

The Honeywell ST9400A1002 is a true two channel controller (Hot Water & Central Heating) which is Mains wired (not 24v as described). If the unit is a replacement for another controller which has a standard wiring backplate, then it can be replaced without the need to touch the wiring (Note: TURN OFF THE ELECTRICS TO THE UNIT BEFORE REPLACING) The unit can be programmed for up to 3 On-Off periods in a day (it comes set up for 2 periods). This is ideal for individuals like pensioners who follow the same pattern of use day after day. I have a Combi boiler, and the Hot Water control is wired into the boiler 'Pre Heat' (Tip: with Pre Heat On opening a hot tap for a couple of seconds signals hot water required - give time for the boiler to heat up the Hot Water heat exchange before running off hot water - saves lots of water and gets you hot water quicker, also if the boiler valve is in the Central Heating position it needs time to change over). I set my Hot Water and Central Heating to come on for a couple of hours in the morning, and again in the late afternoon, the Hot Water goes off early evening, and the Central Heating turned off late in the evening. In the Winter the Central Heating is set to Once a day (the Heating being controlled by the room state) - early morning to late at night, the Hot Water remains on its Auto setting. The unit has independent controls to Override the time switch setting (turn On when Off or Off when On) and also Boost to just give 1 - 3 hours extra On time. I have seen on some reviews that people complained that the clock as comes was 5 minutes slow, and they could not reset it. The clock can be reset easy, the problem is the instruction book fails to mention that the controls to do so are under a simple hinged drop down cover on the front of the unit, then follow the instruction book. This is a great controller, and half the price of a 7 day programable unit, Thank you Honeywell.

### ⭐⭐⭐⭐⭐ Easy to use
*by C***. on 25 February 2020*

Works really well and easily. If you don't need different timings on different days of the week then this is for you. Took a bit of time to work out how to remove the previous model but this fits on to the same backplate.

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*Product available on Desertcart Ireland*
*Store origin: IE*
*Last updated: 2026-01-28*