--- product_id: 48345105 title: "Honeywell ST9400C Programmer. 7, 2-Channel, 3 on/Off per Day, 24 V, White - Bulk Package" brand: "honeywell" price: "€ 192.44" currency: EUR in_stock: true category: "Honeywell" url: https://www.desertcart.it/products/48345105-honeywell-st9400c-programmer-7-2-channel-3-on-off-per store_origin: IT region: Italy --- # 24V power for reliable control Largest ever backlit LCD display 7-day programmable precision Honeywell ST9400C Programmer. 7, 2-Channel, 3 on/Off per Day, 24 V, White - Bulk Package **Brand:** honeywell **Price:** € 192.44 **Availability:** ✅ In Stock ## Summary > 🔥 Stay cozy, stay smart — control your comfort like a pro! 🏡 ## Quick Answers - **What is this?** Honeywell ST9400C Programmer. 7, 2-Channel, 3 on/Off per Day, 24 V, White - Bulk Package by honeywell - **How much does it cost?** € 192.44 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.it](https://www.desertcart.it/products/48345105-honeywell-st9400c-programmer-7-2-channel-3-on-off-per) ## 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 - • **Smart Home Ready:** Wi-Fi connectivity enables integration with other Honeywell smart controls for a fully automated heating system. - • **Plug & Play Upgrade:** Direct replacement for Honeywell ST6400 models with no rewiring needed—upgrade hassle-free. - • **See Clearly, Control Easily:** Our largest backlit LCD display ensures effortless visibility and intuitive touch control, even in low light. - • **Master Your Heating Schedule:** 7-day, 2-channel programming with 3 on/off cycles per day for ultimate customization. - • **Seamless Seasonal Adjustments:** Automatic summer/winter time change means no manual resets—comfort that adapts with you. ## Overview The Honeywell ST9400C Programmer is a cutting-edge 7-day, 2-channel heating controller featuring the largest backlit LCD display in its class, automatic seasonal time adjustments, and Wi-Fi connectivity. Designed as a direct, no-rewire replacement for previous Honeywell models, it offers precise, customizable heating schedules with up to 3 on/off cycles per day, making it the smart choice for modern, energy-conscious homes. ## Description Product Description The ST9400C in a 7-day Electronic Programmer which provides accurate time control for central heating systems with separate programmes for heating and hot water. ST9400C is suitable for replacing a wide range of programmers on the market and is a direct replacement for Honeywell ST6400 Programmers without the need for re-wiringThis Version replaces some of the following previous Honeywell Models: ST6400C1003 ST6400C1052.St9400 programmers can be combined with other Honeywell Controls such as Room Thermostats, Cylinder Thermostats, Wiring Centres and Zone or Diverting Valves to form a fully automatic central heating control system.Legal DisclaimerAny circuit boards cannot be returned if seal has been broken as incorrect diagnostics could cause damage to these parts. Legal Disclaimer Please check your local laws before purchasing this product. All manufacturers Terms and Conditions apply. Please see Manufacture of product website for full details before buying. PLEASE READ AND FOLLOW ALL INSTRUCTIONS. P.when('A').execute(function(A) { A.on('a:expander:toggle_description:toggle:collapse', function(data) { window.scroll(0, data.expander.$expander[0].offsetTop-100); }); }); Box Contains 1 x ST9400C1000 Programmers See more ## Features - Now with LoT Technology - Our Largest ever Backlight Display - Factory set Clock - Automatic Summer/Winter time change - 7 Day or 5/2 Day operation - Product may comes in white box or plastic package ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B003DV6ACA | | Backlight | Yes | | Best Sellers Rank | 17,254 in DIY & Tools ( See Top 100 in DIY & Tools ) 1,143 in Heating & Cooling | | Brand Name | Honeywell | | Colour | White | | Connectivity Protocol | Wi-Fi | | Connectivity Technology | Wi-Fi | | Control Method | Touch | | Control Type | Button Control | | Controller Type | Push Button | | Country Of Origin | United Kingdom | | Customer Reviews | 4.5 4.5 out of 5 stars (871) | | Display Type | LCD or LED with backlight | | Finish Type | Matte | | Global Trade Identification Number | 05025121388412 | | Included Components | 2 unknown batteries | | Item Dimensions D x W x H | 35D x 145W x 99H centimetres | | Item Shape | Rectangular | | Item Type Name | Programmer. 7 day, 2-channel, 3 on/off per day | | Item Weight | 290 Grams | | Manufacturer | Honeywell | | Manufacturer Part Number | ST9400C | | Material Type | Plastic | | Model Name | ST9400C | | Model Number | ST9400C | | Mounting Type | Wall Mount | | Number of Batteries | 2 Unknown batteries required. | | Number of Items | 1 | | Power Source | Corded Electric | | Product Style | Modern | | Special Features | Programmable | | Specific Uses For Product | Indoor use only | | Specification Met | 2006/95EC and 2004/108/EC | | Temperature Control Type | Digital | | UPC | 772040469917 | | Unit Count | 1.0 count | | Voltage | 24 | ## Product Details - **Brand:** Honeywell - **Colour:** White - **Connectivity technology:** Wi-Fi - **Controller type:** Push Button - **Included components:** 2 unknown batteries - **Model name:** ST9400C - **Product dimensions:** 35D x 145W x 99H centimetres - **Special feature:** Programmable - **Specific uses for product:** Indoor use only - **Temperature Control Type:** Digital ## Images ![Honeywell ST9400C Programmer. 7, 2-Channel, 3 on/Off per Day, 24 V, White - Bulk Package - Image 1](https://m.media-amazon.com/images/I/51OIxwl6IlL.jpg) ![Honeywell ST9400C Programmer. 7, 2-Channel, 3 on/Off per Day, 24 V, White - Bulk Package - Image 2](https://m.media-amazon.com/images/I/41aTXyyn7zL.jpg) ![Honeywell ST9400C Programmer. 7, 2-Channel, 3 on/Off per Day, 24 V, White - Bulk Package - Image 3](https://m.media-amazon.com/images/I/31-vF2HkoKL.jpg) ## Questions & Answers **Q: will this replace a honewell st6400c programer ??** A: I had a ST6400C an I purchased this item and it fitted exactly. There are two screws at the base and when the ST6400C was removed the replacement fitted in its place. I was given the information initially by my service engineer **Q: The description says: "now with lot technology". (that's capital l and capital t, but this site changes them to small l t!) what is lot technology?** A: LoT means "Line of Text" and refers to the programmer display in response to any button pressed or slider moved. It enables an installer or user to set the programmer without needing to refer to a manual. **Q: I presume this is hard wired to the boiler. Where can I get a wireless version of it?** A: Sorry try the Honeyline technical help email they were v helpful **Q: Dose this controller replace the potterton 2002** A: Yes, the Honeywell ST9400c is logically similar to the Potterton 2002, so could be used as a replacement. However you will need to replace the backplate (fixed to your wall) and the order of the wires will change ~ this should not be a problem for your electrician ~ if you intend to replace the backplate yourself make sure you connect the wires to the correct terminals. The ST9400C comes complete with a new backplate. ## Frequently Bought Together - HONEYWELL ST9400C Thermostat Programmer. 7, 2-Channel, 3 on/Off per Day, 24 V, White, 1 - Honeywell T6360B1028 Room Thermostat, 230/240V, White, 1 - Honeywell L641A1039 Cylinder Stat, 230 V --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.it/products/48345105-honeywell-st9400c-programmer-7-2-channel-3-on-off-per](https://www.desertcart.it/products/48345105-honeywell-st9400c-programmer-7-2-channel-3-on-off-per) --- *Product available on Desertcart Italy* *Store origin: IT* *Last updated: 2026-08-20*