Description

Reliable & Precise 2-Channel Central Heating Control

The Honeywell Home 2-Channel Digital Programmer (ST9400C) is an essential component for any sustainable UK heating system. At ECO Heat Shop, we focus on hardware that gives you total control over your energy consumption. By separating your heating and hot water schedules, this programmer ensures your boiler only fires when necessary, significantly reducing fuel waste.

Designed as a direct replacement for the older Honeywell ST6400 range, this unit mounts onto the industry-standard backplate, making it a favorite for DIY enthusiasts and trade professionals alike. Whether you have a system boiler or a regular boiler with a hot water cylinder, this 2-zone programmer is the key to a smarter home.

Advanced Features for Modern Efficiency

• LoT™ (Line of Text) Technology: Clear, plain-English on-screen instructions guide you through programming without needing a manual.
• 7-Day Flexibility: Program every day of the week differently or use the 5/2-day setting for consistent weekday/weekend routines.
• Automatic BST/GMT Change: No more manual clock adjustments; the unit handles the UK summer and winter time changes automatically.
• Holiday Mode: Reduces your heating to a minimum “frost protection” level while you are away, protecting your plumbing and saving money.

Technical Specifications

• Power Supply: 230V AC, 50Hz.
• Switch Rating: 3(3)A resistive/inductive.
• Memory: Non-volatile memory (NVRAM) keeps your settings stored indefinitely, even during power cuts.
• Installation: Suitable for surface or flush switch box mounting; 2-wire installation.
• Compatibility: Ideal for Pumped or Gravity-fed systems.

Why Choose ECO Heat Shop for Your Honeywell Spares?

As a specialist UK hardware store (Company No: 16383897), we prioritize “Repair over Replace.” Upgrading your boiler programmer is a cost-effective way to improve your EPC rating and lower your carbon footprint without the expense of a full system overhaul. We provide genuine Honeywell parts with fast UK shipping.

Expert Tip: For maximum energy savings, pair this 2-channel programmer with a cylinder thermostat and room thermostat to create a “Boiler Interlock.” This ensures the boiler shuts off completely when your home reaches the desired temperature.

Registered in the UK. ECO Heat Shop provides expert guidance on sustainable heating and renewable energy components for residential and commercial properties.

Additional information