Upgrade your home’s heating control with the Honeywell ST9400C 7-Day 2-Channel Programmer — one of the most trusted and easy-to-use heating timers in the UK. This dual-channel controller gives you independent control over heating and hot water, helping you run your system more efficiently and reduce energy costs.

With its large clear display, intuitive buttons, and installer-friendly wiring layout, the ST9400C is perfect whether you’re updating an older Honeywell programmer or installing a brand-new system. You can set up to three separate heating and hot-water periods each day, letting you heat your home only when you need it.

Designed for reliability and long-lasting performance, this Honeywell programmer is a proven favourite with installers and homeowners alike. If you want dependable heating control with simple operation and flexible scheduling, the ST9400C is an excellent choice. Order today for fast UK delivery.

Key Features

• ✔ Independent 2-channel control for heating and hot water

• ✔ Fully programmable 7-day schedule

• ✔ Up to 3 ON/OFF periods per day for each channel

• ✔ Large, clear backlit display for easy reading

• ✔ Holiday mode + temporary override without losing settings

• ✔ Non-volatile memory – keeps all settings even during power cuts

• ✔ Installer-friendly wiring design for quick replacement

• ✔ Ideal for replacing older Honeywell time switches

• ✔ Reliable Honeywell engineering for long-term performance

• ✔ Fast UK delivery available

Model: Honeywell Home ST9400C
Channels: 2 (Heating & Hot Water)
Programming Type: 7-Day independent scheduling
Daily Time Periods: Up to 3 ON/OFF periods per channel
Display: Large backlit LCD
Mounting: Wall-mounted
Power Supply: 230V AC, 50Hz
Switch Rating: 230V AC, 3A resistive, 1A inductive
Backup Memory: Non-volatile memory (no batteries required)
Dimensions: Approx. 150 mm (W) × 93 mm (H) × 34 mm (D)
System Compatibility:

• Fully pumped heating systems

• Zoned heating systems

• Suitable replacement for Honeywell ST699, ST6400, and similar programmers
  Certifications: CE approved
  Brand: Honeywell Home