Key Features:
- Large backlit LCD display — clear text guidance simplifies everyday programming
- Automatic summer/winter time change — keeps schedules accurate year-round
- Factory-set time and date — faster installation with minimal setup required
- Flexible programming options — choose three built-in programmes with overrides
- Programme indicator lights — instantly see which heating mode is active
- Industry standard back plate — direct replacement for older ST6100 models
- 1-year guarantee
What’s Included
The Honeywell ST9100C 7-Day Single-Channel Programmer provides simple, dependable control of your heating or combi boiler system. Designed with both homeowners and installers in mind, it offers flexible scheduling, clear on-screen instructions and reliable performance. With up to three on/off periods per day, built-in programmes and easy override options, it helps manage comfort while reducing unnecessary energy use. Ideal as a direct replacement for older models, it’s a practical upgrade for efficient heating control. Choose Honeywell for straightforward, trusted heating management.
Clear Digital Display
The large backlit LCD screen uses plain English text to guide you through programming and adjustments, making it easy to use without constantly referring to instructions.
Flexible 7-Day Programming
Set up to three on and off times per day, with the option to choose 7-day, 5/2-day or 1-day schedules. This flexibility makes it simple to tailor heating around your routine.
Fully Customisable Heating Control
Multiple built-in programmes allow you to fine-tune how and when your heating operates, helping improve comfort while keeping energy use under control.
Override and Boost Functions
Temporary and permanent override options let you adjust heating instantly when plans change. The extra hour facility provides up to three hours of additional heating when needed.
Holiday Mode
The dedicated Holiday function allows you to turn heating off for a set number of days while you’re away, automatically resuming normal operation when you return.
Flexible Switching Compatibility
The Honeywell ST9100C is suitable for mains voltage, low voltage, or potential-free switching, making it compatible with a wide range of boilers and heating systems.
Automatic Summer & Winter Time Adjustment
An integrated automatic clock update adjusts for summer and winter time changes, ensuring your heating programme stays accurate throughout the year without manual intervention.
Non-Volatile Memory Backup
All programmed settings are stored in non-volatile memory, so your schedules are retained indefinitely, even in the event of a power interruption.
Clear Programme Indicator Lights
Built-in programme indicator lights clearly show which heating schedule is currently active, allowing you to check system status at a glance.
Installer-Friendly Design
Designed to fit an industry-standard back plate, the ST9100C is a direct replacement for older ST6100 models, making installation quick and hassle-free.
