OPENBOX - 7-Day Heating Timer – Replaces Honeywell Thermostat ST9100C, ST9100A, ST6100, ST7100

Product description

• OPEN BOX: This product is a fully inspected customer return
• Replaces Honeywell ST9100C, ST9100A, ST6100, ST7100: Designed to replace these Honeywell timers. Clips onto the same 6-terminal Honeywell backplate. No rewiring needed in compatible systems.
• 3 On/Off periods with flexible scheduling: Program up to three heating cycles per day. Choose from 24-hour, 5/2-day or full 7-day schedules. Ideal for combi boilers and single heating zones.
• Boost, Override and Holiday Modes: Boost adds up to 3 hours of heat. Holiday Mode pauses heating for up to 99 days. Manual Override lets you switch heating on/off until next event.
• Backlit LCD screen with clear prompts: Text-based display shows current status, next event and menu guidance. Simple layout makes setup quick and easy for any user.
• Memory is built in: Settings are stored permanently, even during power cuts. Clock auto-adjusts for summer/winter time changes.
• Made by Resideo (Honeywell brand group): Built by the makers of Honeywell Home controls. Installer-trusted and backed by a 3-year warranty. Reliable, affordable, UK-compatible.

PLEASE NOTE: This item is a customer return that has been fully inspected by the Lava team and carries a 30 day Lava guarantee or the manufacturer's original warranty (if applicable) - whichever is longer.

The LavaTap Pro Controls 7-Day / 1-Channel Digital Timer is a reliable, user-friendly solution for replacing older Honeywell heating controllers. Designed specifically to fit the same 6-terminal backplate as the Honeywell ST9100C, ST9100A, ST6100A / C, and ST7100, it clips directly into place without the need for rewiring. This makes it the ideal drop-in replacement for homes already equipped with these legacy systems. Once installed, the timer allows full customisation of your heating schedule with up to three ON / OFF cycles per day. It supports 24-hour, 5 / 2-day and full 7-day programming formats, offering flexibility for everyday routines. Commonly used with combi boilers and single-zone heating setups, this programmer is trusted by landlords, engineers, and homeowners for its simplicity and reliability. The large backlit display features a clear, text-based interface that guides users through setup and shows live system status. Features such as Boost Mode, Manual Override, and Holiday Mode provide real-world convenience for modern households. All settings are retained even during power cuts thanks to the built-in memory, and the internal clock adjusts automatically for daylight saving time. Built by Resideo, the same manufacturer behind Honeywell Home, the LavaTap Pro Controls timer delivers long-lasting performance and ease of use at an affordable price. It is backed by a 3-year warranty and is engineered to meet the demands of UK heating systems with quick, stress-free installation. Note: This unit is only compatible with Honeywell ST-series backplates. It is not suitable for use with other brands like Drayton, Horstmann, or ESI unless rewired.