• Direct replacement for Honeywell ST9400C with no wiring changes - Simply clip onto the ST9400C backplate
• Can also replace Honeywell ST699 ST799 ST7100 ST6200 ST6300 ST6400 with simple wiring change to the backplate
• 7 day 2 channel programmer for heating and hot water with 3 on/off periods per day
• Made and supported by Honeywell - direct telephone technical support
• Factory pre-programmed scheduling options with 3 independent heating and hot water periods per day, and 7 days programming including holiday, party and boost mode
• The program schedules can be set independently for central heating and stored domestic hot water

Made and supported by Honeywell, this unit is a direct replacement for the Honeywell ST9400C, it uses an industry standard wiring back box. Simple detach the old ST9400C from its backplate and clip in the 7 Day 2 Channel programmer. No additional wiring is required. The Honeywell ST699 and ST799 can also be updated using this unit for a fraction of the cost of trying to replace with discontinued old models with a simple wiring change.

Features include:- On/Off boiler control, hot water control, 7 day / 3 periods programmable, holiday mode, daylight saving time, backlit display and mains powered