Honeywell Digital Timer ST9400 Part No: G00026BXX, R4178

• The Honeywell ST9400C provides timing control for both your central heating and hot water systems, letting you set ON and OFF periods to suit your own lifestyle.
• The programmer does not directly control the temperature but works together with other temperature controls, such as room thermostats and cylinder thermostats, to control your heating and hot water system in your home.
• With 7-day programming and up to 3 on/off periods per day, every day can be set.

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