Honeywell 1 Day 2 Channel Programmer ST9400A

£56.35 Excl. VAT £67.62 Incl. VAT Best Buy

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The Honeywell ST9400A is a 1-day twin channel programmer designed for independent control of heating and hot water in complete systems, enabling maximum energy efficiency. It can be used for combi boilers, heating zones or any application where small electric loads need switching. It can also be set as a mini programmer for older gravity circulation stored hot water systems without an interlocking control valve.

  • Fully compliant with Building Regulations Part L1 for England & Wales and Part J for Scotland

  • Large backlit Line of Text (LoT) display for helpful text feedback

  • Factory-set clock and date

  • Automatic summer/winter adjustment

  • Choice of 3 different built-in programmes

  • +1 facility for up to 3 hours boost or programme extension

  • Up to 3 ON/OFF times per day

  • Holiday button

  • Superseded the ST6400A
Boiler Accessories
Boiler Controls
Honeywell Controls Ltd
Manufacturer Product Number
Manufacturers Warranty
1 Year (Subject to Manufacturers T&C's)
Type of control
Connection type

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