Honeywell ST799A1003 7Day Programmer by Honeywell from Heat Group Supplies

Honeywell ST799A1003 7Day Programmer



  • £109.81 including VAT
  • £91.51 excluding VAT
In Stock - Order before 4pm Monday to Friday for next working day delivery
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Delivery from £7.50 for orders under £50. See our delivery page for more info.

The ST799 time control programmer can be used as a replacement programmer on gravity, primary or fully pumped systems. The ST799 offers a flexible 7 day programme. The front panel of the programmer will fit to the same backplate.

Programming the timing sequence is straightforward, using the top slider switch and [+] and [-] buttons. Please note it is recommended that, in order to comply with Part L1 Building Regulations central heating systems should be upgraded to fully pumped with a fully independent programmer e.g. ST9400C.


  • Compact size, easy to operate
  • Suitable for surface or switch box mounting
  • Built-in battery back-up
  • One or two On/Off periods per day
  • Double insulated

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