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central heating programmer

  1. D

    How to connect Honeywell to replace Horstmann programmer (Ed.)

    Hi all - bit of issue on Christmas Eve My Horstmann channel plus model H27 has stopped working. I have been able to source a Holywell ST9400A this morning. The Horstmann has following cables connected in Clip position 5 black cable Clip position 4 cable black cable Clip position 2 cable 2...
  2. Hamish McTavish

    Replacing a Danfoss FP715Si (TP9000) 2-channel CH/HW programmer

    Hi all, I currently have installed a Danfoss FP715Si (TP9000) 2-channel CH/HW programmer, but the factory-set clock is entirely wrong and it is just getting old. So it is time to replace it with something more modern. Ideally, I would like to be able to replace it with something that can reuse...
    • Hamish McTavish
    • Thread
    • 2-channel ch/hw programmer central heating controller central heating programmer danfoss fp715si hot water controller hot water programmer tp9000 wiring
    • Replies: 23
    • Forum: Electrics UK
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