horstmann

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  1. H

    Horstmann electronic 7 only heating water using boost not timed off peak....

    The unit only heats water using the programmed boost and when pressed in the 1 2 or Cont boost function. I have checked the off-peak time which is set to 2.30-7.30 am - this is when the Horstmann should do its thing...? But it's not heating the water so only the top cylinder works on boost, the...
  2. Lou

    Horstmann Economy 7 Quartz Water Heater Instruction Manual 2024-03-27

    Download the Horstmann Economy 7 Quartz Water Heater Instruction Manual for free here.
  3. P

    Horstmann Water heater controller for Economy 7

    Yesterday moved my Mum into her new bungalow. The Hortsmann had been off for a few months I suspect. The boost worked, but nothing happened overnight on economy 7 even though I set the timer dial correctlt etc, so no hot water this morning. I can't see anywhere in the threads on here whether...
  4. B

    horstmann h37xl series 2 stuck in gravity mode

    horstmann h37xl series 2 stuck in gravity mode, looks like there should be a rear plug to change it to pumped mode? or can i buy one ?
  5. D

    Query about Horstmann C-stat room sensor

    Hi there I’m new here and hoping I’m posting in the right place. I am a homeowner with little electrical or heating knowledge. I have a room sensor connected to the heating system which controls the radiators in the house. This one has something like an error on it which I don’t know how to...
  6. C

    Horstmann Electronic 7 - No hot water, no LED indicator

    Hi all, I've come back from a 5 day holiday to no hot water, and the Horstman Electronic 7 controller on (LCD display working) but the neon indicator does not turn on during off-peak hours or when the boost button is pressed. It's looking like it's going to be a couple weeks until I'm able to...
  7. E

    Horstmann Economy 7 Quartz Heater Help!

    Hello, Apologies if this type of question has been asked before. I have no gas in my house so rely on a water heater to heat the water tank. The water heater is a Horstmann Economy 7 quartz model. I have found the pdf manual online that vaguely describes how to change the timings the heater is...
  8. K

    Horstmann Electric 7 only works with boost

    Hi all, any suggestions, as my Horstmann only works when boost is switch on, even though an electrician has checked it two times! I do believe the settings are correct, any suggestions as to why this might be? Should the 'timed boost' have the black arrow there when the red button is on also...
  9. R

    Horstmann Electronic 7 Water Heater - not working

    Hi all, Yesterday I returned home to no hot water after a few days away. After a brief inspection it seems the fault lies with the Horstmann Electronic 7 Water Heater. The display is still visible but the controller is completely unresponsive. If I select either of the following buttons...
  10. C

    Horstmann Electronic 7

    I have the above control which 99% of the time works fine. Occasionally I wake up and the powe has gone in the night with the result of no hot water. Switch the master switch off at the fuse board and leave for 5mins before switching back on. Reset the clock and then Boost to get some water, all...
  11. hodge228

    horstmann electronic 7 power/display issue

    Hi All, I have been having an odd issue with My Horstmann Electronic 7. It had been working normally and then I found that the display had turned off (seemed like no power). This is despite the mains being on. When switching the main switch off, the display then comes back, albeit with no power...
  12. P

    Question about Electronic 7 Horstmann

    Hi everyone! I just moved a new flat last week and this is my first time using boiler heater. And I am confused with the use of that timer. I have never looked into it until hot water running out yesterday. After pressing 'BOOST' (Pic 1), I got the hot water after awhile. In the next day, when...
  13. Diocm7

    Water 7 Horstmann Clock

    Hello , I recently moved to a flat with a old model of this water timer installed. I dont know if the clock is set up correctly and dont understand what time should I put in the winter time/summer time. Can someone clarify it for me? Also since the clock does not rotate but in the manual says...
  14. J

    Settings needed for Horstmann Electric 7 boiler for best use for 1 person, without economy 7 tarif.

    I have been living in my two bed apartment alone for three years and can never get the settings on my horstmann boiler so that I have enough hot water. I don't work so I'm at home 24/7 and use more than the average one person's consumption of hot water, I like to take a bath daily and do lots...
  15. C

    Horstmann Economy 7 Quartz heater always 'on' - doesn't turn off according to pre-set times on clock

    Hi all, I have quite an old Horstmann Economy 7 Quartz water heating system in my flat (installed around 2007). It's been working fine until the last month, now the water heater always seems to be 'on'. The clock is set to the correct time, and even when it is the middle of the day when the...
  16. Mcharles

    Can i keep hortsman 7 on 24hours to have constant hotwater?

    Can i keep hortsman 7 on 24hours to have constandt hot water and will that spike my bills or will that be ok since its top up and not heating all tank?how do i make it heatup 24hours as it only heat water between 2 am and 8 am . So if i finsh hot water during day, i have to wait till next day...
  17. T

    Horstmann Economy 7 Quartz Timer Inverted

    Hi, we have this device in our home and looks like the timer is messed up. It looks like the timer led is on when not in off-peak hours. I debugged this by just rotating the time dial and the timer led turns off for that 4-5 hours period and the rest of the day when I am turning it is on, so...
  18. Ap1234

    Ireland Horstmann Centaurstat 7 Room Thermostats and Heating Programmers

    Hi, I want to either replace or add a thermostat to my Heating Programmer which only has basic functions of On/Off, Timer and Boost.. Can a thermostat be connected to the programmer wiring or do I have to replace the programmer entirely with the thermostat and if so, is the wiring that’s...
  19. J

    UK Horstmann Electronic 7 only working with boost, not timer

    Hi, We have just moved into a new flat with the old Horstmann electronic 7 timer for our immersion boiler. We just moved from a flat with the exact same system and never had any issues. We have set the timer and the times for the off peak boiling and have had no hot water for 3 days. The boiler...
  20. C

    Horstmann Control 37

    Good evening to All, Hope all is well. What I would like to know is if possible to run all 3 channels at once, on same timings. Heat upstairs, Heat downstairs and water heater. It's a sealed system, pressurised. Unvented tank, 180 litres. At the moment, water comes on, heat upstairs comes on...

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