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  1. J

    Setting or adjusting a Horstmann Astral Clock

    A friend of mine has an old mechanical Horstmann Astral stair lighting timer. It has managed to get completely out of whack in both times and month. Anyone know how to adjust or reset one of these clocks? Can’t find any instructions other than “don’t mess with these things, live electricity...
  2. S

    Horstmann teleswitch connections

    hi guys Not had much experience in connecting to these meters, the setup originally was they had obviously a live and neutral on the outgoing side of the meter to Henley blocks, then outgoing to consumer unit. There was then a single black connected in no9 on the teleswitch which connected into...
  3. L

    Horstmann 425 Coronet wiring question

    I've just fitted a Horstmann 425 Coronet to control an immersion heater. All it's doing is turning the immersion heater on and off a couple of times a day, so a very simple arrangement. I've attached a photo of how I've wired it in and I believe it's correct, but I just wanted someone to confirm...
  4. X

    Electrician Jobs immersion heater not working in Barking

    My boiler isn't heating up water overnight like it should. I have horstmann economy 7 quartz. The timer light doesn't turn on. Boost is working but it takes a long time to heat up the water. Is it my thermostat that needs replacing?
  5. N

    Horstmann timer on/off switches?

    Hi All- We are having some issues and think our electric brick heaters might be coming on during the day and causing our electric bill to be sky high. Can anyone tell us how to remove the extra ON OFF switches on this Horstmann timer pictured below? I have arrows pointing to the ones we want to...
  6. polo1

    Horstmann Electronic 7

    Think I’m missing something here. Have been asked to remove a Horstmann E7 BX and replace with an Electronic 7. The existing set up is two immersion elements (top & bottom) in one cylinder, 24hr top and O/P bottom Now, the BX has connections for both the incoming off peak and 24hr supplies...
  7. J

    Understanding economy 7

    Economy 7 horstmann quartz timeclocks for water heaters with dual elements, from my understanding they would require two separate supplies to work on a off peak supply and regular supply, although after looking inside one today and looking at diagrams only 1 supply is used. How is this possible?
  8. M

    Keeping Horstmann 7 on all day?

    Hi all, I have zero experience with boilers and timers so hoping I can clear up some confusion. I have a Horstmann Electronic 7 with a simple digital interface controlling a Heatrae Sadia megaflo tank. I need hot water at irregular and different times of the day throughout the week. I can set it...
  9. F

    Horstmann Radio Teleswitch

    Hi all, Just a question to see if anyone knows what the blue and orange button do on the radio teleswitch? Changed over storage heaters to new ones, like for like swap and they have failed to come on during the night. Connections fine, fuses fine. It leads me back to this radio teleswitch and...
  10. 123

    Centaurplus Horstmann C21 & C27 Programmer Instructions

    123 submitted a new resource: Horstmann C21 & C27 Programmer - Horstmann C21 & C27 Programmer Read more about this resource...
  11. U

    horstmann electronic 7 not heating water when set up to do so

    Hi, I got my boiler control changed last week as the old one stopped working. The current one doesn't seem to be heating the water when I set it a range of times. It does heat the water when the BOOST button is on, but that's not enough for me. I believe I have an immersion heater and I am not...
  12. J

    Verifying/confirmation if Horstmann Economy7 Timeswitch needs replacing.

    Hope I've got the right section of the forum for this question (please redirect me if not). I'm looking at a Horstmann Economy 7 timeswitch which appears to need replacing. However the timer (24 section is still turning) and the boost timer winds itself down properly, so the timer parts of...
  13. A

    Horstmann Economy 7 Quartz Water Heater - Help?

    Hi, I've recently moved into an apartment which has a hostmann economy 7 quartz water heater. Since moving in, it appears that I can't get the timer function to work properly. The water only heats using the boost option. The timer itself seems to be working fine, I can hear it ticking and see...
  14. cianomahony

    Horstmann Economy 7 Quartz troubles

    Hey there, I just moved into an apartment and we have a water heater control panel. It seems to heat the water during the night for a full seven hours. I do not need this much time at all, and frankly if I could just get it to come on for 2-3 hours from say 4 or 5 am that would be perfect. I...
  15. B

    horstmann 80A timer for storage heater circuit

    Just looked at a domestic call out. Storage heaters have stopped working. Next to the consumer unit is a Horstmann 80A timer clock, you know the typical steam punk Bakelite. This looks burnt out. Any recommendations for a replacement. Not familiar with this type of circuit arrangement.
  16. A

    horstmann economy 7 timer not working

    hi, yesterday I just noticed my horstmann economy 7 timer not working... I tried the boost (1 hour) button, it still can light up on the indicator and heat up the water tank. However, when I used the Timed dial to set the time, I turned the dial a whole circle it won't heat up the water also...
  17. M

    Horstmann quartz economy 7 water heater problems

    Hi all, am new here. Would like some advice before contacting an electrician (again) We have an e7 meter, we have had a new immerser fitted and a new electricity meter. The off peak was showing constantly and the only way to put boost on was to change the time to about 5am then change it back...
  18. V

    Sangamo M5 to Horstmann C27 Problem.

    Hi Everyone. Changing Sangamo M5 timeclock to Horstmann C27. Horstmann C27 can be used on fully pumped or gravity fed systems. Image attached, if I attached it correctly haha. Easy enough. TERMINAL 8 on Sangamo to TERMINAL 4 on C27 (Heating on) TERMINAL 1 on Sangamo to TERMINAL 3 on...
  19. X

    Need help, setting horstmann economy 7 - it's just not working

    Hi guys, First thank you for reading and helping out. Ok I got the above water timer, since last week it's just doesn't seem to be working. First off i set the time as per current time, i set the time as "summer." but it just doesn't seem to heating up the water and importantly it doesn't...
  20. A

    Horstmann Economy 7 Quartz Time Switch problem

    Hi, I have a Horstmann Economy 7 Quartz Timer switch which controls the heating of the water tank. There are 2 pre-set times on the timer, and a boost facility. However, one of the preset times has stopped working - but the other works fine. Any suggestions please? Many thanks in advance...

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