central heating

central heating

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  1. Yellowhammer

    Intermittent central heating fault..

    Hi, I've recently looked at a fault with an intermittently tripping RCD at a property for a landlord I do the odd job for. Got there and did the basics, IR'd the cables, looked at resistances across the pump, got acceptable results everywhere I looked. Played with the heating, demanded hot...
  2. P

    S-Plan central heating - bypass microswitch?

    I have Drayton motorised valves for my central Heating and hot water in an S Plan configuration. However, I have had several failures of the microswitches in these valve where they've not switched off and so left the pump and boiler running. This leads to the boiler over heating and so tripping...
  3. Rod1971

    Central Heating Boiler and Treadmill tripping MCB/RCD

    Good evening, I have recently moved into a new home and I am having problems with the MCB/RCD tripping (Mem M6 Type 3 - 30mA). It intermittently trips when I switch on the Central Heating on and sometimes after running the heating for a couple of hours. The heating is gravity fed, hot water...
  4. A

    Central heating thermostat

    Hi all, my condenser boiler central heating has started to do strange things so I set about trying to diagnose the problem. When I got to the thermostat I found that there was no power to it, could anybody tell me where this is powered from please? It is an old system, almost 30 years old so in...
  5. D

    Hive mini with Remeha avanta exclusive - please help

    Hello, I'm in the process of changing my wired remeha thermostat with the wireless hive mini, I've had a look at the manual and believe I have installed this correctly however the thermostat doesn't seem to be talking to the boiler and I can't control my heating through it. Could you please...
  6. D

    Central heating fault.

    So a customer changed his own stat and wired it wrong and blew 3/4 fuses. Then heating was stuck on so I changed the programmer and this resolved the problem so I think the short circuit had damaged programmer. Now 5 days later the the hot water isn’t heating haven’t been yet. All I can guess...
  7. MissingBeeGee

    UK Lights wired into central heating circuit ? Is this safe ?

    I recently moved into a flat to find that my top floor main light is wired into central heating circuit, along with bathroom towel rail . As a result the light only works if the immersion heater , boost or central heating is on ! Aside from being ridiculous and extremely inconvenient in summer...
  8. Alan-N

    Gabarron Electric Central Heating boiler CMX15

    Got called to look at a Gabarron CMX15 that was dead, discovered the Safety Limiter device on the CH side had tripped, reset it and bled the radiators are recharged to 1.5bar per the manual. long story short it has tripped a couple of times since. Done it today while I was there after only being...
  9. Gary Tollison

    Central heating queries: is this safe?

  10. sargentbash

    central heating or electric heating?

    Hi all, I have a quick question. I live in a ground floor 1 bed flat. The building is pretty old, the wall on the front/right side & back is brick , no insulation what so ever. I have 1 large radiator in the open plan kitchen/living room and 1 radiator in the bedroom, I also have a hive smart...
  11. S

    Solar Panels Best option for central heating & hot water w solar PV installation

    Hello, I am looking at getting a solar PV installation (8 x 350W plus 4.6 kWh battery) and wondered how I might best take advantage of it when re-designing the central heating system, with the aim of reducing natural gas usage without spending more money on electricity from the grid. This is...
  12. R

    Horstmann Thermostat

    Hello all, I just moved in to a new flat and it came with this beauty. I have absolutely no idea how to operate it, though and there’s no manual anywhere to be found. The boiler is placed behind a bed so it’s not easy to access on a daily basis. I think I can programme it if I spend enough time...
  13. E

    Central heating pump on continuous

    Hi I have just had my boiler replaced which was a potterton suprima 60l. Heat only boiler as it kept cutting out. I have had a vailent ecofit 425 fitted by engineer but now my pump is running continuously. This wasn't the case before. It's s plan with two heating 2 port valves and 1 hot...
  14. A

    How do I fit a digital thermostat?

    Hi everyone I am hoping someone can offer me some advice. I would like to get a digital thermostat (something like a Nest, but I am open to suggestions on this). However, I am a little unsure on how I would fit it. Does it go in place of the digital thermostat (Drayton, in picture 1) or the...
  15. B

    Do AC powered wireless thermostats exist

    Hi, Does anyone know of a wireless thermostat which can be mains powered rather than batteries? We have very difficult cable routes for the control cables but easy AC supply. It seems a shame to hang the system on batteries if the stats could be main supplied. Thanks in advance.
  16. Spike1947

    Info Required for a Mid Way Actuator !

    Hi I am wanting to replace a Siemens DVA3 Actuator ( Mid Position ) have found one on ebay (Used) but says they changed it , but turned out they had to change the whole Valve unit, now on the one they have it says on the label BPZ DVA3 , mine only says DVA3 , what does the BPZ: mean !. cheers...
  17. Mark Wright

    Switch 2 port Valve with Light Switch...........for project only

    This isn't for central heating really this is for a project Can I switch a 2 port valve like bellow .I.e is the "Switch line" 230v? MCB >>> Junction box >> Line, Neutral, Earth >>> 2 port valve ........................................>> Line split to Light Switch >>> Connected to SL/Orange of 2...
  18. A

    Can anyone identify the make/model of this storage heater please?

    Hi All, after a bit of help and wondered if anyone can tell me if they know the make/model of this storage heater. Recently purchased a property and this storage heater does not work, so looking for parts to fix it or may replace. There is no manufacturers make or serial numbers I can see on the...
  19. D

    Nest 3rd gen thermostat power supply

    Hi, I've got the thermostat nowhere near the heatlink to supply 12v, so currently using the usb power supply. This means that it's cannon fodder for a toddler... I was hoping to wall mount it and supply it from a light switch via a 12V transformer mounted in a back box behind it. Would supply...
  20. C

    FCU at boiler

    My parents have have their boiler replaced but the plumbers have left the ageing controls in place. I’m in the process of replacing the programmer etc and have found there are 2 fuses connection units. One is at the boiler, the second is at the programmer (which also isolated the boiler). The...

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