central heating

  1. M

    System boiler - should HW automatically come on when CH is turned on?

    Hi all, I moved in to a new house earlier this summer which I believe has a system boiler (I'm used to a regular boiler in my old house). The HW is programmed to come on twice a day. This week (as I am sure a lot of people have :)) , the CH went on for the first time. I noticed that when the...
  2. SomethingSomething

    New CH system - hiding pipes?

    Hi All, Thank you for your time! FTB's - We're moving into a new property in 2-3 months time which currently has an old-style gas multipoint water heater and electric storage heaters, but no central heating. The property is a 1950-1960s end-of-terrace three bedroom, would there be any...
  3. T

    Nest

    Hi About 2 months ago we had a neat fitted and UFH with its own thermostat. The CH did work when it was first installed but with it being summer it was left unused. Now the Nest does not appear to be firing up the boiler. The green dot is on the heat link which means they're connected. The UFH...
  4. D

    Why aren't central heating biocides widely available?

    Last autumn, I cleaned out the central heating system (old back boiler with F&E) with X400, and dosed with X100. It hadn't been touched for a good few years prior to that. A few months later, I find this gunge in the tank (stringy/white stuff) which Google tells me is probably bacterial and...
  5. P

    Preparation of concrete subfloor for wet UFH

    Hi All, I am doing a kitchen extension. 3m X 6m, and like to install wet ufh. need help to decide the best way to prepare my concrete subfloor for wet ufh. option 1: mot + sand blinding + dpm + kingspan + dpm+ concrete + ufh boards (18mm) + ufh pipes + screed + tiles option 2: mot + sand...
  6. T

    Draining down coz non-working CH rad. Re-use the same water?

    Hi Householder here. Non-expert. Central heating circulation. One of my (total three) radiators doesn't get hot. It is full of water (no air). There is a regular lockshield value at one end and a TRV at the other. They are both open. I have checked the spindle in the TRV (FAQ6). The...
  7. L

    System boiler has lost pressure after temporarily taking down radiator

    Hello, We recently took down a radiator temporarily for paintwork. (We have an Ideal Logic System boiler with hot and cold water tanks in the flat, if useful to know). We re-fixed the radiator this morning but now have no hot water or central heating. We have an F1 error message - all water...
  8. R

    Identifying parts

    I have just dismantled my old oil boiler (22 yrs old) and electrics that go along with it. A new one will be installed later in the year, and moved to a different location due to building works. In doing so, there are a couple of components in the electrics that I have no idea what they are...
  9. 0

    Help with Honeywell DT2 Thermostat install

    I'm replacing my thermostat with a digital one as the old one always overheats the house. The old one has three wires: The new Honeywell has a few options for wiring in the manual: I connected live (brown) to A and 3 (grey) to B, leaving the other two wires unconnected. When doing this...
  10. OwainOW

    Another st699 to hive thread

    Hi all, Sorry to add another thread but I’m looking for some help. I have installed a hive v3 water and heating replacing my old st699. This was prompted by removing the old thermostat that I thought wasnt working and doing nothing to find it was infact setting the heat of the house and plunged...
  11. S

    Help needed with pipework for oil-fired central heating!

    Hi there, we're hoping to install oil-fired central heating in our house but just needing a bit of help/advice with the pipework. We want to open the floors and get the worst of the runs in ourselves as our budget is limited with a baby on the way!! We have the boiler, oil tank and radiators...
  12. B

    Central Heating always on boiler won’t shut down (Ideal Logic 15)

    Hi, last night our central heating system seems to have developed a problem. Our boiler is an Ideal Logic 15. It appears that the thermostat is working fine (?) but somehow the boiler thinks there is a constant demand to supply heating. For example, thermostat currently at 20c and the flame...
  13. C

    No central heating on BAXI DUO-TEC COMBI 24 HE

    Hello everyone, My home has a BAXI DUO-TEC COMBI 24 HE. The radiators won't heat up even though the boiler is showing a green light saying they are running. The hot water is still working though. I've tried bleeding radiators and then pressurising the boiler after but I still have the same...
  14. M

    Leak from boiler/CH losing pressure

    Hello, I moved house recently and one issue that I noticed after a week or so was lots of trapped air in the CH. Two or three upstairs radiators had about 1/2 to 1/3 of the top feel cold. The system also had too little pressure to force this air out when bleeding the radiators (the boiler read...
  15. J

    Weird Squawking/Squeaking Noise around House

    Hi, Moved into a 4-bed Edwardian (1906) terraced house. For the past few weeks I've been hearing a mysterious squawking sound, in different rooms (kitchen, living room, upstairs back bedroom) at different times. Audio and separate video below. When they happen, they are precisely 31 seconds...
  16. eveares

    Hive Thermostatic Radiator Valve Won't manually change!?

    I have a problem with one of my new Hive Heating thermostatic radiator valves that I got last month, it has stopped responding to manual temperature changes via the valve it's self, but the valve still wakes up when you go to manually adjust it as shown in the video. Have I accidentally enabled...
  17. G

    Nest Gen 3 to replace an old Horstmann Potterton controller to a Ideal Mexico 2 Boiler

    Hi, We have just moved in to an old property with a Ideal Mexico 2 boiler controlled from a Horstmann Potterton controller. The timer function has just stopped working and I thought I could upgrade the potterton controller to a Nest thermostat with heat link. I think the Ideal Mexico 2 is a...
  18. eveares

    Can you group Hive TRV's together where there is more than one radiator in a room?

    Hi all, for a long time I have just had three Hive TRV's. One in my bedroom, one in my bathroom and one in the spare bedroom. I have just installed 6 more Hive TRV's for the remaining radiators in the house (except the main bathroom rad what intentionally does not have a TRV) and wanted to know...
  19. D

    Cream-coloured foam in header tank

    I have a very old system with a back boiler, and a header tank in the loft. It has a TF1 filter, fitted 5 years ago, but has largely been neglected over the years. In September I tried the heating and it wouldn't come on. Also, the header tank was full of brown sludge, which I cleared out...
  20. Y

    Boiler Not Firing for Heating - Works for Hot Water

    Hi looking for advice in where to start with fixing our boiler. The boiler doesn’t turn on when central heating only is on, but seems to work fine when hot water is on. Three way valve seems to be fine, in that radiators warm up when hot water and central heating are on, and cool when only hot...
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