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central heating

A central heating system provides warmth to the number of spaces within a building and optionally also able to heat domestic hot water from one main source of heat. It is a component of heating, ventilation, and air conditioning (HVAC) systems, which can both cool and warm interior spaces.

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  1. L

    URGENT Hot water only works when central heating turned on too. Why?

    Hey everyone, I'll keep it short. Had our old system boiler replaced with a new Ideal system boiler set up. Then the problems began. First issue was the pump went faulty, so the pump was replaced. This then led to a new issue coming up where the central heating would work, but not the hot...
  2. W

    How to remove elbow in photo

    I am replacing the radiator and need to solder a fitting new the existing elbow. I am concerned the heat will damage the elbow but have not seen this type before and would like advice on removing the copper microbore so I can solder a joint onto it then refit it in the elbow. Is it similar to a...
  3. G

    Central heating pipe layout

    Hi. Hoping someone can advise. My heating system has 19 radiators. 13 downstairs and 6 upstairs. The downstairs layout has 3 loops with feed and return. The first loop has 3 radiators, the second loop has 7 and the 3rd loop has 3. All 3 loops return to the boiler via the main 22mm pipe...
  4. I

    Help with New Vaillant Boiler not staying on

    Dear All, Please kindly advise, i don't know what else to do! Had new boiler Vaillant 424 heat only open vent boiler installed with new flue and filter, new pump, plus new Hive. Did full power flush of all 5 radiators before the installation. It has been 10days and boiler stil not working...
  5. D

    Limescale cleaner for central heating

    Hi Where I am living the water is very hard. The result is my heat exchanger most likely has accumulated limestone. The problem is that due to the limestone accumulation the boiler is cutting out at high temperature, thus not having the possibility to transfer enough heat to the radiators. Is...
  6. Ticking sound

    Central heating clicking noise. New install

    New install, under a year old. Boiler downstairs. Mega flow upstairs in airing cupboard. Undfloor downstairs. Rads upstairs. Whenever the heating comes on. I get a clicking ticking buzzing type sound. Please see videos. Coming I think from the metal boxes. Both upstairs and down. I believe...
    • Ticking sound
    • Thread
    • central central heating clicking heating install
    • Replies: 7
    • Forum: Central Heating Forum
  7. J

    Central heating on if water is on

    If the hot water is on, hot water is running round the CH system, even if CH is switched off. Vaillant tell me that you control the temp of the HW at the tank. And indeed I can’t adjust the water temp at the boiler. But if I increase the temp of the CH, the HE gets hotter. Also, if I turn...
  8. V

    Central heating turns off early hours in morning

    hello experts, I am not a DIY plumber, just a home owner who had a plumber come in to fix a couple of things at home. But doing all of this, he may or may not have introduced a new problem which I wanted to get advice on from you experts Every night since the plumbers visit, the central...
  9. J

    What should I expect from a competent central heating engineer?

    I had an engineer out today to quote me for a boiler install. It got me thinking, what should they be doing so I that I can see they're competent? This thread is inspired by something I read on here earlier.
  10. G

    Baxi 105e CH loud screeching/whining

    Hi, around 3 week following a diverter overhaul with a valve and seal kit (due to leak between diverter housing and diff housing) the noise started to occur within a few minutes of activating CH. I'm pretty sure the noise is coming from the diverter and it is carried along pipework in walls and...
  11. G

    URGENT Need Advice about Boiler and Central Heating Repair Please

    Hi. I'm having some issues with my boiler / central heating and have enlisted a local 'Combi Heating Specialist' to sort it out but he seems to be making things worse. I really need another expert's opinion, to put my mind at rest, or help me make the decision to stop using his services. I...
  12. L

    Weird central heating issues

    Evening all. I am just trying to get some idea as had a couple of plumbers round but still getting same issue . Basically moved house recently and i just cant get figure the central heating system out .So.... Its had a new Worcester bosch boiler about 2 years ago so all good on that front and...
    • leethomp
    • Thread
    • central central heating heating issues weird
    • Replies: 3
    • Forum: Central Heating Forum
  13. B

    Ever had Central Heating Water leak INTO Cylinder fresh water ?

    Hi, Vented system, F&E Tank etc. Cylinder about 10-12 years old. Just running some x800 through to try & improve radiator heat. (another story) Been in a couple of hours. Just run a bath & the water has a slightly odd brown'ish tint to it. never had before. does not smell. Is there anyway it...
  14. B

    Central Heating cuts out when DHW reaches set temperature

    Hello, I hope someone can give some advice with this problem. I have a Vaillant ecoTec plus 418 with Drayton MA1 mid-position actuator, Drayton HTS3 cylinder stat, Honeywell DT90E room stat and Drayton LP522 controller. Boiler fires up reliably, but after it cuts out as soon as the DHW...
  15. T

    Central heating room thermostat replacement

    Hi all, I have a simple mechanical Honeywell wall thermostat (i think you call it a 2 wire). I want to replace it as it is a bit old and unsightly and seems to have a lot of "play" between on and off. I could obviously easily replace it with the same thermostat or a very similar one, however i...
    • TheBigMatt
    • Thread
    • central central heating heating replacement thermostat
    • Replies: 4
    • Forum: Central Heating Forum
  16. M

    Central heating switches off

    Boiler is working but out the blue is goes off. Controller is working, receiver is working, can see it clicking and red light flashes when I move thermostat up and down. If I override hot water, boiler fires up but nothing for heating. Boiler is Worcester Greenstar, 2 yrs old. Brand new...
  17. N

    Dual zone central heating query

    Hopefully a quick question: I have bought a new house and had a few issues with the CH system (they connected the valves for the two zones to the wrong thermostats which has now been fixed) but have now come across something that doesn't make sense to me. I have a downstairs cloakroom (toilet)...
  18. A

    Understanding gas central heating system

    Hello everyone, We have recently moved to the UK, so really don't know much about gas central heating and boilers over here etc. So this is probably a very basic question but I just don't know! We are moving to a house later this month. It has a "wall-mounted gas-fired boiler for domestic hot...
  19. S

    How to test central heating pump?

    Happy New Year everyone! I need a little help on figuring out what's wrong with my central heating (CH) system. I'm in a new house, and I know the system has a single motorised diverter valve for hot water and radiators (rads). Problem is almost none of my rads get hot, except for 2 or 3 that...
  20. B

    HW not working when CH is on

    I have a problem where my HW heats only when my CH is not on. When both are on only CH works. I have insurance for the boiler and heating, but not covered for just heating issues (should have read the small print). I have changed the mid port valve actuator and the programmer (Drayton for...
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