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heating

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  1. D

    Boiler shutting off during heating hot water

    I have a Viessman Vitodens combi boiler. When running the hot tap (or shower), the water comes through hot but then the boiler shuts off, water gets cool, boiler fires up, water gets hot, and so on... Only started happening a few weeks ago. I have replaced the flow sensor, checked voltage where...
    • Dumbaskus
    • Thread
    • boiler heating hot water water
    • Replies: 2
    • Forum: Boilers
  2. 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...
  3. jamesythe3rd

    New radiators not heating

    Having recently replaced my condensing gas boiler, i decided to upgrade two small double radiators which were located in a room which had been added to the original footprint of the house. The new radiators were tall standing double radiators approx twice size of originals. My fitter explained...
  4. A

    Rayburn 499k heating working but no hot water

    Hi all, just this morning seem to have a new problem to us with our Rayburn. Oven and central heating all operating as normal, however we have no hot water from any taps. We would normally hear the Rayburn kick in when hot water is demanded… however it is not. Any help hugely appreciated
  5. R

    Radiator vs underfloor heating

    I am in the process of having an extension for approx 4m by 6 m including sky lantern Whilst I appreciate underfloor heating would be good don’t think I can afford this however would a large vertical radiator be enough to heat the area space
    • Rupssy
    • Thread
    • heating radiator underfloor underfloor heating
    • Replies: 0
    • Forum: UK Plumbers Forums
  6. E

    Cleaning Magnetite in underfloor heating system

    Hi! I have mostly underfloor heating in my house and one new radiator and two old. A bit of metal pipes and three manifolds, but mostly PEX-pipes. The heat source is a Vaillant FlexoCompact 88/4 heatpump. The plumbers which installed the heatpump added Elysator Sanol (cleaning agent) and...
  7. A

    Please help. When Heating on no hot water and vice-versa with Drayton 27101 - 3 port motorised valve

    We have a Drayton 27101 - 3 port motorised valve 22mm compression Issue: when heating switches on there is no hot water, when you switch heating off you get hot water. I replaced the motor in the motorised valve, everything started to work like it should. But an hour later and the same...
  8. 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...
  9. 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...
  10. L

    Tp9000 won’t stop heating

    Hi, moved to the house with tp9000 controller with sensor downstairs and another thermostat in top bedroom. Normally all works ok , ch and hw works as per temperature set points. Once a week(random) downstairs controller will not turn off and heat all the time. No red lights are on so it does...
  11. 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...
  12. M

    Open vented system - Boiler turns on and then loses heating pressure?

    Hi guys, We have an open vented heating system and a Worcester Bosch greenstar boiler. Recently there is little to no heat getting to all radiatiors. It seems that when we turn on the nest heating the boiler starts whirring as expected as then dies down quite fast. I cleaned the magna filter...
    • MattStorey
    • Thread
    • boiler heating pressure system
    • Replies: 2
    • Forum: Boilers
  13. J

    What size heating element is needed for this tank?

    Just wondering what size heating element is needed for a 1200 x 450
  14. R

    URGENT My bathroom underfloor heating is not working

    My bathroom underfloor heating is not working. It does work in the other rooms except bathroom. What could be reason ? I completely closed bathroom thermostat and re opened it still doesn’t respond.
    • Rose Pekcan
    • Thread
    • bathroom heating underfloor underfloor heating
    • Replies: 1
    • Forum: Central Heating Forum
  15. K

    No hot water if the heating is running, but otherwise okay.

    I have a strange fault with a Vaillant EcoTec combi-boiler. It's 100% reliable whenever the heating is called for, ie. by the room-stats. It's also 100% reliable when hot water is called for, ie. hot tap or shower, as long as the heating isn't running at the time. But if the heating is already...
  16. P

    Heating works but not hot water

    I have an Ideal combi isar HE 24. Heating works perfectly but hot water does not at all. Turn any hot tap on and water gets luke warm after about 10 seconds then boiler disengages and water gets cold again. Been told it could be thermistor, or a couple of other things. Can anyone please help?
    • pathill83
    • Thread
    • heating hot water water
    • Replies: 1
    • Forum: UK Plumbers Forums
  17. D

    Grundfos noisy oil central heating

    Hi. We have a wolf oil central heating system, with a grundflos alpha 2 circulation pump. Sometimes it makes a tinkle noise ( like metal to metal) and sometimes not. With and without burner running. I removed pump and impeller is ok and clean. Bled system through. Nothing helps.
    • Donzagabonza
    • Thread
    • central central heating heating noisy
    • Replies: 3
    • Forum: Boilers
  18. G

    Help please! Issues with Central heating & Hot water

    I will start by saying I am not a plumber but I have learnt loads thanks to people on here. I am currently having an issue with heating & Hot Water. It is working but I have to do certain things to make it work each day. The question is about the 2 gate valves in the picture. Valve number 1 and...
  19. A

    Coal heating system help

    I'm going to be helping a friend renovate his bathroom. He has a coal heating system will he be able to continue using his fire whilst we work on the water and heating pipes once the stopcock has been isolated? Will it be ok to drain some hot water out the tank and relocate radiator pipes
  20. P

    How to raise pressure in my samsung 6 gen joule heating system

    Hi Guys, my pressure gauge showing nearly (if not) 0 Bar. Heating downstairs works for now, upstairs 2 out of 5 rads not. I'm trying to get a plumber in but it will take few days, have kids home and afraid to end up with no heat. I believe all what it needs is get pressure back to 1 bar but...
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