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hot water

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  1. P

    Intermittent hot water problem wb combi

    WB combi has recently had it's annual service. It has been working reliably up to that point for many years. Now we keep losing hot water - temps on boiler increase over 100 on the display and it shuts down heat. Engineer claims it's coincidental and must be a blocked heat exchanger that has...
  2. 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...
  3. R

    Hot water coming on combi sometimes other times not

    Hi guys thankfully not been needing to com on for a while but could do with a pointer. 2 weeks ago I noticed boiler didn’t fire for hot water in kitchen which is next to boiler and cold main in, it came on after a few seconds longer than norm I thought just a blip, but this weekend and since...
  4. R

    Baxi 228 combi boiler hot water flow rate poor?

    Hi, Just checking I'm not talking rot. Today I visited a house with a Baxi 228 combi boiler. The technical spec for the DHW output is shown in the image. Boiler was installed 27 months ago. Baxi is claiming 13.3 litres @ DT 30. I set the boiler DHW temperature to a high setting. I was...
    • Ric2013
    • Thread
    • baxi boiler combi combi boiler flow hot water water
    • Replies: 6
    • Forum: Boilers
  5. H

    Benefits of one large hot water tank over two in parallel?

    A friend is building 5 en-suites above his pub. An advisor has said he needs a 64kW gas boiler to heat 7-8 radiators and an 800-1000 litre water tank to make sure guests have hot water when they need it. This seems way over the top to me - especially as it's not guaranteed that there will always...
  6. S

    Unable to run bath of hot water after boiler change

    Heating System Have 2 houses where identical Heating systems installed (self & neighbour) In Dec both Baxi boilers were replaced with Viessmann Vittodens 30W due to ageing reliability issue. System is as per drawing Hot Water Draw off Thermal Store operates by the process that as DHW is drawn...
    • sargan
    • Thread
    • bath boiler hot water water
    • Replies: 58
    • Forum: Boilers
  7. Ted808

    Worcester greenstar, Hot water intermittent.

    Heating works and hot water- sometimes, but I noticed when I turn the hot tap on the pressure gauge drops to zero. I've not seen this before. Topping up the pressure doesn't seem to make a difference. As soon as the heating only is on pressure goes back up to 1.5bar. The thing is the flat is...
  8. K

    Hot water no heating

    Hi, I have just had me diverter valve and cartridge replaced so solve my original issue of have both heating and hot water on at the same time without the option to turn off. But now I can’t turn my heating on. It’s on, on the boilers thermostat but doesn’t heat. I’ve disconnected all other...
    • Kyle Magee
    • Thread
    • heating hot water water
    • Replies: 0
    • Forum: UK Plumbers Forums
  9. WizPip

    Fast hot water then noise and normal flow after heating hot water

    Hello, I'm a fairly adept DIYer but I have an issue with my plumbing and not entirely sure what's left to check. I have an unvented indirect system with 1 hot / 1 heating zone, cylinder is a Range Tribune HE 150L pre-plumbed. For quite a while now I've had a problem where after the hot water...
  10. L

    Hot water pipe 'inline air release valve' - Question

    Hi, DIY homeowner here. Ist floor of house. Front bathroom hot water draws from cylinder which is heated by the Greenstar 28i Junior Combi located on the same floor. To get from cylinder to bathroom, the water goes up, horizontally over a stairhead, and back down into the bathroom. After...
  11. A

    UFH mixing valve bypassing hot water directly to cold return

    I have a UFH manifold from Wundatrade with a Grundfos pump. The pump feed has a mixing valve which has a hot inlet from the thermal store, and a cold inlet from the return manifold. In-between the mixing valve cold inlet and the return manifold, is a tee which returns the cold water to the...
  12. T

    Vitidens 100 W - new unit, no hot water

    Have a recently installed Vitodens 100-W, within the last week, & hot water has been intermittent at best. I'm seeing F.373 - 50 & F. 345 - 50 fault codes. Install follow- up has been unhelpful. I,m also seeing standby temps reach 195 F (91 C) which sounds dangerously high.
  13. A

    Why poor hot water supply?

    Three years ago I decided to switch from an under floor gas warm air system to a modern radiator system. I had installed a Worcester Bosch 38CDI Classic Combi feeding eleven radiators of varying sizes. I live in a fairly large bungalow and whilst the heating side is acceptable I am very...
  14. D

    Hot water keeps running out

    Hi A few times my hot water has ran out but nobody has used the hot water all day and it’s always on at the emertion so we always have hot water! Any idea y this would happen?
  15. T

    why does my boiler turn off when i run hot water

    hi all, my intergas boiler is working well with heating but when i turn on a hot tap it goes off, lights out on panel it will come back on after turning off at the mains spur for a minute . i have found if i turn on the hot tap on a very slow trickle. i have had the cover off the boiler and...
    • tonyden
    • Thread
    • boiler hot water water
    • Replies: 2
    • Forum: Boilers
  16. A

    Hot water only coming through while preheating

    Hia, I have a baxi instant combi boiler the hot water doesn't work at all. No faults showing. The only way I can get it to work is by putting the 'preheat' on....as soon as the preheat reaches the correct temperature the water goes cold and I have to wait for it to cool down so I can put the...
  17. N

    Range Tribune HE, not heating hot water

    Range Tribune HE, not heating hot water. Motorised valve keeps closing and water luke warm. Is the dual temperature probe broken
  18. Crossfingers

    Oil boiler dripping hot water

    Please help Our Grant Vortex Pro oil combi boiler seems to have developed a drip from some sort of valve where it looks like there's a limescale build up. There is no water at all from hot tap and no pressure in the boiler. The heating works fine however. Is there something I can do or should...
  19. F

    Vaillant ecotec+831 - no hot water

    I have a Vaillant ecotec plus 831 (one with small circle buttons) and it has passed gas service not long ago. However, the problem I have is when there is a power cut, once the power has been restored, the boiler says 0c and will not heat water or radiators regardless of what (2 exceptions...
  20. A

    No hot water coming out from upstairs taps

    Hi there, I am in urgent need of advice! The weather has plummeted over the past week so at nights its -6 so this may be the cause. Anyways, since early this morning there has been no water coming out from the upstairs hot taps, both sink and bath. The cold taps work fine, I have checked...
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