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combi boiler

  1. M

    Combi boiler shower hot and cold

    I had a plumber out to service and do a gas certificate for my combi boiler. Since then my shower that runs off the boiler will not stabilise temperature. When I twist the single lever mixer tap the shower goes too hot or too cold. He says this is not his fault and will not come back. I say it...
  2. L

    Combi boiler modulation for low heat output

    I'm looking to buy a 24kW combi boiler with only 4 radiators rated at 1.7kW each, so I can later expand and add more radiators. I expect relatively low heat dissipation from the heating circuit. If I run the boiler from cold, the water heats up to say 40 degrees in the heating circuit and the...
  3. J

    Will a new Combi boiler improve shower flow??

    As the title says. I have been going round in circles deciding what to buy or get fitted (with a raft of various advice).....the short story (so far). I have an old Combi boiler needs replacing and, I am having a new bathroom installed in October but, I want to improve the all round shower...
  4. A

    Recommendations for new combi boiler install

    Hello, I'm looking for advice on replacing a back gas fired boiler with a new combi boiler. I was thinking of placing the new combi boiler in the store room where the mains gas meter is located. Been looking a Worcester Greenstar 32CDI compact combi boiler but really looking for recommendations...
  5. L

    Worcester 34 cdi combi boiler

    Guys Worcester 34cdi combi Gc no 47 406 36 the heating works fine. On hot water the boiler temp builds to 100 and cuts out. Obviously hot tap goes cold. As heating was working fine and stays around 70 I decided it must be the plate. Presumed pump ok as well Changed the plate heat exchanger...
  6. T

    combi boiler not kicking in

    Hi all, i'm relatively new to the world of plumbing and bathroom fitting. I've recently fitted a bathroom and the new basin tap (Bristan Orta Mixer) wont kick in the boiler when the hot is turned on. The new bath mixer and the existing kitchen tap work fine although the hot has to be turned...
  7. J

    Bosch CDI 30 combi boiler

    Hi, my boiler has been having an intermittent fault no one can seem to cure. When the hot tap is used , usually first time in the morning, it creates the boiler to over heat. I have to wait for it to reset itself and cool down then usually ok. Apparently not heat exchange plate.
  8. I

    Combi boiler swap.....how long?

    Just wanting to hear people's thoughts on how long you take/quote to carryout a straight forward combi swap. I am currently quoting one day and I must admit it can be a struggle, especially when there is more than average amount radiators to flush. Basically, my wife thinks it should be a day...
  9. N

    System or combi boiler?

    Hi guys We want to do a whole revision of our boiler system- we currently have a system boiler at the moment with a water tank upstairs. One bathroom currently with electric shower and a 2nd bathroom still being constructed. What do you guys advise? Please let me know if this is in the wrong...
  10. marcuspreedy

    No DHW from combi boiler

    Hello I am having to replace the unvented hot water system in my property, and as a temporary measure to get DWH downstairs I have un-isolated the supply from my Grant combi boiler. But, no hot water is forthcoming! I think it may be a problem with the Danfoss set3e programmer which a builder...
  11. J

    combi boiler, pressure continuously increasing.

    Hi, I have a vaillant ecotec plus 837 and one day noticed the pressure was maxed out therefore bled the radiators to drop it down to 1.2~1.4 bar. Two weeks later, I noticed my pressure increased back up 2.5 bar so had to bleed the radiators again. A guy at work told me the increase in...
  12. D

    What is this error code on Bosch combi boiler?

    I've been having problems with my boiler since I moved house. Today my Hive thermostat was offline, then it recovered but after that my boiler's central heating had problems starting. I've reset the boiler AND turned it off/ on and despite that I am getting the above error - which I cannot even...
  13. T

    Hi.... and a combi boiler pressure drop query!

    Hi Just joined forum as amateur DIY guy and wonder if anyone here can help me. I have a Vaillant 828 Turbomax Combi boiler which I’ve had for about 16 years old. I monitored the pressure yesterday & saw that it was quite low (around 1) so I topped it up to just over 2 and when I went back to it...
  14. J

    Combi Boiler Size advice

    I'm looking to have a Combi Boiler installed along with 8 Radiators in each room along with a Towel rail in the bathroom. I wanted to check with people what size combi boiler people think I need as I have had one company who has quoted me for a Worcester green star 28cdi compact boiler and have...
  15. T

    Water pump issue? combi boiler

    Hello, I have a heatline s-24 boiler. Recently when the heating is on, the radiators on the ground floor (where the boiler is) are cold (sometimes warmish at the top of the rad) while radiators in the upper floors are hot. From what I read online that means the pump is gone. However, sometimes...
  16. A

    Combi boiler firing noise

    My combi makes a noise when firing up, rather like a "whoof"sound, and a but louder than it used to. Can anyone other any advice as to what the problem is of if there is one? Thanks in advance
  17. J

    Intergas HRE 28/24 Combi boiler on Melamine/Ply board?

    Hi all, I have tried to email Intergas about this and they still haven't got back to me!! I have a plumber installing a new boiler and want to know if i need to remove the melamine board the previous boiler was on and fit a ply board then cover with plasterboard to get over the combustible...
  18. L

    Back up to combi boiler

    Hi I went to a landlords today and the guy who had installed the combi boiler (in loft) had hooked up Red ring power stream 10.8kw instant water heater as a back up to the combi boiler. It was isolated and drained whilst the combi was working, and connected in a similar way you would by pass a...
  19. D

    best replacement combi boiler ?

    want replace worcester 35cdi combi have 12 rads, 2 showers, which boiler best replacement?
  20. M

    Combi boiler: water pressure question.

    My son recently moved house;...the CH boiler is an Ideal Logic Combi ES30 and it’s about 2 or 3 years old. When the system is cold the water pressure shows approx 1.9 bar,...when the CH has been on for a while and everything is fully heated-up the pressure gauge rises to approx 2.9 bar. If the...

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