combi boiler

  1. 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.
  2. 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...
  3. 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...
  4. 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...
  5. 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...
  6. 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...
  7. 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...
  8. 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...
  9. 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...
  10. 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
  11. 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...
  12. 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...
  13. D

    best replacement combi boiler ?

    want replace worcester 35cdi combi have 12 rads, 2 showers, which boiler best replacement?
  14. 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...
  15. L

    Potterton Combi Boiler Frequent Pressure Loss in Winter only

    Hi, My Potterton Heatmax Boiler is nearly 10 years old, but has been serviced regularly and the Pressure Release Valve was recently replaced. It frequently loses pressure throughout Winter, when the heating is in use. During Summer months, it's fine! All radiators are all heating up to HOT and...
  16. S

    Help... Combi Boiler or Unvented system

    Hi, just moved into a new house and have a 25 year old heat only boiler, 114ltr hot water cylinder with central heating pump. Noisy and not efficient. It’s a 4 bed house with two bathrooms. Main one has bath and shower and second one has a shower. Flow is 16 litres minute and 2.3 bar pressure...
  17. C

    Trianco Eurostar combi boiler going off

    Morning all, Can anyone shed some light on said boiler? It’s going off on unexpectedly. This is only the second time it’s done so in 3 weeks, boiler doesn’t go in to lockout. The first time was just after having heating oil tank topped up, but far as I can see oil is flowing freely to pump. The...
  18. S

    No Hot Water Combi Boiler

    I have a Grado Gr10 combi boiler, but this afternoon I’m getting no hot water. The heating comes on fine. This morning it was working fine.
  19. M

    Nearly new Keston combi boiler flue coughing/ejecting hot water & steam

    Hi everyone I would be grateful for advice about possible causes of excessive quantities of water being ejected from my flue. When the boiler switches on in the morning, the flue exit from my apartment block generates a lot of steam and then coughs up glass-amounts of water, falling on the...

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