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combi boiler

  1. K

    Does combi boiler need an external pump or not?

    My conventional boiler needs to be replaced. One engineer suggested combi with an external pump because water pressure in my flat is low, the other said there's no need for a pump. He even said that if the pump would have a detrimental effect on the boiler. Who is right?
    • Krzysztof
    • Thread
    • boiler combi combi boiler pump
    • Replies: 5
    • Forum: Boiler Advice Forum
  2. B

    Combi Boiler pressure refill?

    Hi, Just had a "Main Eco Compact" combi boiler installed as the Biasi one failed. It seems to work fine, gives a hot bath, i dont ever use the radiators or kitchen hot tap. (no point in upping the landlords gas bill for no reason) On day 4, the pressure is below 1. I filled it back up to >1, but...
  3. P

    Combi boiler: my hot water has started running lukewarm.

    I have a Combi boiler and, a few minutes ago I turned on the hot tap in the kitchen and the water was far from hot. In fact, it was decidedly lukewarm. I checked the boiler and the tap icon was lit up, showing it was delivering hot water to the taps and I could hear the boiler running and the...
  4. N

    Combi boiler install doesn't seem quite right.

    I've just had a back boiler removed and combi boiler installed and have noticed that my radiators are heating up when using the hot water. I've been told this is due to the residual heat being moved around the system once the hot water is satisfied. But the radiators are heating up as soon as i...
  5. J

    Help with potterton combi boiler bangs when cooling down

    My boiler constantly bangs after its been shutdown for an hour or so..sometimes it's 5 or 6 getting shallower other times it's a few more 10 to 12.Its always after I've Ean the hot water on my potterton combi boiler. I live in uk and would love some help with this annoying issue. Thanks.. Jon
  6. I

    Water Softener advice now I've moved to combi boiler

    Hi, We have a Kinetico 2020c HE Water Softener, fitted in 2008 in our loft to the cold water tank in a vented system with a conventional boiler. All good, was working fine. Recently our old Potterton Suprima conventional boiler packed up and we decided to change to a Vaillant EcoTec COMBI...
  7. F

    Oil Combi Boiler Hot/Cold/Hot

    Hello. I have an oil fuelled combi boiler and the hot water starts hot, then goes cold for a few seconds and then back to hot... Is this right? Thank you.
  8. A

    Heatline combi boiler

    I have a heatline vizo 24 combi boiler that starts up for a few seconds and then shuts off. This happens with both hot water and heating. If left all overnight or all day it will work first time and stay on. If tried again soon after the problem comes back.
  9. I

    Combi boiler question regarding usage with no pressure

    Hi, just a quick question. Do I need to fill my combi boiler to run it for hot tap water only? I'm planning to drain the system and leave it drained a while so I can decorate and change some pipes and rads.
    • Iwillhaveago
    • Thread
    • boiler combi combi boiler pressure
    • Replies: 1
    • Forum: Boiler Advice Forum
  10. J

    Combi boiler obsolete part dilemma

    Hi everyone, I have been searching the Web for a spare part for a Worcester 35 cdi ng boiler that is obsolete. I can't find one anywhere and its looking more and more likely I'm doomed . The part is the door extrusion seal 87161031280. I have sold my house STC and this has just happened , so...
  11. W

    Combi boiler - bang when hot water opened

    Hi All! I hope you can give me some advise. I had combi boiler (Viessman vitodens 100-w 30kW) installed about half year ago. Recently I start hearing one single bang when hot water is opened at any of taps around house. It sound like someone in other room will knock a radiator (not relly loud...
  12. M

    Shock arrester combi boiler

    I usually fit these on the cold feed to the boiler close to the boiler. But if fitting near the boiler would be unsightly. Would they still be effective fit somewhere else in the cold.feed in the system. Say under the kitchen sink? Thanks
  13. G

    combi boiler system draindown problem

    during drain down of system with all trc open and bleed valves open water just continues to drain out and boiler pressure remains at 1.5bar.Baxi combi boiler 105
  14. Prof Yaffle

    Combi boiler losing pressure - No leaks, many new parts, but still...

    I'll pop this into the general advice forum as it seems the most active, but mods - feel free to move if there's somewhere more appropriate. Thank you! --- Apologies, but yet another "boiler losing pressure" thread - I've read many others, but am no closer... Not my boiler (parents), so...
  15. J

    Gloworm combi boiler help!!!

    Some advice would be very much appreciated. Our Gloworm Ultracom 38CXI combi boiler recently developed a few issues. Recently some our taps/shower but not all of them will run hot initially and then run cold after around 2 minutes of running hot. The heat exchanger was replaced by our...
  16. computermike

    Pipes in concrete floor with combi boiler

    I am looking to replace an oldish boiler and hot tank with a combi boiler. The house dates from around 1968 and quite possibly the (copper) piping could be that old. I had someone round to give a quote and they said they would not recommend a combi boiler because the piping downstairs was buried...
  17. J

    Combi boiler keeps locking out

    Hi everyone. I was hoping someone here might be able to help me with a problem I have. After using our shower for around five minutes it seems to be causing the boiler to lock out. It’s a thermostatic mixer shower running from a Worcester Greenstar 30si combi boiler. Weirdly, this only seems...
  18. S

    Need to renew 17yr old combi boiler.

    Renewing 17yr old Gloworm combi boiler, running dom h/w and 15 rads, 40% are doubles. Water flow from stop valve has been measured as 6L p/m, is that enough to run system effectively?
  19. C

    Old Combi Boiler Firestop Advice please

    Hi, We have 28 year old Valiant Combi Boiler in our Bungalow airing cupboard, where the vertical fan flue goes up into roof. As you can see in photo, we need a firestop plate, A) for fire safety B) Hopefully seal around pipe may stop warm air travelling through gap into roof space, and causing...
    • Chainsawcharlie
    • Thread
    • boiler combi combi boiler
    • Replies: 4
    • Forum: Boiler Advice Forum
  20. R

    Combi boiler temperature differential

    2 years ago I installed a Baxi 836 and every year the owners complain about the water temperature. Last year I couldn't find anything wrong but this year there's definitely a low-temperature hot water output. Although this is usually a warranty claim I'm having difficulty with this as I messed...
    • Robert Tyrrell
    • Thread
    • boiler combi combi boiler
    • Replies: 3
    • Forum: Boiler Advice Forum

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