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central

  1. theboyroberts

    Logic Combi ESP1 35 always showing demand for Central heating

    Hi folks, I've got a potential problem with my Logic Combi ESP1 35. When the boiler is set to Central Heating and Hot water mode, the boiler indicates that there is a constant Demand for Central heating. When the thermostats (TP5000 Si) are turned off (both pulled from the wall and also...
  2. A

    Combi ALWAYS loses ALL pressure ONLY after using the central heating..

    Hey all My combi heats water up no problem. And it heats up the central heating for hours, no problem. But after I've used the heating, the pressure is all gone! Wassap? Thanks in advance!
  3. S

    Hi all our boiler has just had a new expansion vessel fitted but pressure is still going to 2.9 bars when using central heating . Is this normal? Than

    Hi All our boiler has just had a new expansion vessel fitted bit the pressure is still rising to 2.9 bars . Is this normal ? Many thanks
    • Sangita
    • Thread
    • boiler central central heating expansion expansion vessel heating pressure vessel
    • Replies: 5
    • Forum: Boiler Advice Forum
  4. J

    Gurgling and air in central heating

    Hello, Around 2 years ago we had a very old, leaky Baxi combi replaced with a newer Baxi. For background I live in a 3 storey terrace. First floor has 3 rads, second floor has 4 rads and third floor has 2 rads. We noticed problems with noise and air in the system. One of the rads in the loft...
  5. F

    no hot water, central heating works fine

    Hi, I'm new to this forum, please apologies if this is not posted in the right section, or an answer exists already somewhere. I have this issue: no hot water in any tap in the house, but the central heating works fine. The boiler is a Vaillant system 15. A gas engineer had a diagnosis and...
  6. J

    Central heating not circulating after New Navien Combi fitted to Santon Premier system.

    I enjoy a pint at my local pub/restaurant owned by a hardworking Chinese family. I have had many years experience on property maintenance and they asked for my help. He had an old LPG gas boiler feeding a Santon Premier unvented cylinder feeding 23 radiators and hot water for the kitchen. New...
  7. T

    Central Heating Programmes

    Just had a new boiler installed and looking for some efficiency advice, please. We have always set the Heating to run from 6:30 until 21:00 via the programmer and have regulated it from the thermostat. We have used the same setting for the Hot Water. We have a conventional system with our boiler...
  8. G

    Advice on new Smart Central Heating and UFH system

    Hi All, I am getting a new Central heating system installed and looking for advice on the best design. The heating system will consist of the following components: System Boiler. Megaflo. 2 Zone Underfloor heating. 15 Radiators. I have narrowed it to the Heatmiser Neo stat system or...
  9. S

    Central Heating taking two hours to warm up

    Hello, I'm not a plumber, and may get some of the terminology wrong in this post, please don't shoot me down for it. Since moving in to our home several years ago, we've had issues with the performance of our central heating. In winter, the living room can take up to two hours to get upto 18C...
  10. M

    Worcester Boiler is crashing/lockout randomly when using central heating.

    Hello, I've previously had an issue with my boiler pressure getting too high with the central heating on and needing a reset. I had a gas plumber come round and he swapped the expansion vessel. The pressure issue seems to be fixed but now there is another issue... When I turn the central...
  11. M

    Central heating cleaner

    Can leaving cleaner in for too long before a boiler swap cause issues? The ideal boilers cleanser says leave in for between 1 hour and a week. Would leaving in for a couple of weeks really cause issues?
  12. H

    My central heating sounds like it is on when it isn’t

    I have a conventional heating system. Had boiler replaced last August and since then my heating has made a humming noise - even when it is off. Had British Gas come go look at it but couldn’t hear it. I asked if it may be something to do with tanks in loft, but he said no and wouldn’t even go...
  13. P

    Central heating pipework

    Just moved in, and lifted the floor to repair a damaged radiator pipe. The system was originally a gravity fed/ immersion tank as the pipework goes to that corner of the room an back again. There is an extra pipe which goes between the flow and return side of the pipework. The boiler is...
  14. R

    air source heat pump central heating

    Hi I have had a brand new and very expensive air source heat pump installed together with radiators etc (had storage heaters before). The water tank is in the airing cupboard on the first floor. I am hoping someone on this forum has experience with these systems. I have two questions. How long...
  15. G

    Central Heating pipe vibrating when boiler stops

    Hello, Wonder if anyone can point me in the right direction, one of my central heating pipes (think its the length from the boiler to the first radiator) is vibrating when the boiler switches off. I recently had new radiators fitted and the vibration stopped for about a month but seems to be...
  16. T

    Central heating switches on when i turn the hot water on

    I have a Horstmann 425 Tiara with which can be programmed twice a day. When i set the hot water to come on but with the central heating turned off the cental heating still comes on at the time the hot water comes on Is there a way of overriding this or is it
  17. M

    Setting central heating flow temperature

    What temperature is best to set the flow too on a central heating boiler? Setting it at a slightly lower value can make the boiler condense more?
  18. B

    Central heating issue.

    For some weeks now my central heating has been switching off after about ten hours and not refiring. The next morning the heating switches back on a timer and the same issue occurs after a number of hours. Occasionally the blue power light has flashed but on resetting, the boiler fires up and...
  19. C

    Cannot turn off Central heating

    Hi, I have a Worcester greenstar Ri on a Y plan system with hot water cylinder. Problem I'm having is heating won't switch off once on, it ignores the room stat and programme and stays on. I've tried; new 3port motorised valve, new programmer/timer and also new room stat. I've also disconnected...
  20. J

    Central heating not working

    Hello My boiler seems to work fine as I get hot water no problem. The problem is that my central heating isn't coming on. I have a Drayton SM1 control. The switch doesn’t work and the light won’t come on. It still makes the clock sound but the heating won’t come on with the timer either. I...

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