combi boiler

  1. S

    Worcester 532/i always 'on'

    Hi, I've recently moved into a new home, which has a combi boiler (my first one) and it's a Worcester 532/i. Everything is working correctly, in that I can make the heating come on if I need it, and there's hot water in the taps. The problem is, it's always making a noise even when the heating...
  2. S

    Can I turn down the central heating temperature on combi boiler if I have TRVs?

    Hi, I've got a combi boiler. I was thinking of turning down the temperature of the heating on the boiler (i.e. on the boiler itself not the temperature on the thermostat). Reading up on this it sounds like setting this as low as possible is the best option in terms of reducing gas usage - to try...
  3. N

    Shower runs hot then cold then hot......

    I have an old Worcester Bosch Greenstart HE plus combi boiler. 3 months ago the shower, which has been working perfectly for last 5 years, would start off at correct temperature and then after about 2 minutes would run cold. Just as it was running cold I heard the boiler fire up and after...
  4. R

    Combi boiler won't start after bleeding rads

    So I just had the heating system drained by a plumber to replace a UFH mixer valve, he filled it back up and left in a hurry. I ran the heating to see if it worked OK and noticed all the radiators upstairs were only half full. I turned the heating off and bled them. I tried running the heating...
  5. B

    Smoke/Carbon Monoxide Alarms (New Scotland Legislation)

    I need to upgrade my smoke alarms as a result of the new legislation in Scotland. I live in a three bedroom end terrace house with hall stairs and upper landing. My Combi boiler is in the cupboard under the stairs. My understanding is that I need linked alarms with one in the living room, one...
  6. G

    'Danger Do Not Use Warning Notice' :(

    I've been advised from another forum that diynot forum would be more suitable.... We moved into our new build home last September. Last week I discovered the combi boiler's first service was due 21st June, so in order not to have any issues with the two year guarantee, I booked a gas engineer...
  7. M

    Another Nest Themorstat (3rd gen) question

    Hi all, I want to replace my current thermostat (pictures below) with the Nest Thermostat, but wire labels don't match. My boiler is Worcester Greenstar 24i Junior combi boiler, which is on the back of the wall where the thermostat is. Any help is massively appreciated on how to set it...
  8. M

    Boiler losing pressure but can’t find leak!!

    Hi, We’ve had an issue with the boiler losing pressure that needs refilling once a week. We’ve had 3 different leak detection companies and they could never find a leak. We’ve had multiple boiler engineers and they can never find an issue with the boiler. Recently, a gas engineer suggested...
  9. Robotman

    Advice on System vs Combi with accumulator

    Hi, I currently have a combi boiler which drops flow rate when a second tap is turned on. I'm also looking to add a second shower. The flow rate i have is 12 ltr per min and i cannot install a blue pipe because a i have a shared mains with the neighbour. I have a couple questions: If i place...
  10. bob-the-intern

    Honeywell T40 to Hive Thermostat Mini

    Hi there, First of all, thank you for your time. I'm looking at replacing my Honeywell T40 thermostat which serves pretty much as an on and off function on my home heating, I've a combi Vaillant boiler and the thermostat is wired to 1 (red cable) and 3 (orange cable) terminals, using the...
  11. TeachMeObiWan

    Vaillant Combi & Hot Water Tank ... Possible? Yes but how best?

    Hi, I'm hoping from some sage advice, from you lovely people. I have a Valiant Ecotherm 832 Combi boiler that was put in about 4 years ago. I'd just moved in, and the place had an old oil boiler that sounded like a jet engine, and an uninsulated hot water tank that was taking up tons of room...
  12. I

    Dual Hive Using For Combi

    Hello, I'm using a Dual Hive for Combi (I'm using this and not single because it got it soooo cheap ). I have researched as much as i can, before asking. Have I set this up correctly ? Hive = Boiler Earth = Earth N =Blue L = 230v Live Out 4: Heating On (NO) = 1 References used ...
  13. H

    Removing plate heat exchanger on a combi

    Hoping for some advice. I need to remove the plate heat exchanger on my combi boiler to clean it. I've switched off the power to the boiler, closed off the valves and drained it using a hose and checked the pressure is on 0. However, when I start unscrewing the screws that hold it in place I am...
  14. Y

    Pre heating water into combi boiler?

    Hi, I have a Worcester Bosch Greenstar 35CDi combi boiler running on LPG. This works very well providing both hot water and central heating. I have recently installed a PV solar/battery system and expect to have more electrical power than I need for about 8 months of the year. I am looking at...
  15. S

    Grant Oil Combi Boiler Hot Water Efficiency

    Hi, We have just had a grant vortex oil combi boiler installed and we have two options to heat our hot water; we can have the water on continuously which will keep the very small water reserve in the boiler at a certain temperature. Or we can have the hot water off and then just boost it when...
  16. J

    Salus RT510RF+ volt free switching

    Hi, I'm currently installing the stated thermostat to a glow worm betacom 24c combi boiler. I've checked the wiring diagrams and done various google searches before I fully proceed, but just wanted one final check about the volt free installation. From what I can see I connect up the L and N...
  17. N

    Drayton LP711 Backplate wiring for Combi boiler

    Hi Community, I hope you can help with this one..? My Ideal Isar HE24 recently failed. Hot water, but no heating. Home insurance sent a man - he said the LP711 timeswitch was at fault and did a temporary fix as an override. So now, when the boiler is switched on the central heating is on...
  18. N

    Another combi boiler hot water problem

    I was wondering if anyone had a suggestion or idea that may help. We have a Baxi Duo Tec 33 erp, which is about 5 years old, and working absolutely fine until last week. The central heating is working perfectly, however, when you turn the hot water on, after a few minutes (long enough to fill a...
  19. A

    Installing nest 3 on combi boiler with unvented indirect cylinder.

    I got the nest to work great with the heating of the house (gas boiler), but the hot water for the house stopped. So no idea what happened. This made me think I should connect 4 to 10 on the main wire box as that is how the nest can talk to the water tank. Is this wrong? 20211106_162911 by...
  20. R

    Glow-worm Combi making loud banging noise!!

    My mother-in-laws Glow-worm combi has starting making an awful banging noise. Apparently it started about 5 years ago and successive yearly services by a couple of heating engineers has never come up with a fix. One suggested a pipework problem somewhere. In the last year it has become more...
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