central heating

  1. F

    Foolproof CH & HW programmer

    Can anyone recommend a really straight-forward simple programmer for my elderly parents who need a replacement. It's probably going to need to be analogue unless there is something special designed for old folks. Many thanks
  2. P

    Recharge expansion vessel on CH

    Hi, I am planning to recharge the expansion vessel on my central heating and need some information. I have heard people say that it has to be removed to recharge it. Is it right? Some others say that I have to drain the Central heating before I pressurise it if I don't remove it. I am confused...
  3. GoodOne

    ideal Mexico - CH working but not HW

    Hiya, My HW (hot water) not working after I drained my CH (Central Heating). I released all the air pressure in all radiators. When I set the control to just HW, I can see the fire start for a couple of minutes and then it went off. Any idea why? Should I bleed the myson unit five pump? Is...
  4. engineerSteve

    Diagnosing heating system fault

    Hello, I have a situation that may resonate, I think there could be two faults: Situation: excessive oil being used in heating/hotwater system, pump never turns off, radiators often hot even when programme is set to off/off. There is a drayton motorised valve on a Y valve Often one can hear...
  5. G

    Too many zone valves

    hello Hope someone can help! Fitting Hive thermostats to a large home which has a fully pumped system with dual zone central heating and hot water cylinder running off a Potterton gas boiler. Confused by the three 2-port valves which are on the flow side of the system immediately after the pump...
  6. A

    Half of my radiators are cold! Suspect sludge.. advice please!

    Hi I live in a 2bed first floor flat with 8 rads, I have a 5yr old Vailant Combi boiler. The radiators in my kitchen, spare bedroom & storage cupboard are stone cold and recently the radiator in the bathroom cooled and stopped working. I've not had an urgent need to rectify this until...
  7. K

    Voker Unica HE - Hot Water but no Central Heating?

    Hi Everyone, I've been struggling with this for a week or so now and after reading a few similar posts, I thought I would see if anyone could give me a little bit more advice. I apologise in advance as there is a little bit of a backstory to this. In December our hot water started going...
  8. S

    New thermostat not turning central heating OFF

    Hi, I have a Worcester greenstar 28i junior combi boiler and a tower rf wireless thermostat that I purchased from toleration which I am trying to install to replace the wired British gas one. The wires connected to the old British gas one were brown to the L terminal, blue to the N terminal...
  9. S

    New thermostat not turning ventral heating OFF

    Hi, I have a Worcester greenstar 28i junior combi boiler and a tower rf wireless thermostat that I purchased from toleration which I am trying to install to replace the wired British gas one. The wires connected to the old British gas one were brown to the L terminal, blue to the N terminal...
  10. I

    Central heating pump short overrun

    Hello All Can someone shead some light on my central heating please. The pump comes on for a bit after the heating goes off, here's what happens. I have a standard boiler pumped with HW tank, with a room thermostat for the CH also a programmer When the room thermostat calls for heat the pump...
  11. eveares

    Is this even real?

    Does one in the land of the free not know about water valves? :D:rolleyes: Skip to 6:00 for the fix!
  12. andyr123

    Frost Protection on outside oil boiler module

    in the instructions on our Grant Euroflame outdoor kerosene oil boiler it says that a pipe state fitted to the return water pipe may be fitted to offer frost protection and that it shall be set at 30 degrees centigrade. If water freezes at 0c i wonder why they say to set the stat at 30c ? -...
  13. L

    Radiators won't bleed - no pressure

    hi all, I've just noticed I had a couple of radiators that needed bleed upstairs tonight in our new home. I started to bleed the radiators and noticed that while I was able to let alone ir out, it was not followed by water. After doing this a few times I noticed the radiators where getting...
  14. A

    Radiator sizing

    Does anyone have a link to a radiator sizing calculator which they've found to be reliable? I've got a 3.5 x 3.5 x 2.5m bedroom with a small adjoining closet and roughly 2sqm double glazed window which I need a rad for and the calculators I've used come up with vastly different results, ranging...
  15. C

    New combi boiler on plasterboard wall?

    Hi everyone looking for some assistance please as new to the whole renovation side of things. We are having a brand new central heating system fitting into our new flat in January as currently we have no heating at all. The only available wall is a stud wall which we'll be pulling down and...
  16. H

    Central Heating: No Hot Water: Blocked Coils?

    Hi all, newbie DIY-er here, I was adding some TRV valves to old radiators in my new/first home, and drained the system. Everything went ok, radiators working well once more. However, after a day I noticed the hot water tank was cold, and the feed & return pipes also cold. It is a standard...
  17. H

    Potterton ep2002 to hive 2

    Wondering if anyone has any info on how to wire my potterton ep2002 central heating controller to my new hive 2, also I have a thermostat I have wired into my system somehow that ideally I would like disconnected and linked out at the source, any help would be great cheers
  18. C5VHB

    Logic 24 combi boiler problem

    Hi, I have a Logic 24 Combi boiler. I have started having issues with the heating a couple of days ago when I realised the CH was not heating the radiators as much as it used to. I thought this may have been down to the pressure and tried to increase it slightly because it was on 1 bar and im...
  19. A

    Best way to conceal pipework

    I need to get a feed to a radiator in my hallway and am looking into the best way to conceal the pipework for it. I'm not a fan of boxing it in if possible, and am looking either recessing the pipework in the floor or wall - I'm undertaking substantial renovations currently so the mess isn't an...
  20. S

    Understanding Heating Controls and Thermostat

    Hi, I'm currently having issues with my central heating system (oil boiler) following replacement of an old programmable controller and room thermostat. I have some electrical knowledge as an electrician but not specific to heating and controls. So the basics; I have an oil boiler located in...
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