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heating

  1. P

    Installing a tigerloop combi-3 in new heating oil supply installation.

    I’m replacing my single skin plastic oil tank with a new bunded oil tank. I’m going to replace the single 10mm pvc covered oil pipe too, so to keep the number of compression joints to a minimum, I’d like to fit an external tigerloop combi 3 de-aerator (the one that incorporates an isolation...
  2. H

    Underfloor heating loop not raising floor temperature

    I'm attending a wet underfloor heating system, it's an old one ..No flow meters, just adjustable valves on the returns with conventional actuators. Problem is , one loop (far right in photo) isn't heating the floor (timber suspended) . I've bled the loop via a hosepipe, shut off all the other...
  3. nashant

    Vibration when first opening hot tap after u/v cylinder heating cycle

    Hi all. As the title says, I have a problem with an unvented cylinder I had installed last year where the first time I turn a hot tap on after the cylinder has been heated I get what sounds like a vibration. It generally starts about 1s after I open the tap and lasts for about 1.5s. I've...
  4. U

    Does anyone's heating actually work as intended with thermostat?

    Hi all, I keep reading about how you should use a smart thermostat. Set it to the temp to want the home to be and hey presto it takes care of itself. But realistically who does this or rather who does this work for. With mine I just use it to turn the heating on now and then for short periods...
  5. M

    Please help identify this part under floor heating

    Hello, Have had a leak on my UFH manifold. Originally incorrectly diagnosed as being the nuts/washer to the pump, it now looks like it's coming from this thermostatic valve. Have tried googling "ufh thermostatic valve" and none of them look like this or have connectors like this (guessing part...
  6. R

    Rad heating up while off

    Hi I’m new here and don’t know a thing about plumbing so be gentle on me as I am also going to ask a possible dumb question, this summer I turned of the ”heating“ on the Drayton box and turned thermostat to zero but obviously had to keep the hot water on as I do every summer but I noticed the...
  7. R

    Replaced Central Heating Pump - still have issue

    I have a conventional system, Potterton Prima Boiler, into a Pump into a Motorised Valve that feeds the Radiators and/or the pipes in the Hot Water Cylinder. Analogue Controller with slide switches (replaced 2 years ago) and analogue Room Stat and Hot water cylinder Stat. I'm just an amateur...
  8. B

    Heating not working - Grundfos pump issue

    Hi all, I have an old Combi boiler for which the heating has stopped working. The hot water is fine, and I think I've isolated the problem to the pump. The pump is a Grundfos Alpha2, and it has usually has two numbers, but it is instead showing two dashes ( -- ). I think the propeller isn't...
  9. O

    Radiator not heating up

    Hi All, We renovated our house in 2019 and put in completely new plumbing system and piping including new boiler and 9 radiators. Off those, there is one radiator in the living room which does not heat up at all. I have tried balancing myself and also had a professional come in to balance it...
  10. E

    How to calculate heating system capacity for expansion tank

    Hello want to know on how do you calculate size of expansion tank for closed heating systems . for example 500 meters of 16mm underfloor heating and 4 double ~1000mm radiators , hot water cylinder coil , and oil boiler
  11. M

    Heating issue but hot water works

    I've got a heating boiler which heats up the water in a tank located in a cupboard upstairs and then from there I get hot water & hearing. I get hot water ok but the heating doesn't come on when turning the thermostat to a higher temperature. I've got a 2 way motorized diverter valve which would...
  12. D

    Heating problems, radiators fluctuating.

    Hi, My step daughter was ripped off by a cowboy builder so I’ve been helping her out and fittted her two radiator. I’ve no idea what is under some of the floors or in the walls but since flushing it all out and starting the combi up she’s been having problems with her heating. She reckons the...
  13. I

    Thermal Store Heating Up Cold Feed Pipe

    Hello, I have just installed a vented McDonald 250L thermal store, it is for multi fuel but currently just connected to a standard oil boiler in the garage which is fully pumped to the TS, the system has two pumps both basic 3speed Grunfoss, one on the boiler return and the other on the CH flow...
  14. S

    No heating flow. Pump and diverter working, what else could be wrong?

    Hello all, I have a WorcesterBosch Greenstar 42CDi classic combi, which is providing DHW fine, but not heating. Was working fine in spring, probably not been used until recently now it's colder. When heating is called for, the boiler fires up ok but soon shuts down the heater as the...
  15. K

    What could be wrong with central heating?

    Hoping for some advice as I seem to be hitting a brick wall. Moved into a house last year, radiators down strairs (4 of them) never really got warm, replaced the combi boiler this year as it was loud and leaking (its in the loft which has been converted into a room). Since turning the heating...
  16. J

    Blockages in 10mm plastic central heating pipes

    Our house was built in 2007 and we are the second family to live here - moving in in 2017. The central heating has been working fine - although the gas boiler is perhaps nearing the end of its life. But the boiler is not our current issue. Last winter two of the radiators did not heat up and...
  17. D

    New central heating - what should I be asking for?

    We live in a 1980s four-bedroom detached house. The time has come for new central heating. The current system is a mild revision of the original heating installed when the house was built, and this revision was largely to replace a life-expired boiler: non-condensing fan flue boiler open...
  18. J

    Cylinder System not running heating and water at the same time

    Hello, Newly moved into a house with a mains fed cylinder system. I've never had one before and struggling to get it working. When I turn either heating or water off at the timing unit, the other works fine. Eg, with heating off, water works and vica versa. The indicator lights are solid blue...
  19. B

    Main heat exchanger overheating when heating off

    Hi All, Have a peculiar problem with my Gloworm Flexicom 30cx combi boiler, the main heat exchanger is getting red hot and fault coding on overheat even though the boiler and central heating is not on, i shut the boiler down for a while, clear the fault code and it will be fine again for...
  20. D

    Redbrick house from 1904 - Already has underfloor heating

    Hi, I have an 1904 redbrick 2,500 square feet house. We have UFH on every floor. 3 Floors House is reasonably well insulated but far from perfect. Would there be any point in installing a "air to water" heating system that could link into my existing UFH??

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