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Heating oil is any petroleum product or other oil used for heating; a fuel oil. Most commonly, it refers to low viscosity grades of fuel oil used for furnaces or boilers use for home heating and in other buildings. Home heating oil is often abbreviated as HHO.Most heating oil products are chemically very similar to diesel fuel used as motor fuel; motor fuel is typically subject to higher fuel taxes. Many countries add fuel dyes to heating oil, allowing law enforcement to check if a driver is evading fuel taxes. Since 2002, Solvent Yellow 124 has been added as a "Euromarker" in the European Union; untaxed diesel is known as "red diesel" in the United Kingdom.
Heating oil is commonly delivered by tank truck to residential, commercial and municipal buildings and stored in above-ground storage tanks ("ASTs") located in the basements, garages, or outside adjacent to the building. It is sometimes stored in underground storage tanks (or "USTs") but less often than ASTs. ASTs are used for smaller installations due to the lower cost factor. Heating oil is less commonly used as an industrial fuel or for power generation.
Leaks from tanks and piping are an environmental concern. Various federal and state regulations are in place regarding the proper transportation, storage and burning of heating oil, which is classified as a hazardous material (HazMat) by federal regulators.

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  1. J

    Glow-worm fuel saver mk2 hot water but no heating

    Hi all, We have an old Glow-worm Fuelsaver MK2 boiler as part of our gravity fed system. The boiler had been making a loud banging sound for a while. That sound has suddenly stopped, but now we seem to have no heating. The pilot light is still on as usual and we have hot water. However, despite...
  2. R

    How to fix Hot water but no Heating

    Hi All Seems I have hot water but no heating. I seem to have a two pump system. The green pump (high left) throbs gently but the red one (low right) does not vibrate at all. Pipe at the top of the red pump is very hot, pipe at the bottom merely hot so I presume the red pump does the heating (how...
  3. C

    Ideal Isar HE30 no heating

    Morning all, just want to get an idea of the problem before I call engineer. Have been ripped off in the past, so.... Hot water absolutely fine. First time I’ve turned CH on this year, it makes all the right noises as though on, display shows ‘c’, pressure fine, but the rads still stone cold...
  4. B

    Flooding at Dad’s house – no heating or hot water (+video)

    Hello, There was flooding at my Dad’s house which has given us electrical problems and no central heating or hot water. I’d be very grateful for any advice what to do. I have made a video of the problem: https://sendvid.com/dsxmtsko The flooding led to a fuse which made the green switch in...
  5. G

    Baxi duotec 28 HE A- no heating

    Hi guys, hopefully somebody can help because I'm at my wits end here. I have a Baxi duotec 28 HE A with no heating but hot water is fine. There are no visible leaks in or outside the boiler and it has been regularly serviced.The honeywell stat and relay module have been replaced, but still no...
  6. Rogerf

    If we go to lockdown.

    If the government puts us in lockdown, customers with no heating or hot water ,what are we as engineers supposed to do. Doesn’t seem right to just say sorry but can’t attend
  7. S

    Getting a Remote Control RFWRT thermostat talking to a Worcester Boiler 28i

    Getting a Remote Control RFWRT thermostat talking to a Worcester Boiler 28i, changed the batteries, no heating, hot water working ?
  8. T

    Glow Worm Ultimate 30 C hot water but no heating.

    Hi everyone, hope you're all well and hopefully someone will be able to help with a problem I have. The boiler seems to fire up with heating no problem at the start of a program but will randomly stop heating. There are no error codes on the boiler and the thermostat (Climapro 2RF) shows no...
  9. finchy01

    EP3002 no heating but hot water fine

    Evening all. I've not needed to post on here for a while but it's silly season again and one of my first breakdowns has me scratching my head a bit. EP2002 blown as was the pump which had started leaking. Replaced both, pump now runs when heating demand is present but it doesn't warm up. It's...
  10. K

    hi i am looking for gas engineer. no heating in my house. i have got a cylinder

    hi i am looking for gas engineer. no heating in my house. i have got a water cylinder. help please
  11. L

    no heating- faulty wireless receiver ?

    My central heating failed to come on as timed a couple of days ago. Hot water is working fine. Boiler is a worcester Greenstar compact fitted new almost 6 years ago and serviced regularly. The wireless thermostat is a Salus ST620RF. There is a signal getting to the receiver from the thermostat...
  12. J

    No heating or hot water

    Fault finding on boilers has never really been something I’ve done much off.. pretty much always done installs so looking for advice. It’s an old Vokera , can’t remember the model, it’s about 8 years old and non condensing. Was working find earlier now absolutely no response to hot water or...
  13. E

    Ideal Logic 30+ combi boiler - no heating

    Hi all, Looking for some advice as to why my central heating is not working. We have recently moved 2 radiators, replacing one with a new one. When turning the boiler back on there is now no heating. We have hot water, we have checked the pressure, bled the radiators, reset the boiler. We do...
  14. J

    Johnson Starley errors - no heating or hot water

    Hello, Hoping for some advice... I have a Johnson Starley Quantec 24s that provides hot water to a tank and heating via hot air. It has been running great for a couple of years but this morning has started to display errors. If I run the heating the boiler displays error code E16 and if I run...
  15. K

    Boiler switches off -- no heating

    Hello everyone, My boiler has a problem since yesterday: it stays on for a few seconds and shuts off, then on again in about 10 minutes, then off after a few seconds and so on. The room thermostat sends the "switch on" signal fine (obviously, it is rather cold in the house now, so the...
  16. ljcasey

    Hot water but no heating after oil run out

    Hi all, first year in our new home which uses oil. In the summer we used elec only. In the winter we got some oil delivered and used that. The oil has just run out so I switched the immersion heater back on but we now have no heating but we do have hot water? The only thing I can think of is...
  17. J

    Worcester 24ii no heating

    hot water working fine, checked power at room stat and that’s fine but absolutely nothing happening when turning heating on at the boiler. Any ideas ?
  18. D

    BRTRF & BR1 Connected but no heating

    Hi all Any assistance would be very welcome. I have hot water but no heating. I have a BossTherm BRTRF wireless thermostat with a BR1 receiver in the airing cupboard. The green light is constantly on on the BR1. When I raise the thermostat you can here a 'click' in the airing cupboard but...
  19. Tony

    REMEHA AVANTA PLUS BOILER, NO HEATING ON RAD BUT HOT WATER COMING FROM TAP.

    Hi everyone Am having challenge on REMEHA AVANTA PLUS BOILER. When the room thermostat call for heat on rad no response but when the tap is open hot water comes out. When the boiler is on SERVICE MODE central heating working but tap water is cold. Please I need help on how to put things right...
  20. M

    Vaillant EcoTec 831 - no heating but hot water

    Hi I have an issue with our central heating. The hot water works fine but we have no heat coming from the radiators and yet strangely we do from the towel rails. Any ideas? So far I've tried reducing the boiler pressure by bleeding the radiator as it had gone into the red zone. It is now in...
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