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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. K

    hot water but no heating

    We have a dual heating system, a solid fuel stove with back boiler and a external kerosene heater. The kerosene heater is working fine heating the radiators and the water for the taps The solid fuel stove will heat the water for the taps but the radiators will only get luke warm. Can anyone...
  2. paulm05

    Grant combi oil boiler problems.

    My Grant combi oil boiler is giving me quite a headache at the moment. When I returned home last Friday I'd no heating or hot water. An engineer called the next day and diagnosed a faulty pressure switch. This was changed and everything seemed ok. However then the boiler began to lose pressure...
  3. M

    Combi boiler hot water but no heating

    My first thought when I heard this fault a combi boiler with hot water but no heating. Was a problem with the stat, controls not making the call for heat. If this is not the case. Can the divertor valve be the cause of the issue?
  4. 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...
  5. N

    3 way valve not working got hot water no heating help

    I have an old Potterton suprima boiler with a hot water tank and pump. We have hot water but no heating, the light on the boiler is showing amber (no call to heat) I have been told that this is likely due to the 3 way valve or motor on it (Myson Power Extra). I am wondering whether to try and...
  6. B

    No heating or hot water!

    I’ve been having some issues with my heating system. I noticed that the overflow was intermittently dripping and saw on the tank that i should drain the system and then open the pressure relief valve to reestablish an air gap. However the relief valve was broken so i was unable to do so. After...
  7. R

    no heating downstairs

    sorry for a dumb question beforehand we are having a strange issue where our downstair heating is not working on a S plan open vented system. the upstairs ones works fine. things tried so far radiators professionally flushed changed water pump regularly bled radiator but they dont bleed any...
  8. M

    No Heating or Hot water AlphaCD25C

    My partner has an Alpha CD25C fitted and worked until a couple of weeks ago. Intermittently it will switch off after working for 4-5 days. When checking the boiler lights A + B flashing red alternately and light D is green. Tried doing a reset and switching off the main power and restarting...
  9. R

    URGENT My bathroom underfloor heating is not working

    My bathroom underfloor heating is not working. It does work in the other rooms except bathroom. What could be reason ? I completely closed bathroom thermostat and re opened it still doesn’t respond.
    • Rose Pekcan
    • Thread
    • no heating not getting hot underfloor heating
    • Replies: 1
    • Forum: Central Heating Forum
  10. K

    Hot water no heating

    Hi, I have just had me diverter valve and cartridge replaced so solve my original issue of have both heating and hot water on at the same time without the option to turn off. But now I can’t turn my heating on. It’s on, on the boilers thermostat but doesn’t heat. I’ve disconnected all other...
  11. C

    Boiler running but no heating

    Hi boiler has been making a noise continuously for 24h as if running but no pressure or heating. Could this be because of a frozen condensation pipe? We can't check it die to location. Should we leave boiler on? Worried about energy costs as you can imagine. We had barely put heating on
  12. F

    Ideal 25kw combi boiler issue No heating Just hot water

    I wish to thank the boiler guy for disconnecting Hive for me from the combi boiler. You did a wonderful job of cutting off the heating bit, so now I cannot heat the house but still have lovely hot water coming out of the taps, So luckily I have moved my 76-year-old father out of the house. Turns...
  13. V

    Vaillant Ecotec plus 428 No heating

    Hi We've got a Vaillant ecotec plus 428 that doesn't seem to want to supply any heat to the radiators despite the hot water working just fine. Of some importance (I think) is that there is no radiator symbol displayed on the boiler screen, only a tap. We have a wireless thermostat (Altech...
  14. A

    URGENT No heating but got hot water

    Have a Alpha InTec 30c combi that gives me hot water but boiler cuts out after 30 seconds when calling for heating. It then restarts and tries to go for another 30 seconds and restarts. When I turn on hot water for around 15mins then swap to heating, the boiler then works... Could diverter...
  15. tobiasuk

    Hot water pipe keeps bursting (2 kids and no heating in November)

    Hello everyone, I'm not a plumber, but I'm having an issue which keeps re-occurring and the engineers coming out to us do not seem to know why. So here is the story. We have a pressurised system. When our boiler was serviced, the engineer had to abort the service as he found the following...
    • tobiasuk
    • Thread
    • america central heating system heating hot hot water keeps no heating pipe usa water
    • Replies: 15
    • Forum: USA
  16. D

    URGENT No heating or hot water still

    I posted earlier about my boiler pressure and that I had someone out and they said it needed a new heat exchanger now that was Monday so be a week tomorrow where they was last out my housing system are down at mo so no-one can look into it apparently but the gas engineer said I could keep...
  17. P

    URGENT Drayton Digistat No Working! No Heating Upstairs!

    Morning All I have a Valliant Ecotec Plus boiler which runs our under floor heating at ground floor and rads on the first and second floors. Both systems are controlled via a Drayton Digistat SCR with a receiver on the ground floor and the other on the first floor. All has been working well...
  18. B

    New Grundfos UPS3 15-50/65 130 Circulator pump fitted no heating and hot water - FD Fault code

    I have a 5 year old Ideal Logic 15 boiler that has been working alongside an old Grundfos pump possibly about 10years old. The boiler was recently (about 3 weeks ago) repaired and services by an Ideal technician. I had a plumber yesterday from Local Heros who came to fit a new Grundfos UPS3...
    • Brytto
    • Thread
    • america central heating system circulator code fault fitted grundfos heating hot hot water new no heating pump usa water
    • Replies: 7
    • Forum: USA
  19. R

    baxi 105he no heating

    hi to anyone that can help the above boiler has been fine until Friday last week when the ch stopped working the boiler fires up then after a min it shuts down the heating light is on and the temperature lights are on to max but no heating, run some cleaner through for a week and it came out...
  20. W

    No Heating and Hot water after 4 weeks, 6 engineer visits, a power flush and new pump - HELP!!! (please)

    We have a Glowworm BBU56F (back boiler). Its well-maintained/serviced and since we’ve been in the property (15 years) only the Thermocouple was replaced in July of this year, otherwise has been running fine. We’ve not had heating/hot water for a month now, and with 2 young kids/unwell missus...
    • Watergate
    • Thread
    • after engineer flush heating help hot hot water no heating please power power flush pump water weeks
    • Replies: 12
    • Forum: Central Heating Forum
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