Regularly servicing an oil fired boiler can keep it operating at its most efficient level.
This reduces fuel bills and saves money on costly  call out fees for unexpected breakdowns, it is recommended that oil fired appliances and equipment
are serviced at least once a year or as recommended by the manufacturer.

There are many reasons why the efficiency of an oil fired boiler could be reduced .Here are a few;

Excessive smoke and partially burnt fuel deposits soot on the heat exchanger which restricts the amount of heat which the heat exchanger can transfer into the water.
A heat exchanger carries water around the boiler, absorbs  the heat from the hot fuel gasses and transfers it into the water.The cleaner the heat exchanger the efficient the boiler will be.

Oil nozzles will wear. They regulate how much oil is used and if it is not regularly replaced it could cause " sooting up " of the heat exchanger, and so  reduce heat transfer.

Photocells can glaze over with soot. Photocells are an important safety which detects whether  the flame is lit.
If a photocell  is dirty it may not be able to monitor the flame correctly and could cause the boiler to shut down randomly causing inconvenience.
Boilers switching on and off frequently will be less efficient than when running for long periods.

Electrodes can wear and carbon up. Electrodes make a spark to light the fuel,
if they are worn or covered with carbon  it will cause poor ignition so the boiler may not light.
Again causing inefficiently and increasing fuel cost.

Don't forget the oil tank

Oil storage tanks and supply pipes should also be checked during the service as condensation can form within the oil tank when the level is low.
The presence of water in a oil tank can cause equipment failure as well as reduce the boilers efficiency.
Filter elements will to be cleaned or replaced.

Appliances should be cleaned and components replaced as required when the boiler is being serviced . If your boiler is not serviced annually it is at higher risk of breaking
down and costing you more money.

Cleaning the boiler gives the service technician a chance to look for other tell tale signs that parts of the boiler may need replacing, inspection of the boiler combustion chamber provides
an opportunity to inspect the condition of the material and welds.
old steel heat exchangers will often leave a rust mark which can give a warning that the boiler will soon need replaced.

This provides an opportunity to plan work rather than have the inconvenience of trying to repair at short notice when an heat exchanger unexpectedly fails.

Long term damage can also occur if the boiler is not serviced regularly.During the combustion process, when the air mixes with the oil and is burnt, deposits such as sulphur build up on the internal surfaces of the heat exchanger and the baffles which redirect the flow of flue gasses inside the boiler to make it less efficient. If left for a number of years these deposits harden and with some designs of heat exchanger
render it impossible to remove the baffles without destroying them. A replacement baffle will come at a significant cost on the routine service charge.


As with any fossil fuel burning appliance ,poor or inadequate servicing can cause the generation of carbon monoxide. Soot deposits , flue blockages and blocked air vents can restrict the flow of exhaust gasses
and cause them to spill out into the surrounding room. Therefore it is absolutely vital that your boiler is checked annually for these problems.
Carbon monoxide is a highly toxic poisonous gas. It is odourless, colourless and tasteless and therefore difficult to detect.
Some symptoms of carbon monoxide poisoning  are as follows :


To reduce your risk of carbon monoxide poisoning it is advisable to fit an audible carbon monoxide detector.

If you need an audible carbon monoxide detector and don't know where to get one,
We offer a supply and fit service.

For safety, peace of mind and to minimise fuel costs and reduce the risk of unexpected breakdowns for oil users, It is recommended that an OFTEC registered technician services any oil
installation  at least annually.

OFTEC registered technicians are appropriately qualified and insured to work in your home and can also advise on energy efficiency.

List of towns and surrounding areas covered

Bangor, Newtownards, Ballynahinch, Dromore, Dromara, Hillsborough,Lisburn, Crumlin, Glenavy, 
Banbridge, Loughbrickland,  Newtownabbey, Belfast,  Armagh, Richill Craigavon, Portadown,
Tandragee, Gilford, Lurgan, Warringstown, Moria, Hollywood.
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