Oil Boiler Repair & Installation London

Oil Boiler Repair and Installation in London

Oil boilers are less common in London than in rural areas but they are found throughout the outer boroughs, particularly in larger detached properties in areas like Bromley, Havering, Hillingdon and parts of Richmond that are not connected to the gas main. Your local engineer from 247 Plumber London services and repairs oil fired boilers across the whole of London, covering all the major brands and models.

Common Oil Boiler Problems We Fix

Boiler Failing to Fire

An oil boiler that will not light is one of the most common callouts. Oil boilers use a burner nozzle to atomise the oil into a fine spray before it is ignited by electrodes. When this nozzle blocks or wears, the spray pattern becomes incorrect and the boiler cannot establish a stable flame. Nozzle replacement is the most frequent oil boiler repair we carry out. The nozzle should be replaced annually as part of the service regardless of whether it has caused a breakdown, because a degraded nozzle produces incomplete combustion that wastes fuel and causes sooting.

Oil Pump Failure

The oil pump draws fuel from the storage tank and delivers it to the burner at the correct pressure. When the pump fails, the boiler either does not fire at all or fires briefly and then cuts out as the flame fails. A pump that is running but not delivering correct pressure will show a burner lockout fault. Pump replacement is a straightforward repair on most oil boiler models and we carry the most common replacement pumps on the van.

Sooting and Blocked Heat Exchanger

An oil boiler that has not been serviced regularly will accumulate soot deposits in the heat exchanger. Unlike gas, oil combustion produces carbon deposits that build up on the flue ways of the heat exchanger and progressively reduce the boiler’s efficiency. A heavily sooted boiler will consume significantly more oil for the same heat output. Annual cleaning is essential and neglecting it for several years can result in a heat exchanger that needs replacement rather than just cleaning.

Oil Supply Problems

Running out of oil is an obvious cause of a boiler that will not fire, but even when the tank has fuel there can be supply problems. A filter blocked with sediment or water contamination in the tank can starve the burner of clean fuel. London’s outer borough properties with oil tanks often have older tanks that have accumulated sediment over decades. The filter, usually located on the oil line between the tank and the boiler, should be cleaned annually as part of the service. If water has entered the tank, the tank needs draining and cleaning before normal operation can resume.

Oil Boiler Brands We Service in London

We service and repair all major oil boiler brands installed in London properties. Grant Vortex boilers are one of the most common in outer London, known for their reliability and wide parts availability. Worcester Bosch Greenstar Oil boilers are found in higher specification properties. Firebird boilers, including the Enviromax range, are widely installed. Warmflow, Boulter and Trianco oil boilers are also common in older London properties. We also work on older oil range cooker and Aga boiler systems in period properties throughout London’s more rural outer boroughs.

Annual Oil Boiler Servicing

An oil boiler must be serviced annually. Unlike gas boilers, which can sometimes be left for a year without catastrophic consequences, an oil boiler that misses its annual service will accumulate soot deposits that reduce efficiency rapidly and can create a fire risk in extreme cases. A proper annual service includes replacement of the burner nozzle, cleaning of the electrodes, cleaning of the heat exchanger flue ways, checking and adjusting the combustion quality with an analyser, inspection of the oil supply line and filter, and checking all safety controls.

We carry the consumable parts needed for most oil boiler annual services on the van, including nozzles in the most common sizes and ignition electrodes for all major brands. Most annual services are completed in a single visit of around ninety minutes to two hours.

New Oil Boiler Installation

If your oil boiler has reached the end of its life, we can supply and install a replacement. We will assess your property’s heat demand, recommend the right output, handle removal of the old boiler and disposal, and install and commission the new unit. Oil boiler installations in London require Building Regulations notification and we handle this as part of the installation.

Frequently Asked Questions

How often does an oil boiler need servicing?

Every year without exception. Oil combustion produces soot that accumulates in the heat exchanger and flue ways and must be cleaned out annually to maintain efficiency and safety. The nozzle should also be replaced at each service regardless of its apparent condition.

My oil boiler keeps locking out. What causes this?

The most common causes are a blocked or worn nozzle, a contaminated oil supply or blocked filter, a failing pump, or ignition electrode wear. A lockout fault code on the display tells us which part of the startup sequence failed, which helps narrow it down before we arrive. Call us and tell us what the display shows.

Can you service any brand of oil boiler?

Yes. We service Grant, Worcester Bosch, Firebird, Warmflow, Boulter, Trianco and all other oil boiler brands fitted in London properties. We carry nozzles and electrodes for all major models.