When it comes to servicing oil boilers, it can take up to 2 hours to complete.
So, you might wonder why it takes a bit longer to service an oil boiler compared to a gas one. Oil boilers run on heating oil, so this can mean that they tend to produce more soot and debris as they operate. This means they require more of a thorough cleaning to ensure that they work efficiently and safely. Oil boilers also have extra components (such as oil filters) that need checking and possibly replacing. These parts don’t exist in gas boilers.
Heating engineers often have to fine-tune the burner and nozzle in oil boilers to ensure optimal combustion, which can be a delicate and time-consuming process. As gas burns cleaner than oil, gas boilers generally accumulate less residue and have fewer parts to check, making their annual service call (typically) much quicker.
So, although both types of boilers will require maintenance, oil boilers will need a bit more attention and time to keep them working correctly.