Get in touch with us to save money on your energy bills. Most oil boilers use kerosene as a fuel and are floor standing like their gas counterparts, they also come in both combi and heat-only condensing styles. The most common reasons for a pilot light going out are as follows. Quick response to my boiler brakedown, the engineer was very professional and clean working, reasonably priced, and helpful, going forward i'm now using this company to do my yearly service. No more dealing.