When facing a residential oil-fired furnace that is acting up, you want to get the situation under control as quickly as possible. A problem during the heating season will bring a call from an anxious and possibly agitated customer. The following are some of the most common issues that a service contractor addresses when troubleshooting an oil furnace, along with the possible cures.
Possible cures: Get some fuel. Check for a blown fuse or open circuit breaker, or if a switch has been left off, said Markarian.