Safety of the appliance should be the primary goal of all technicians. The production of carbon monoxide (CO) in the flue gases should be kept below 100-ppm air-free, even though the allowable limit in the stack is 400-ppm air-free.
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.
Following up on Howard Leonard’s October 10, article, “Hidden Problems Can Cause Carbon Monoxide,” Leonard elaborates on the discharge side of the combustion air system, the flue.