My fiance plus I called a Service Company in Orland Park, after we smelled a different odor coming from the oil furnace, then during the middle of the night, my fiance woke up to get a drink of water plus use the bathroom, then she smelled an weird plus different smell in the house. She could not figure out where the odd odor was coming from, so she decided to wake me up, but i searched all over the house plus finally realized that the odor was coming from the oil furnace. I shut the oil furnace off right away. I was afraid there could be a fire or a major problem with the oil furnace, however my fiance plus I called a service dealer in Orland Park the next afternoon. It was pretty frigid since the oil furnace was off, both of us were thankful that the Orland Park service dealer had an appointment first thing in the afternoon that was available. My fiance plus I waited absolutely patiently for the service provider to arriveâ€¦ When she did, the woman right away got to work. She tested the oil furnace for carbon monoxide plus gas leaks. She could not find any reason for the odd plus weird stand. In fact, the Orland Park service provider told us that our oil furnace was still in easily relaxing shape for 8 years old, then the service provider was racking her brain trying to figure out why the smell was occurring. Then the woman got down on her hands plus knees plus looked around behind the oil furnace. That’s when we discovered the dead mouse right behind the machine. The dead mouse was getting warmed up by the oil furnace plus the warm smell of death was disgusting.