What should be done if a gas furnace emits a strange odor?

When a gas furnace emits a strange odor, it is crucial to prioritize safety and investigate the cause of the odor immediately. A strange smell may indicate the presence of gas leaks, which can be highly dangerous and potentially lead to hazardous situations such as fire or explosion.

Evacuating the area ensures the safety of all individuals nearby, as gas leaks pose serious health risks, including asphyxiation or poisoning. Following evacuation, the next step would be to investigate for leaks without igniting flames or using electrical devices. Gas leaks should be checked by qualified professionals who can assess and repair any issues safely.

In contrast, adjusting the thermostat to a higher setting or continuing to operate the furnace as usual does not address the underlying concern of a potential gas leak and could exacerbate the problem. Clearing the furnace flue of debris is also not an immediate response to an odor issue, as it does not directly relate to the immediate hazards involved with gas exposure. Thus, evacuating the area and investigating for leaks is the appropriate action to take when encountering a strange odor from a gas furnace.