Should I be worried if I smell burning?

Yes, you should certainly be concerned and take prompt action whenever you detect an unexplained burning smell in your home, as odors are often the earliest warning sign of a potential fire hazard or equipment failure. If the burning smell is a mild, dusty scent during the first seasonal startup of a central heater, it is usually harmless seasonal burn-off. However, if the smell is sharp, pungent, and resembles melting plastic, burning rubber, or electrical insulation, it indicates a serious hazard such as a failing blower motor, an overloaded electrical circuit, or an electrical short circuit inside a wall. You should never ignore an electrical or chemical burning odor. You can verify safety by turning off power at the main breaker panel, inspecting appliances, and evacuating or calling emergency services if smoke, sparks, or intense heat are present.