If your house smells of burning plastic, take caution. The smell of burning plastic could be a sign of an overheated household appliance, a kitchen accident, or a problem with the HVAC system. Heaters and furnaces may smell of burnt plastic when their parts are broken or worn out.
For furniture and curtains, use your spray bottle of diluted white vinegar to eliminate any clinging burnt plastic smells. Again, don't worry about the vinegar smell. If you keep the windows open, it will soon dissipate. Finally, if you want to deodorize your carpets or rugs, you can sprinkle them with baking soda.
In general inhalation of plastic fumes can lead to an increased risk of heart disease, respiratory side effects such as aggravated asthma, skin irritations, headaches, nervous system damage, and other organ damage such as the kidney, liver, and reproductive system.
Burning smell
Call an electrician immediately if you smell something electrical burning. Most electrical wiring has plastic insulation. An electrical fire initially has a fairly acrid smell of plastic burning. The short could be in the outlet or in the wiring inside a wall and can be hard to locate.
Some people refer to this as a urine or burning rubber smell. This could be something electrical in the home overheating and melting its insulating plastic or rubber—which could lead to a fire. The most likely culprit is an appliance, such as a dishwasher, washing machine or an air conditioner.
Electrical fires tend to smell like burning plastic, so they have a telltale acrid odor. Others say the scent is reminiscent of fish. That said, electrical fires don't always produce an odor. In that case, you'd have to listen for a buzzing sound or check for a brown outlet cover.
A plastic burning smell in house situation can occur from a number of sources. Faulty wiring or an overheated appliance can have an odor that smells like burning plastic. If it's coming from your HVAC system, it could be from an overheated blower motor -- possibly due to heavy dust buildup or a clogged air filter.
Burning Dust
The most common reason you are encountering this smell is because the dust that has built up during the warm seasons is burning due to the heat. This smell should go away within an hour or two. If it persists after longer than that, check your air filter.
Phantosmia is a condition that causes you to smell things that aren't actually there. It's also called olfactory hallucination. The smells may always be present, or may come and go. They may be temporary or last for a long time.
Fires to energized electrical equipment would not only cause vapors from burning PCBs to be released into the air, but a highly toxic byproduct of burning PCBs, polychlorinated dibenzo-p-dioxins dioxins.
4. Burning plastic or rubber – if components or electrical elements inside your furnace are getting too hot, they may produce furnace smells similar to burning oil, hot plastic, or rubber.
If the house smells like smoke, but no fire is obvious, call the fire department. Use the non-emergency line, but call. The fire department may find the source of the smoke, and potential sources include burning plastic, metal, or electrical fires. Burning wood could also be the smell's cause.
Phantosmia is also associated with Alzheimer's and occasionally with the onset of a migraine. But it's not typically something sweet that's conjured up by the brain. “It's usually more unpleasant stuff or odors that are hard to describe,” says Hirsch. “People will say it's chemical-like or talk about a burning smell.”