Ok so I'm gettin this weird burning plastic smell coming through the vents and all around my car. However electrical, plastic or a strong rubber burning smell while cooler is ON is an obvious sign of serious electrical issue related to the fan motor, main control board or a capacitor. Malfunctions in the heater can cause the plastic wire casings to fail and meltdown. If it was hot wires or hot resistor pack, I think you'd get just a general diffuse smell. Unless you give them an open ended timeline and tell them not to call back until it's fixed. Over the last 2 weeks or so, ive noticed that when I turn on my air vents (doesnt matter if a/c is on or off; inside or outside air), there is a faint smell of what I would call burning wire, almost as if there was a wire melting through its casing. Parts that may need to be replaced include: The capacitor. First time I noticed it a couple of weeks ago. Yesterday I briefly noticed a faint small, like burning rubber or insulation coming thru the heat vent. It's just your heater burning off dust. The smell went away shortly though and figured it might have just been the car burning in. I bought a used 2011 Focus SE and it does not smell good inside the car. Certain fabrics have plastic threads that might find their way into the filter. More often than not it's on the first start of the day on a stone cold engine. If the filter isn't regularly cleaned out, the build-up of hairs, threads and dust may begin to burn from the heat of the furnace. I park it for the session and investigate. That makes the most sense.if smell is coming out the vents, then smell is in the air stream. Something in your AC is overheating. In some cases, rubber, plastic, or other materials end up inside of the ductwork via the air vents. The smell of burning plastic could be a sign of an overheated household appliance, a kitchen accident, or a problem with the HVAC system. The melting of casings can also cause a burning rubber smell. The heater itself could be broken causing a burning smell from the antifreeze that is leaking into the heater vents. The first puffs of air that blow out of the vents smell like this and then it's immediately gone. david10708. There are 3 potential reasons you've noticed a burning plastic smell coming out of your air conditioning vents: There's a fire in your home somewhere and the AC is re-circulating the smell. If you smell a burning plastic smell or burning rubber smell that is not consistent throughout your house, try to isolate the location. By continuing to use this site you consent to the use of cookies on your device as described in our cookie policy unless you have disabled them. Basically I sometimes smell this brining plasticy smell from my front heater vents when my car is moving slowly such as in traffic or waiting in a red light line and my heat is on. A burning plastic smell from your pellet stove is entirely normal for the first few times. 24 Votes) If your house smells of burning plastic, take caution. It seemed like it was coming from the engine bay, and was coming in through the vents. Within an hour of first using it, I smelled smoke like burning plastic coming from the vent at the top. The smell is much more noticeable in the air coming from the vents as opposed to the furnace room . Yesterday, I was driving to work doing about 70mph on the highway and noticed this funny smell, almost like a burning steak or bacon coming in through the A/C vents. In February it started producing a foul smell from the AC vent for about 30 seconds but only after moving the truck about a half a mile. I assume it is not from engine bay burning leakin engine oil since it does not smell bad when a/c is off and air vent is open to circulate. The last month I have noticed a plastic like smell coming from the vents when the blower is running. Kinda like plastic that's been heated enough to soften but not actually melt or catch fire. The moment you notice this smell, switch off your AC and ask an AC technician to come and thoroughly check out your air conditioner. Another issue with the heater is that if it breaks, antifreeze can leak into the vents, increasing the unpleasant aroma of burning plastic. It seems to be stronger when the blower is started then weakens as the blower runs. Nobody likes a burnt clutch smell. I thought the burning smell would have disappeared. A Burning Smell From The Heating System Or Furnace. Signs this is the source of the smell: Your AC smells like burning plastic. If you smell a strange, acrid, burning plastic smell from your furnace, you may have an electrical issue: electrical components, particularly the blower fan, cycle on and off frequently. Something in your AC is overheating. I immediately checked out the Dell forum and read from a Dell Moderator and Liaison that "sometimes new monitors smell that way when they are . I did get a S.E.S light come on few times as well in the past, I. It's been real cold for a long time. You may also have problems in the heater system, including a bad motor, bad heater core, or another problem that may cause antifreeze to leak into the system and burn. If a burning smell is coming from your vents, this could be the result of a mechanical problem. 6. Kinda like plastic that's been heated enough to soften but not actually melt or catch fire. Heaters and furnaces may smell of burnt plastic when their parts are broken or worn out. Malfunctions in the heater can cause the plastic wire casings to fail and meltdown. Coming through the vents means you are drawing in a smell from under the hood or behind the dash. 10 DCSB, no problems prior to this. The smell of fire is an excellent warning sign that it is time to get yourself out of the situation. Chris M. I have only driven the car 5 times so far, but whenever I stop the car I get a smell coming from the passenger side vent of burning oil/burning plastic. AndrewJason. Again, the burning smell comes from the vents only for a few seconds when the ac first kicks on. A burning smell coming from your air conditioning system is problematic for numerous reasons. If they can't smell it burning they will not have a clue where to start. You say direct vent, does that also mean sealed combustion, where the combustion air is brought in from the outside and not from the house. I'd really appreciate any further info on how I can make this smell go away as cheaply as possible, hopefully avoiding having to buy new blowers. I've been told it could be oil leaking onto the exhaust but the thing is it just had an engine replacement as the head gasket blew. A new blower motor is ~$50 at rockauto or ~$56 at autozone. Cruising on a HWY, fan is on second setting, temp dial right in between blue and red. If the problem springs up and you discover a plastic bag, simply remove it to resume driving. The burnt plastic smell could be coming from your surroundings and traveling through the A/C vent. Only show this user. The smell of burning plastic indicates towards the fact the something is heating beyond an acceptable level. Vent is very warm when i park and get out them not to call back until it & # ;. 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