- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
It is not smoke though it appears so. It is thick heavy steam from a coolant leak in your heater core in the cabin area. It will smell very sweet if it is a typical glycol based antifreeze, and the windows will fog up as the hot coolant enters the cabin area of the vehicle. Primarily on the inside of the windshield. The cure is that your going to have to replace the heater core as it is leaking. Do this soon because if it ruptures completely you will have a major mess on the floorboard of your vehicle. Coolant is also poisonous to humans and animals if ingested. The heater core will be a little pricey as will the labor to replace it. Good luck. I guarantee you it is the heater core leaking.
I could be either one,but if you smell antifreeze, than you should be able to see a leak while the engine is at running temp. Fell the floor for wetness for heater core, Check under the hood for wetness for hose or radiator. Also, if your windshield fogs up, it is most likely the heater core. You can also pressure test the cooling system to verify where the leak is.
Sounds like a possible heater core failure(hole in it) the smell indicates to me the coolant(anti-freeze) is leaking into the passenger compartment. Check the carpet in front of the front passenger seat for moisture, this would confirm heater core leak. Good luck !
The mildew smell you refer to could be anti-freeze. When a heater core starts leaking it may allow anti-freeze (which circulates through it for heat) to be blown through the ducts onto the windshield in defrost mode. The repair is to have the heater core replaced. It may wait for the thermostat to open and allow the coolant to circulate before you notice it. Occasionally the carpet on the passenger side may be wet from leakage.
If you can feel the air from the blower motor blowing up on the windshield it is probably one of two things. Either your heater core has a leak and the anti-freeze mist film is all over the windows or your heater control valve is not working.
Does the heater get hot or can you feel hot air on the windshield? If so your heater core is probably leaking and making steam inside your car.
The early sign of a heater core leak is the smell of coolant, the reason is that only vapor is leaking now, it will gradually get worse in most cases and coolant will start comming out the heater box condensation drain.