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two things, exhaust has a leak of gases or fuel leak from engine bay

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Q: Why can you smell fumes when the heater is on?
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Related questions

What is wrong when you can only smell gas fumes when the car heater is on?

what are you driving? email me direct if you wish


Does a hot water heater give off bad fumes?

No, hot water heaters don't typically have a smell. If you are smelling fumes, you could have a leak in your gas line.


What does it mean when radiator fumes are coming through the vents in a 1995 corvette?

Generally, with that smell- the heater core has gone bad.


Why do you smell gas fumes?

i smell gas fumes in 96 Nissan quest


What do you do when you smell fumes?

If you smell fumes, you should get out of the room, car, or house. Opening windows will help get rid of the smell.


Why would you smell exhaust fumes in a car only when the heater is on?

If the car heat has a fresh air setting, then it could be drawing air from outside of the vehicle. The fumes are most likely coming from a problem under the hood.


Why can i smell exhaust fumes in your 1975 beetle?

Volkswagens are kinda smelly anyway, but if there is a hole in the heater boxes or in the heater ducts leading to the cab, that can significantly increase the exhaust fumes in the cab. Also, if there's an exhaust leak through a rusty muffler, that's a loud, smelly problem.


Why does my 1999 Ford Expedition smell like antifreeze inside the car?

Your heater core may have a leak in it, allowing the fumes to invade the inside of the vehicle.


Why would you smell gas in a 1995 Chevy Cavalier only when the heater is on?

Possible leak in gas line. Must be some sort of air leak in the heater box under the hood. Heater is pulling fumes into car through the leak in it.


Is it dangerous too smell coolant in your car?

Breathing fumes from antifreeze cannot be good for your health as antifreeze is poisonous. If you are smelling fumes in your car you probably have a heater core leak. I recommedn you have this repaired ASAP. The only fix for a leaking heater core is to replace it. A very labour intensive job that is quite expensive.


Can peas give off fumes?

Peas do give off fumes. That's why you can smell them.


Fumes coming out of ac vents?

The "fumes" are more than likely antifreeze from a leaky heater core.