Might be a tiny leak in the heater core. Any leaked coolant could be draining via the heater box condensation drain when the vehicle is being driven, thus no puddle in the driveway. A cooling system pressure test might indicate any leaks, you can rent (or even borrow) the test equipment from some auto parts stores.
The reservoirs full, no leaks on the ground. Temperature is fine. But I smell coolant when I step out of my truck. But only on the passenger's side
1998 Ford Expedition 4 Dr XLT 4WD SUV
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Maintenance & Repair
I smell antifreeze inside my vehicle when i turn the heat on it fogs all my windows up
1999 Ford Expedition 4 Dr Eddie Bauer 4WD SUV
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Maintenance & Repair
No leaking anywhere and did a flush of the cooling system and new thermostat a week ago.
1997 Ford Expedition 4 Dr XLT 4WD SUV
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Maintenance & Repair
Hi, there is an electrical burning smell coming from my driver side front wheel. Its REALLY hot & has more brake dust on the rim than other tires. Help!
2007 Ford Expedition XLT
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Maintenance & Repair
Low heater temp and smell of antifreeze with heater on or off. Only leak found seems to be passenger side corner of radiator. Put new drain plug in but still wet in that area. Losing coolent but ...
2000 Ford Expedition XLT 4WD
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Maintenance & Repair
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