the heater core may be plugged up
If you have a block heater you could plug that in or move the vehicle inside a garage where the temperature is above the freezing mark
If you smell antifreeze inside your Ford F-150 cab, it could indicate a coolant leak from the heater core or related components. A leaking heater core can allow antifreeze to evaporate and produce a sweet smell inside the vehicle. It's important to address this issue promptly, as it can lead to further engine overheating or damage. Consider having a mechanic inspect the system to identify and fix the source of the leak.
There maybe bubbles accumulating inside of the over flow container after the vehicle runs up to temperature. There could also be an increase in fluid measured by the oil dip stick. Antifreeze burns white if leaked into the cylinder of the vehicle.
If the antifreeze and distilled water mixture is too weak for the ambient temperature then ( yes , the solution could freeze ) Ford vehicles come from the factory with a 50 / 50 mix of distilled water and the correct type of antifreeze for the vehicle Ford states not to exceed 60% antifreeze in the mix ( for colder climates etcetera )
Could be a few things. Does it leak antifreeze? if so, fix the part that leaks. If not, you could have coolant mixing with oil inside the engine, which burns it. check your spark plugs. If they are white, you are probably burning antifreeze - fix immediately. your exhaust will smell "sweet" as well if you are burning antifreeze.
Passenger side floor? Could be leaking heater core
Fogging on the inside of the windshield combined with a smell of antifreeze could indicate a coolant leak, potentially from the heater core. When the heater core leaks, coolant vapor can escape into the cabin, causing both the fogging due to moisture and the distinct antifreeze odor. This situation not only affects visibility while driving but can also lead to further engine issues if left unaddressed. It's important to have the vehicle inspected to prevent potential damage and ensure safety.
Some people say that the smell of hot antifreeze smells like mold. It could be possible you are smelling the antifreeze from the engine.
Moisture under your driver's side floor mat could potentially be antifreeze, especially if there's a leak from the vehicle's cooling system. However, it could also be water from rain, snow, or spills. To determine the cause, check for a sweet smell (indicative of antifreeze) and inspect for any visible leaks under the hood or beneath the vehicle. If you're uncertain, it's best to have it checked by a professional.
check the drain line on the a/c or does it have antifreeze smell to it then it could be the heater core
take it into a mechanic is the best way to save money, trying to find the leak yourself takes time. it could be a sealent problem or in most cases just a bad clamp or rubber hose. Coolant can certainly be lost through leaks in the cooling system hoses, but can also be lost through a blown head gasket which might cause the vehicle to idle or run rough, and will also result in water vapor or steam from the tailpipe. Coolant can also be lost through a faulty heater core, and this will cause the windows inside the vehicle to steam up constantly.
It could be a partially blocked heater core, a faulty heater valve that allows the coolant through the heater core or it could be a faulty water pump.