Q: 2004 mercury mountaineer a/c works. No heat fan switch only works on 4 car not overheating Smell antifreeze inside car but no leak

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ac works no heat not overheating fan switch only works on 4 child kicked area near fan switch 150,500 miles always serviced by dealer

My car has 15000 miles.
My car has an automatic transmission.

The blower resistor in the blower housing for the a/c blower most likely has gone bad and open circuit in resistor. Replace the blower resistor. The smell of coolant in the dash vents may be from a leak in the heater core. It may still be a small leak that may not show up in a leak test or even cause the coolant to get very low except over a long period of time. Have the cooling system pressure tested and a mechanic like one from YourMechanic can determine if heater core is leaking and replace the blower resistor for you.

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