That wouldn't be fuses. You probably have a bad thermostat (causing the engine to not reach proper operating temperature) low antifreeze, a bad blend door in the climate control system, or a blocked heater core. Based on the age of your vehicle, I'd say thermostat first, then low antifreeze for likelihood.
SOURCE: Heater blows cold air.
heater cores clog in taurus. way to know is this--engine fully hot--heat on reach down to the fire wall and grab hold of one of the heater hoses where it hooks to the core--one should be real hard to keep hold of because its that hot. If the other is close to the same the core is not clogged. But if the other is cold to the touch its clogged. You can remove the hoses and shoot garden hose water in one side or the other and break it loose usually
SOURCE: how to check fuses
check the water level in our radiator. If water level is low, it won't get to the heater core.
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