Bad heater core?
Check your cabin air filter.
How To Find & Fix Coolant Leaks http://www.aa1car.com/library/coolant_leaks.htm
To change the water pump on a 1996 Chevy Prizm, start by disconnecting the battery and draining the coolant from the radiator. Remove the serpentine belt, then take off the timing cover to access the water pump. Unbolt the old water pump, clean the mounting surface, and install the new pump with a new gasket. Finally, reassemble everything, refill the coolant, and check for leaks.
How To Find & Fix Coolant Leaks http://www.aa1car.com/library/coolant_leaks.htm
To replace the thermostat on a 2000 Chevy Prizm, first ensure the engine is cool and then disconnect the negative battery cable. Drain the coolant from the radiator and remove the upper radiator hose connected to the thermostat housing. Unbolt the thermostat housing, replace the old thermostat with the new one (ensuring the correct orientation), and reassemble everything by reversing the steps. Finally, refill the coolant and check for leaks.
Probably the thermostat is sticking.
An antifreeze smell inside the car typically indicates a coolant leak, which can occur due to a damaged radiator, worn hoses, or a faulty water pump. When coolant leaks, it can evaporate and produce a sweet, distinctive odor. Additionally, a malfunctioning heater core can also lead to coolant entering the cabin, causing the smell. It's essential to address any leaks promptly to prevent engine overheating and potential damage.
To replace the upper and lower radiator hoses on a 1991 Geo Prizm, first ensure the engine is cool and then drain the coolant from the radiator. Using a screwdriver, loosen the hose clamps at both ends of the upper and lower hoses, then carefully remove the hoses. Install the new hoses by sliding them onto the radiator and engine fittings, securing them with the clamps. Finally, refill the radiator with coolant and check for leaks.
It leaks coolant.
The coolant leaks out.
Only if the sensor is malfunctioning.
To replace the water pump on a 1997 Geo Prizm, first, ensure the engine is cool and disconnect the battery. Remove the serpentine belt, then drain the coolant and detach any components obstructing access to the water pump, such as the timing cover if necessary. Unbolt the water pump from the engine block, clean the mounting surface, and install the new pump with a new gasket. Finally, reverse the disassembly steps, refill the coolant, and check for leaks.