1994 Saturn L200 Over heating

It might be the computer-its job is to energize the fan relay relay when it senses the correct temperature from the coolant temperature sensor or a coolant temperature gauge sending unit.

Doing a block and pressure tests will help find what's causing it to overheat.

Do the block first to pinpoint a combustion leaking into the cooling system or a gas analyzer to sniff for hydrocarbons at the radiator fill neck.

Pressure test: do not do a pressure test if there's leakage at the headgasket this might cause coolant into the cylinders and lock it up or bend a connecting rod if cranked thereafter. The headgasket should be repaired before doing the pressure test.

If the block and pressure test passes check the following:, Pressure test the Rad. Cap, Clogged radiator, air lock in the cooling system, Fan clutch, Radiator electrical fan, collaspe hoses, water pump.