Does the fan work normally when the engine gets hot? When the air conditioner is off, the fan runs if the coolant temp is above 221 F. If the A/C is on, it runs if the coolant temp is above 203 F up to 25 MPH, and 221F over 25MPH. EC-296-310 for diagnostic procedures. Says to put a 150 Ohm resistor across the connector for the coolant sensor and see if the fan runs. The good old days there was a pressure switch in the high line, when it got over a certain pressure, the fan came on.
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