During above average hot days the engine temperature creeps up when in city traffic but runs back to normal when I get above 35 mph or on days when the ambient temperature is below 80 it seems to hold it's normal temp. I have noticed that when this happens the electric radiator fan is not running? When it clicks on the temp stays normal.
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2002 Saturn L300
Question: sporadic overheating issue
Answer #1patrick mannion from Greg Solow's Engine Room, September 05, 2011, 19:03Master
Are you loosing any engine coolant? If your not loosing coolant the engine is not overheating. If you are concerned that this is not normal, perhaps the radiator is partially restricted, the thermostat is not fully opening.
Replyrmiami225, September 05, 2011, 19:51Rookie
No engine coolant loss, the temp gauge pegged and the air conditioner blew hot air until I got above 35 mph. Like I said, when this happens the electric radiator fan is not coming on! I just drove through town, it's raining and only 75 and everything was normal and even sat in the parking lot at idle for 10 minutes but the fan was running, the car acted normal but yesterday when it was above 90, the car overheated at low speed but the fan never came on to pull cool air through the radiator.
Answer #2shadetreemobile September 06, 2011, 08:43Technician
bad fan or ecm.