Hey everyone,
Been working on a cooling problem. Car heats up (over 230 degrees) while idling, fans never come on. The fans will come on with the A/C or if I jump the pins. Car cools down while going down the road (180 degrees). Used to always stay around 180. No codes thrown or SES. I used Freescan and in the "Sensor Diagnostic" tab at a temp of 229, looking at coolant temp the scaled reading was 108.5, Volt reading was 3.86 and A/D was OXC4. What does all that mean? I replaced the thermostat, changed coolant and bled system. Any ideas?

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'95 Z28, black, M6, T-Top, stock, graphite cloth, 108,000 miles
Ordered July 1994, built Dec. '94, purchased January 1995. Enjoy it as much today as when I bought it.

 

It could be a bad fan relay or temp switch for the fan its' self. I believe the fan temp sending unit is mounted on the water pump.

 

108.5 degC is the sensor reading, based on a 3.86 volt signal from the sensor. That's 227.3 degF, so the low speed fan should have come on. It's programmed for 226 degF, I believe, then 235degF for the high speed.

 

Injuneer, do those numbers indicate the sensor is working correctly? Thanks for the replies, Injun and Rob.