fan wont turn on I changed sending unit and temperature gauge is not showing hot

1995 CHEVROLET CAVALIER
272,134 MILES • 2.2L • 4 CYL • FWD • AUTOMATIC
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DAVID TUCKER
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My fan works with AC and when i unplug the temperature sending unit.
Oct 1, 2016 at 4:10 PM
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DAVID TUCKER
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I did change sending unit and temperature gauge is not showing hot.
Oct 1, 2016 at 4:13 PM
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CARADIODOC
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What problem are you trying to solve? A lot of GM engines need to get to around 220 - 224 degrees before the radiator fan turns on. Unplugging the 2-wire sending unit and the fan turns on proves the system is working.
Oct 1, 2016 at 5:57 PM
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DAVID TUCKER
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I understand that, but it seems like it is running hot idle over thirty minutes or more is that normal?
Oct 1, 2016 at 9:58 PM
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WRENCHTECH
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Most of them are programmed even higher than that Doc. 227 is average. If the fan turns on when you unplug the CTS, the system is working fine.
Oct 2, 2016 at 11:09 AM
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DAVID TUCKER
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Okay, just going to ride around and find out if seems good.
Oct 2, 2016 at 1:11 PM
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SATURNTECH9
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If it is taking a long time to warm up you might have a bad thermostat.
Oct 2, 2016 at 1:11 PM
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WRENCHTECH
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If will generally set a P0128 of the T-stat is stuck open.
Oct 2, 2016 at 1:14 PM
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SATURNTECH9
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Not on a 1995 GM car. I know we are used to working on later model cars with that code. lol.
Oct 2, 2016 at 1:16 PM
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DAVID TUCKER
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it seems to be doing good I have changed thermostat.
Oct 2, 2016 at 2:00 PM
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DAVID TUCKER
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well, I changed that after I put new head gasket on it.
Oct 2, 2016 at 2:01 PM
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SATURNTECH9
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Glad to hear it. we love to hear happy endings.
Oct 2, 2016 at 2:03 PM