C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

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Old Feb 14, 2022 | 09:46 AM
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Default main fan running

Should the main radiator fan turn on when starting a cold engine? 89 vette Turns off when vette gets to 180*s
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Old Feb 14, 2022 | 11:40 AM
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I would say no, but the auxiliary fan might if a/c or defroster is on.
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Old Feb 14, 2022 | 01:49 PM
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Originally Posted by 7thvet
I would say no, but the auxiliary fan might if a/c or defroster is on.
This is the fan on the engine side of the radiator. It is the one the AC turns on automatically. Thanks for the input. Everything else is turned off.
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Old Feb 14, 2022 | 01:53 PM
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If the AC is on, yes it could. Otherwise it shouldn't until it hits a preset Coolant temp. That could be 228 F factory, but if someone changed it, or wired it to ground or a switch, then it would.
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Old Feb 14, 2022 | 03:23 PM
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Check the wiring of the fan relay. You may have the fan wire on the normally closed contact instead of normally open.
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Old Feb 15, 2022 | 04:40 AM
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There are no mods. Worked properly when I put it up for the winter. Went to do some work cleaning it up and the fan turned on as soon as I started it. Had a pressure switch go bad before wonder if I'm going down that road again.
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