Mechanics

4 RUNNER, OVERHEATS AT IDLE. FAN COMES ON WHEN 1ST START IT, BUT NOT WEN IT OVERHEATS.

1993 Toyota 4Runner • 200,000 miles

It was overheating, so we changed the thermostat, didn't help. No leaks. But heats up in less than 10 mins at idle.
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Mdimberg
March 11, 2012.




Electrical fan should not come on when vehicle is started. If it does, you have a fault with the fan switch or wiring circuit.

Are both fans coming on or only one is?

KHLow2008
Mar 11, 2012.
Check the fan relay try swapping it with another 1 in the relay panel. It should run when the a/c on all the time.
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Cadieman
Mar 11, 2012.

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