Question about 2002 Volvo S80
Some cars are simply wired in a manner to run the cooling fan with the key off and the doors locked in order to keep underhood temperature from climbing way too high for plastic engine parts to survive.
Usually there is not a problem with a dead battery because the fan switch will shut off the fan hours before the battery dies. If your battery is dead after such an episode it's more likely that you need a new battery than anything is basically wrong with the logic or operations of the fan switch. But it won't hurt to check the operational temperature if that is needed.
If you re-wire the switch to only operate when the key is on then you run the risk of over temperature on all your plastic parts under the hood. Some high dollar engineer has staked his/her reputation on having the wiring as it IS. It bugs the heck out of me too but maybe it's better to live with it?
Posted on Jun 28, 2009
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Posted on Jan 02, 2017
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