effects of a bad cooling fan resister.
Just did a durametric check of my cooling fans on the 04 boxster S. Both fans worked on high and only the right on low. Switched low speed relays and nothing changed. I assume the ballast resister is bad on the left side.
My question is what effect will it have on anything if I can't get it fixed for a while. Will the high speed fan just come on quicker to cover for the inoperative low speed or is there another effect. It may be a while before I can get to replacing the resister. |
Usually, when the ballast resistor fails on the lower setting, the fan will not run at the slow speed - it does not revert automatically to the higher speed.
So your car will be left operating on one fan @ the slow speed, but if you think your temps are maybe too high, switch on the A/C which automatically reverts fans to high speed. |
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My right fan wasnt working at all and binding. Caused fuse to blow and melted part of my fuse block. I wound up swapping out both fans. My left one like yours only worked on high speed. Probably could have gotten away with replacing the resistor but I had the car apart anyway and cleaned the radiators while I was at it.
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