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European 996 3.4 Fan operation

huong
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huong Member

huong

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I have a 996 early model and have some questions regarding cooling fan operation

simply this do the front cooling fans operate sequentially or in pairs, according to the local porsche center its sequential but I have had other responses that they both should come on together, Any one have the real story or can shed light on this

BRG Brett

:renntech:

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Loren Member

Loren

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They operate together in two stages.

At the prescribed temperature both sides turn on to stage 1 (lower speed). If the temperature continues to rise to the next level OR if the AC is turned on the both fans turn on to stage 2 (fast speed).

If a ballast is bad (on one side) or a fuse is blown or the fan motor is bad - then the fan on that side will start.

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