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Stl-986 · 06-04-2021, 06:56 PM

Sorry, didn't phrase that right. yes it will know cause it will turn the AC relay on, which in turn turns the compressor on. What I meant is that the DME doesn't really know (or care) if the compressor turns on or not. it doesn't get anything back from the compressor, it just turns a relay on or off. You can activate the AC but that doesn't mean the DME knows if the compressor is running or not. If in doubt look at your compressor, there is only 1 wire running to it.

Like everyone pointed out, it doesn't matter though cause it wont impact heat or not.

06-04-2021, 06:56 PM	#6
Stl-986 Registered User Join Date: May 2017 Posts: 1,180	Sorry, didn't phrase that right. yes it will know cause it will turn the AC relay on, which in turn turns the compressor on. What I meant is that the DME doesn't really know (or care) if the compressor turns on or not. it doesn't get anything back from the compressor, it just turns a relay on or off. You can activate the AC but that doesn't mean the DME knows if the compressor is running or not. If in doubt look at your compressor, there is only 1 wire running to it. Like everyone pointed out, it doesn't matter though cause it wont impact heat or not. __________________ 2000 Boxster Tiptronic 2003 Boxster 2003 996 C2 Cab 2002 996 (SOLD) 1986 944 (gone but missed)