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View Full Version : Carrier furnace fault 12


barjoe
Dec 1, 2009, 12:45 PM
What does R-W closed mean(under fault 12)

hvac1000
Dec 1, 2009, 01:06 PM
R and W are the wires that cause a call for heat.

StructureDesign
Nov 2, 2010, 02:15 PM
I have this problem going on right now with my furnace. So what does this mean and how does it get fixed?