a/c condenser fan capacitor
#1
08-08-13, 12:15 PM
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a/c condenser fan capacitor
Fan wouldn't start without a push, compressor humming. Unit runs well after the push start. Question is unit has a hard start kit ..I assume I need to replace only the condenser's capacitor.the replacement 5/370 has 2 unmarked terminals ..How do I wire it? It's on a coleman presidential 2 unit.
Thanks, Jon
Thanks, Jon
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#2
08-08-13, 12:53 PM
There are normally two capacitors used (could be both in same "can"), one for the compressor, the other for the condenser fan. Since you're having problems with the condenser fan, you only need to replace it's capacitor. The hard start kit is for the compressor, so the capacitor that you need to replace shouldn't affect it. As to which capacitor is the one for the fan, you'll have to consult the wiring diagram, or follow the wiring. Whichever capacitor lead goes to the fan is the one that you need to replace.
#4
08-08-13, 02:20 PM
The capacitor is non polarized, meaning that it doesn't matter if you reverse the wires. Just disconnect the two wires from the bad capacitor and connect them to the two terminals on the new capacitor.
#5
08-08-13, 02:25 PM
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I'm not asking the question right..Does one terminal go to grd and the other to the fan? I understand non-polarized, but I need to know if the cap is 110v and grd or 110v and the same 110v on both terminals?
#8
08-08-13, 03:27 PM
OK, now I understand what your question is. One of the 3 terminals on the old capacitor is the common (where one end of each of the two capacitors join). You need to determine which of the 3 terminals is the common and connect a wire from the common to one side of the new capacitor and move the fan wire from the old capacitor to the other terminal on the new capacitor. The common terminal is probably wired to one side of the output side of the contactor.
#9
08-08-13, 03:43 PM
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Thanks you, sorry it took so long to get to the root of the question, so to restate.
One terminal (either one) with the brown wire to the fan and the other terminal jumped to the common terminal of the dual (old) capacitor which is coming off the contactor that's the relay right?
Maybe this is where I went wrong. Is the common 110v or ground?
Thanks Again
One terminal (either one) with the brown wire to the fan and the other terminal jumped to the common terminal of the dual (old) capacitor which is coming off the contactor that's the relay right?
Maybe this is where I went wrong. Is the common 110v or ground?
Thanks Again
#10
08-08-13, 04:17 PM
Yes, that is correct. The compressor (outside) unit runs on 240VAC. The common is one side of the 240V line. While it will measure as 120VAC if referenced to ground, I hesitate to refer to it as 120V, but rather one side of the 240V line. This signifies that the power line is 240V and not just two 120V lines which may or may not have the same phase.
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