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Old 09-09-2012, 08:41 AM   #16
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Discrepancy in wire colors


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I'm confused. The old blue wire was on lo on the board. You said to put the white to where the old blue was which would be LO and then to jump lo and high and then connect the black to that. Lo and high on the same jump?

Oops, good catch. Yes white would go where the ed was.

Since his new motor is only a single speed. the low and high of the board must be jumpered so it runs the motor no matter which speed the board is calling for.

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Old 09-09-2012, 08:43 AM   #17
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Discrepancy in wire colors


We all wonder off from time to time. ha!
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Old 09-09-2012, 08:49 AM   #18
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Discrepancy in wire colors


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we all wonder off from time to time. Ha!
rofl.
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Old 09-09-2012, 02:22 PM   #19
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Discrepancy in wire colors


How can you tell my new fan is single speed?
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Old 09-09-2012, 04:53 PM   #20
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Discrepancy in wire colors


OK, I capped off the brown/white, jumpered the blue to the black on the board and it still only hums.
Could my thermostat be the problem? or is the board bad? Shouldn't the compressor at least kick on?
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Old 09-09-2012, 04:59 PM   #21
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Discrepancy in wire colors


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OK, I capped of the brown/white, jumpered the blue to the black on the board and it still only hums.
Could my thermostat be the problem? or is the board bad? Shouldn't the compressor at least kick on?
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Was the compressor still coming on before you removed the old fan or was there still only this hum? Change that dual run capacitor.
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Old 09-09-2012, 05:03 PM   #22
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Discrepancy in wire colors


That cap looks new. Has it been changed? What made you think the fan was bad to begin with?

AS for the motors being single or two speed, post clear pictures of both of the data stickers on each motor and we'll be be able to tell.

Usually a multi speed motor has a red as well as a few other colorful wires (such as an orange and purple) for speed taps and there'll be different HP limitations or rpm's per wire, stated on the motor itself. White is a line voltage of a single speed motor.
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Old 09-09-2012, 05:28 PM   #23
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Discrepancy in wire colors


The compressor only hummed, at least something is humming, but the compressor didn't kick on. before changing fan,
it is a new cap,
I did change the dual capacitor with a new dual and wired it the same.
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Old 09-09-2012, 05:29 PM   #24
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Discrepancy in wire colors


The fan seemed to have a burnt smell to it.
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Old 09-09-2012, 05:44 PM   #25
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Discrepancy in wire colors


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The compressor only hummed, at least something is humming, but the compressor didn't kick on. before changing fan,
it is a new cap,
I did change the dual capacitor with a new dual and wired it the same.
So the old fan was working? Something else is wrong. Have you checked line voltage to the condenser, to and through the contactor? A new capacitor should have that compressor start on it's own UNLESS the motor start winding is weak and it now needs a hard start kit. What this is is a giant capacitor and relay (comes together in a kit) that connects to the compressor. It gives it up to 600% cranking power and immediately drops out of circuit, once the compressor has turned over and is running. We're talking about a millisecond.

It's quite common on older compressors to have this additional hard start capacitor installed.

Was the unit working, just something was smelling a bit funny? The more precise information we have the better we'll be able to assist you.

1.) Was anything wrong other than the smell?
1a.) Was the unit working before this fan replacement?
2.) Was the fan working?
3.) was the compressor working?
3a.) Was one or the other only working?
3b.) Was nothing working?
4.) Was the capacitor bad and that's why you changed it?
5.) When did you change the capacitor?
5a.) Why did you change the capacitor?
6.) Is the new cap the exact same uf and voltage rated capacitor as the old one?
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Old 09-09-2012, 05:45 PM   #26
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Discrepancy in wire colors


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How can you tell my new fan is single speed?
The 4 wires are. 2 hot and 2 cap wires.
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Old 09-09-2012, 05:49 PM   #27
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Discrepancy in wire colors


And is this hum new or old and are you certain it's coming from the compressor, the fan, or is it from the contactor?

A compressor will hum for maybe five seconds and then stop. It'll try an start again after maybe 15, 20-30 seconds, hum for five to ten seconds, and then stop.

A contactor will consistently hum as there's a magnetic field around a metal coil inside of the contactor when the thermostat is calling for cool. That would be without you pushing in the contactor yourself.

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