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Please identify compressor connections. Original = red to low, white to high left, nothing on high right. New 3n1 has black (common) and red (run) white (start) and twin black power lines.

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The three compressor pins are shaped in a triangle, the common is either directly on the top or directly on the bottom depending on the compressor. The wires of the supco are installed with the red to run, the white to start,and the black to common.(If the common is directly on top, run is lower right and start terminal is lower left) (If the common pin is directly on the bottom, the run is on the upper left, and the start is on the upper right) When you cut out the bad relay overload, the wires hook on the two black wires of the supco with bare ends.

Check for full 120 volts at the outlet, important.
If you have a meter you can ohm out the compressor windings, the run and start are connected to the common. It is easier to explain looking at a picture, so good luck.......... Picture a triangle with three letters c for common, r for run, and s for start........

The other thing to remember is there is a new type of compressor(some variable speed new one I am unfamiliar with) that does not use this setup, check the schematic(95% will) Consider if you still have a warranty on the compressor also. Supco also sells a 3n1 with a hook up for the old capacitor on its part, very handy, just plugs on, you do not mention it, so probably not the one you have. If you get your compressor running and it sounds good, do not buy a fridge full of groceries for a week or so, compressor may fail, let it run for a few days first, hope this helps,
good luck and do not forget to unplug when working on it..........

This is basically general information for a older refrigerator out of warranty....
Also consider the possibility of what could go wrong if you are not sure of your work, do not attempt this if there is a strong burn mark from old electrical s, replace compressor and or buy a new unit.

Posted on Mar 17, 2011

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Iam replacng my home a/c blower motor. My unit hasa red a black and a white wire. My new motor has a black wire a blue wire a red wire and a yellow wire. I need to know which color wire goes to which


On the original motor, red was low speed, black was high speed and white was common. The new motor should either have a diagram on the side of it or within the box for verification, but the black SHOULD also be high speed and the red wire SHOULD be low speed , the blue wire SHOULD be medium and the yellow SHOULD be common. However, you MUST verify those connections on the wiring diagram provided with the new motor before you connect or you will probably let out the MAJIC SMOKE !!! The speed you decide not to utilize can just be taped off and zip tied to the bundle.

You made no comment about two brown wires, and if either motor has two browns, they go to the run capacitor.

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How to wire in new hard start


It's very simple to install a 3N1 Supco Hard Start Relay, Some refrigerators have a run capacitor located on compressor or mounted nearby. It will be important that you use the run capacitor in with the 3N1 Hard Start. Here is a Photo of the=> URCO810_3_N_1
1_31_2013_3_26_55_pm.jpg
The instructions come with the 3N1 Hard Start Relay. Can you please post the model number of your refrigerator here so I can look up a wiring diagram? Look around the fresh food section door frame for your model number. I do need to know so we can get the right run capacitor in the 3N1 hard start circuit, Thanks Sea Breeze

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I am installing a 3n1 Hard start. Need to know what each pin on side of compressor is for, so I can install properly


compressor connectors are usually marked S - start white wire from supco start kit, C - common - black wire; R - Run - red wire. Check my video, that will give You better Idea. Thanks.

Oct 11, 2011 | Refrigerators

1 Answer

I took the pump out and repaced with a new one. The wiring lugs are different. the old one has White common, black low red High. The new one has no distinction as to what is low or high. How do I hook...


all US motors should have a wiring diagram on the side of the motor unit. The wires going into the pump would hold their same values. I am assuming the previous pump was two speed as well, if not that is your problem.
assuming that they are both two speed reference the common on the pumps motor diagram, and connect the white wire to that terminal.
reference the diagram for correct low speed and connect the black wire to that termial,
repeat for the high speed.
I deal alot with the flo master pumps and they should all be labeled. The most important thing is to get the common correct, switching the other two wires (black and red) incorrectly would simply result in high coming on when low is supposed to and vice versa.

If there really is not a diagram, here is the most typical setup for that motor.

(if you look closely at the terminals on the motor, there are numbers there)
connect the white common to terminal #5
connect the red hot wire to terminal #1
connect the black hot wire to terminal #2
connect the ground
done

Hope this helps.
If this post has helped you, please take the time to vote positively for me on this site.
thanks, and if you need more help, email me @ : adamh@newconceptchem.com

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1 Answer

Need to wire cap


I am assuming this is a combo fan and compressor capacitor.
In american air conditioners the cap has 3 sections all clear marked. The fan has an F and only 2 terminals, the compressor has a HERM (for hermedically sealed compressor) and only 3 terminals. The cap also Has a C for common with 4 terminals. What you want to do is connect a start wire from the fan which is usually a small plain brown wire to the F terminals. You would want to connect a start wire from the compressor which is a heavy wire to the Herm terminals. Then the compressor and fan both have a common wire those go to the C along with one side of the Power cord. The fan common wire can be purple or white. If you decide NOT to use the white wire for common you be sure to tape it off. Then you can use the brown wire with the white stripe fro common. The other side of the power cord will receive the RUN wires from the fan and the compressor. Note: If the fan has multiple speeds you must ONLY connect one speed at a time. Speeds are normally Black for high, Blue for medium and Red for low. So if your intent was to maybe bypass a switch or board you would tape off the blue wire and the red wire seperately and use the black wire for a high speed fan.

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Hi and welcome to the site,

To my recollection, wiring of a Windjammer:
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  • black - ground;
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  • blue - right;
  • green - running light;
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  • brown - accessory;
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While the Suzuki would have:
  • yellow - high;
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  • black/white - ground;
  • black - left;
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Good luck and thank you for asking.

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1 Answer

Replacing blower motor in furnace w/Fasco brand #D727


Some one missed the wiring diagram. I believe its like this:
L1 = Line 1 = (Hot all are same thing)
Black Hi
Blue Med
Red LO
Now usually the black is for AC and connects to a normally Open (NO) contact on the blower relay.
The heater speed (either red or blue) go the the normally Closed (NC) on the blower relay and on one side of this wire or contact on the relay it goes to the heating blower thermostat on the furnace.
The remaining wire (blue or red) you tape off.
L1 also feeds the Run Capacitor on 1 side and the Brown wire feeds the opposite side

The white wire is Neutral and goes to the neutral on the main line.

If this helps you please rate me accordingly and good luck.








Mar 13, 2009 | Kitchen Appliances - Others

1 Answer

RV AC, how to wire fan (blower) motor to capacitor.


You almost have it Look closer at the run capacitor. It has Herm, this is for the compressor, Com or C and F or Fan.

1 of your power wires is the fan speed so connect them accordingly usually black is hi, blue med, & red is low. You are "feeding" voltage to the selector switch on 1 side and coming out to the fan motor speeds.

Next you have a "Common" wire on your fan motor (this means its Common to all the other connections inside the fan motor to me. It is usually white. Connect this to the other line of power usually the Com on the capacitor unless it connects to a strip on the selector switch. But 1 of these 2 places will be the other side of your Power when plugged in. Lastly the brown it is usually the fan capicator only wire and it will connect to the fan "F" terminal on the capicator this terminal will not have any other wires connected to it.

This should make you a happy camper. Please rate me accordingly and good luck.

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I would go back to person who gave that advice because just the right touch on that capacitor and YOU my friend will be in the hospital. If this is helpful, please post as such. TY

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