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REPPLACING FAN AND COMPRESSOR CAPACITORS WITH A SINGLE UNIT

I am replacing wo capacitors with a common unit. The, oblong, fan capacitor had two brown wires connected, one with a white line. The "run" capacitor has a fat black wire and a thn black wire. The thin black wire has a yellow wired connected to it. The fat black wire appears to be going to the compressor. My question is how do I connect the wires to the three-pronged capacitor?

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Well, it sounds as if you have a Coleman rooftop unit. If you have a start capacitor with a PTCR (Postive Temperature Coefficient Resistor) then it is different than if you have a Potential Motor Starting Relay. Why are you replacing the run and the fan capacitor?

Here is a link to the documentation that you need. If you do not have a Coleman and it is in fact a Duo-Therm, let me know the model number and I will be able to pull up the wiring schematic.

Thanks,

Jeff

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Posted on Jul 04, 2009

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It sounds like your unit has a dual capacitor. One side for the fan and the other for the compressor. All you will be doing (After rewiring the compressor wires as they were originally.) is abandoning the fan side of the capacitor, and wiring your new capacitor to the brown and brown with stripe wires. It does not matter which terminals the brown wires go on.

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