Originally Posted by beenthere
No, it is not an all in one cap.
If it has 3 separate terminals on it. It is known as a dual run cap. It serves both the compressor and the fan motor. But it is only a run cap. Not a start cap.
is known as a dual run cap . That is what i said in around bout way . If the cap is open the comp. will not run. I belive with out looking back at his post's. I belive he said the fan ran?? if so the comp. could be locked up. Here is more about the cap.
A dual run capacitor supports 2 electric motors, such as in large air conditioner or heat pump
units, with both a fan motor and a compressor motor. The dual capacitor has 3 terminals labeled "C", "FAN", and "HERM" for the common, fan, and hermetic compressor connections.
Round dual run capacitors (shaped as round cylinders) are commonly used for air conditioning
, to help in the starting of the compressor and the condenser fan motor.
Dual capacitors come in a variety of sizes, depending on microfarads
(µF), such as 40 plus 5 µF, and also the voltage. A 440 volt capacitor can be used in place of a 370 volt, but not a 370 in place of a 440 volt.
The microfarads must stay the same within 5% of its original value.
An oval dual run capacitor could be used instead of a round capacitor, but the mounting strap should be changed to better fit the oval shape.
A faulty dual capacitor often becomes swollen up, with the sides or ends bowed or bulged out further than usual: it can be clear to see that the capacitor has failed because it is swollen or even blown apart with capacitor oil leaking.
The U.S. EPA
stopped allowing manufacturers to produce capacitors with cancer causing PCBs
, and because of the replacement materials, the capacitors now have a limited shelf life.
When a dual capacitor fails in an A/C compressor unit, either the outdoor fan does not run, the compressor does not run, or both the fan and the compressor motors do not run.