A.c. unit heats up, fan not working

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  #1  
Old 08-06-14, 02:22 PM
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A.c. unit heats up, fan not working

Hello all. My Coleman Evcon(old) a.c. unit recently broke down. The unit hums but the fan doesn't spin even with a manual spin. The air is still blowing inside the house. I thought the a.c. fan motor went bad so I bought a replacement(Same Specs) and installed it. After I installed it, the fan still wouldn't spin on its own but now spins with help. The unit is still humming.

I read on multiple threads that it could be a bad capacitor. Guess what, I went out and bought a replacement( Same Specs). Now the unit is making a louder noise and the side heats up( coil?) And the fan doesn't spin even with my help. And the air is still blowing in the house. I installed the wires correctly on the cap. Now I'm completely lost. Please help me.

Thanks
 
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  #2  
Old 08-06-14, 03:00 PM
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Don't run the unit with out the fan running or you might be buying a new compressor too. Double check the wiring to the fan motor.
 
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Old 08-06-14, 03:01 PM
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Btw, I only turned it on for 2 minutes before turning it off because I freaked out.
 
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Old 08-06-14, 03:04 PM
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Good, I'm glad you freaked out.
 
  #5  
Old 08-06-14, 03:06 PM
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The wires on the new fan motor is black, Brown, green, white. The old motor has black, Brown, green, red. I connected the black to black, Brown to Brown, green to green, and what's left is white to red. There are also another 2wires white and black for the rotation of the fan. Do you think I connected the wires incorrectly?
 
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Old 08-06-14, 03:17 PM
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Name:  fan motor 3 and 4 wire.jpg
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Size:  27.2 KBDid you follow the wiring diagram on the new motor?
 
  #7  
Old 08-06-14, 03:55 PM
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Sorry, i'm really bad at looking at diagrams. I don't know what Sep. Cap means. Should I have connected the brown to white wire?
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  #8  
Old 08-06-14, 04:37 PM
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My fan is currently hooked up to your Dual Cap diagram, but the purple wire is a white wire for me.
 
  #9  
Old 08-06-14, 08:07 PM
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White wire from motor to C on capacitor then to the contactor. Brown wire from motor to fan on capacitor. Black wire from motor goes to contactor.
 
  #10  
Old 08-06-14, 11:35 PM
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That's exactly how I have it and still not working. Although the way the wires was originally connected was
Motor Red to Contactor then to C on Capacitor.
Motor Brown to Fan on Capacitor.
Motor Black to Contactor.
HERM on Capacitor to Compressor.

Maybe the quick splice wire connectors I used to connect the new motor wires to the existing wire harness has a bad connection. I'll try that next.
 
  #11  
Old 08-08-14, 10:47 PM
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IT'S ALIIIIIIVE!!!!!!!!!
So I removed the new fan wires from the existing old wires/harness and connected the new fan wires directly to the capacitor. Now the unit works perfectly. I assume the quick splice wire comnectors suck. Now the wife and kids will be happy in a cool house. Especially the wife

Thank you for your help Skaggsje.
 
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