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Posted on Jun 05, 2017
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Condenser Fan and Compressor not turning on.

This is an older model 38L carrier a/c unit. The condenser fan was stopping after about twenty minutes of operation. I replaced the condenser fan and the 30uf/5uf dual run capacitor, with no results. I next replaced the motor start capacitor, with no results. The contactor is engaged when powered up, but nothing happens, no humming, nothing. I rechecked my connections, fuse box, etc. The schematic is too worn to read on the service panel, any help would be appreciated. -Jim

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  • Anonymous Jul 08, 2010

    Hello augie, no results means what? The new motor does the same thing or runs for 20min & shuts down Does the compressor run?

  • augie1458 Jul 08, 2010

    martin, Sorry, The new motor makes no attempt to turn on, it is not receiving power. The compressor does not run either. They were both operational last week. When I turn the thermostat on, in my house to cool, the contactor is engaged outside on the unit , but neither motor turns on. I was careful to make notes for the connections on the dual run capacitor. Could it be wired differently? I used the same Dayton motor that was in unit. Any info is appreciated.-augie

  • Anonymous Jul 08, 2010

    Jim DO you have a volt meter?Check for power at the contactor.Is there power to the unit ?Check the curcit breaker in the house panel & check the disconnect box next to the unit outside for 220volts.

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1 Answer

Thomas Woodburn

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  • Carrier Master 2,638 Answers
  • Posted on Jun 05, 2017
Thomas Woodburn
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Are you sure you have high voltage going to the unit? One wire from fan lands on top left of contactor, the other two go to C and Fan on capacitor. Manually push in contactor, if no fan than no high voltage.

If you need further help, reach me via phone at https://www.6ya.com/expert/thomas_092728000e6acb79

  • Thomas Woodburn
    Thomas Woodburn Jun 05, 2017

    Also make sure you have the jumper from the top right of contactor to the C on capacitor

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5 Related Answers

Anonymous

  • 182 Answers
  • Posted on Jul 29, 2008

SOURCE: Carrier Synergy 2000 Condenser fan does not turn on

the mfd is stamped on the side of the capacitor.Be careful to kill the power and to NOT touch the terminals.The capacitor is capable of holding a charge even after power is disconnected.

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HANK MCNEIL

  • 252 Answers
  • Posted on Sep 07, 2009

SOURCE: Carrier AC condenser unit stopped working. Power

if all is as you say you probably have a bad "dual motor run capacitor"

Anonymous

  • 1515 Answers
  • Posted on Jan 22, 2010

SOURCE: We require condenser fan motors for Interclisa

Hi, this is an odd voltage 380 volts. Is it a 3 phase unit? To get a 220 volt 50hz condenser fan motor, you will have to go through a refrigeration/air conditioning parts house and order this. 60hz you would have no problem finding one in stock. Carrier is a good unit, and have been around for many years. You shouldn't have any problems locating one.
Sincerely,
Shastalaker7
PS You will need to go through a wholesale parts house.

Anonymous

  • 7 Answers
  • Posted on Apr 15, 2010

SOURCE: the condenser fan for carrier xarios 300 is not

there is a run capacitor is probably bad.
you can purchase a replacement one from slakey brothers. However the capacitor will still have a charge after the power and wires are removed. after turning off the breaker use a long bladed screw driver and ground the electrical leads to discharge the capacitor before removing. take it with you to the supply house along with the model and serial number of the condensing unit.

Anonymous

  • 77 Answers
  • Posted on Jan 20, 2011

SOURCE: Carrier Model 38YCC030300 Completely frozen up Fan

Usually air fond froze if not moving enough air inside I.e. Dirty filter Or plugged coil ......or low on refrigerant

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Is the condenser fan (outside) turning? You mention that it's hot but don't say if it's turning or not.

These fan motors normally run pretty hot, but not so much that they shut down due to internal thermal overload protectors.

Both the compressor and the fan have termperature overload protectors to keep them from burning out the motor in the event of an overheated condition. The condenser fan must be running or high freon pressure will put an excessive load on the compressor and it will 'kick out' the high-temp overload protector.

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You can usually find these at electrical supply stores, well-stocked hardware stores, or most certainly at an HVAC parts house. Be sure to replace the old one with one of the EXACT same value (in voltage and Microfarads (mF) capacity. The shape may be a little different, but as long as the electrical characteristics are the same and is rated at the same or higher voltage than the original, it will work.

Connect the new condenser, mount it to the frame, and restart the unit. This should take care of the problem.

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MODEL # CARRIER 38XD124300

sounds like you had a condenser fan replaced ok you just have verify if the fan is a reversible one there is like a plug type connector on top of fan all you have to do is swap the position of the plug ex. if black / white to white/black that changes the rotation. check against the diagram it should be for the CCW position.
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