Question about Carrier 38CKC060 Air Conditioner

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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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  •  Christopher a Martin

    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

  •  Christopher a Martin

    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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  • 1,440 Answers

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.

Posted on Jun 05, 2017

  • 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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Posted on Jan 02, 2017

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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.

Posted on Jul 29, 2008

  • 252 Answers

SOURCE: Carrier AC condenser unit stopped working. Power

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

Posted on Sep 07, 2009

shastalaker7
  • 1515 Answers

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.

Posted on Jan 22, 2010

  • 7 Answers

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.

Posted on Apr 15, 2010

  • 77 Answers

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

Posted on Jan 20, 2011

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Hi, the tech should have been able to figure the stat out with out a manual to see why the condenser is shutting off at 1:00 P.M. This is unusual for this to happen, unless it was winter and this is a heat-pump going into defrost, but just the fan would shut down. Does this unit have a box on it that was installed by your electric company that shuts the unit off during high peak conditions in the summer? This would cause it to shut down at the same time everyday. If not, it would have to be something in the thermostat that is set for it to shut off at that time. It still does not make since, as it would shut both the indoor and outdoor unit off, not just the condenser. Are you saying that just the condenser fan motor is shutting off, but the compressor continues to run until it shuts off on high head pressure when the fan stops, or does the complete outdoor unit shut down fan, compressor and all at that time??. It sounds to me like this outdoor unit has a time delay relay that has a fault in it may be shutting it off at this time daily? Please let me know if its just the condenser fan motor that shuts off, or if the complete unit is shutting off all together, this will help .
Sincerely,
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2 Answers

I live in south texas overnight the ac stopped GOODMAN MODEL


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.

Turn off the unit by pulling the outside disconnect (in a small box near the outside compressor unit) or flip the AC breakers in the breaker box. Wait about 30 minutes for the unit to cool off and turn it back on. If the compressor and fan both run for awhile then kick back off, or the fan motor seems to be working under excessive strain, you've probably got a bad motor start condenser (inside the unit) that little round can that is connected through the fan motor wiring. If it's swollen or leaking, it's almost surely defective and even if it's not, excessive load on the motor is a classic sign of a bad start condenser.

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.

Hope this helps.

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