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John Johnson
John Johnson Posted on Jun 23, 2019
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Carrier 38tkb030300 - condenser motor was making noise and finally quit. I replaced the motor & capacitor - still will not run. Compressor runs & the coils heat up, but the fan motor does not work.

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doughboy0486

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  • Contributor 16 Answers
  • Posted on Jun 24, 2019
doughboy0486
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There are many times a brand new motor out of the box is defective, or they gave you the wrong voltage motor... If it has been verified it is connected correctly and correct voltage, then take it back to supply house and have them test it or obtain another one

Testimonial: "It was wired right, and I thought, like you, that maybe the motor was defective. However, I put power to it, spun it a few times and it started right up and has been working fine since then! Probably something on the brushes or armature that needed cleaning off. Fixed! ;-)"

J Rosado

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  • Master 1,202 Answers
  • Posted on Jun 24, 2019
J Rosado
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Verify the motor leads have power. Test the motor for electrical continuity or ohms.

Testimonial: "It was wired right, and I thought maybe the motor was defective. However, I put power to it, spun it a few times and it started right up and has been working fine since then! Probably something on the brushes or armature that needed cleaning off. Fixed! ;-)"

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Thomas Woodburn

Thomas Woodburn

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  • Carrier Master 2,638 Answers
  • Posted on Jun 23, 2019
Thomas Woodburn
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Sounds like you wired it wrong.

Testimonial: ""It was wired right - I thought maybe the motor was defective. However, I put power to it, spun it a few times and it started right up and has been working fine since then! Probably something on the brushes or armature that needed cleaning off. Fixed! ;-)"

5 Related Answers

Anonymous

  • 143 Answers
  • Posted on Jul 25, 2008

SOURCE: GE Central A/C Unit about 30 yrs old; condenser fan stops after a short time.

I gather that it is the outdoor fan motor that runs a bit then stops.

Fan motors that stop by themselves are overheating and going into self-protect. The fact that you replaced the motor and capacitor opens up a whole world of "which wire is in the wrong place". I could do this if I could see it, but I can't see it. You're probably going to wind up calling a service man to sort out the wiring.

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Anonymous

  • Posted on Oct 15, 2008

SOURCE: Outdoor fan motor is not running fast enough?

Thanks for the suggestion. I figured out the problem. The replacement fan motor I bought was general fan motor. it had 5 wires. Two of them went to the capacitor (this unit has combo capacitor, 3 leg). I followed the schematic diag on the motor and connected one leg to the C and the other leg to the FAN on capacitor. what was happening, the start winding was working against the run winding in the motor. Once I switch the wires in the capacitor, fan ran at full speed. thanks again for your reply.

Anonymous

  • 3361 Answers
  • Posted on Mar 09, 2009

SOURCE: Carrier PTAC Condenser ices over.

You are describing normal operation for a heat pump unit.

Anonymous

  • 158 Answers
  • Posted on May 31, 2009

SOURCE: condensor fan not running after replacement

check fan rotation

Anonymous

  • 79 Answers
  • Posted on Apr 12, 2010

SOURCE: goodman model F48F97A76 need to know what the

if your condenser fan motor is not bad. change out fan capacitor

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Related Questions:

0helpful
1answer

How much will parts and labor cost?
A 3.5-ton Carrier CK....OK the run capacitor will be a 370 volt variety, likely 20 bucks tops....given that this is SINGLE capacitor dedicated to the compressor ONLY. A BIT more if (as is likely) it is a 3-terminal compressor/condenser motor capacitor. I assume you mean 'contactor' and this toy should be another $30+/- $5. (Hopefully the diagnosis you got was correct!) That aside, MOST folks in the residential realm use some sort of "flat-rate" system. Replacing the capacitor is ONE job and the contactor is another. If this is a commercial property (OR if you are aligned with a commercial entity), look for a contractor that will make the repair on a "time and materials" basis. One trip, 2 parts...time element should be MINIMAL. Good luck!
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Jul 05, 2014 • Carrier 38CKC042 Air Conditioner
0helpful
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Replace compacitor on Carrier 5 ton 3 phase AC
Your 3 phase unit should not have a capacitor. I'm guessing it's single phase. If it's a single capacitor than the compressor should not be going to it also. To test the motor, common to start plus common to run should equal the ohms you get between start and run. For instance, 1.2 ohms+ 2.2 ohms= 3.4 ohms. Follow the wiring diagram on the inside of the door, send model number!!

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

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Aug 29, 2017 • Carrier Heating & Cooling
0helpful
1answer

HAVE A CARRIER 38TKB030300 AIR CONDITIONER THAT HAS STOPPED COOLING, FAN UNIT STILL WORKS, JUST NO COOL AIR PRODUCED.
Compressor is not running check your low pressure switch
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Aug 10, 2013 • Carrier Heating & Cooling
0helpful
2answers

Can the compressor run w/ a 'blown' capacitor?
The capacitor starts the motor. You would have had some other problem had the motor not started. The A/C ran until the failing capacitor no longer provided the ability to start the motor at which point your A/C died.
My A/C bulged both its capacitors 2+yrs ago and it's been running ever since they were replaced, no problem.
I think you're OK.
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Sep 13, 2017 • Carrier 38CKC060 Air Conditioner
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Gas is Fine, Compressor runs, maybe after +-30min it trips the Breaker
Compressor amps gradually increasing. Due to Condenser block-Clean it. Running capacitor weak-Replace capacitor.Fan motor less rpm or winding weak.- Replace capacitor/motor. Helpful?
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Jan 09, 2011 • Carrier 36KCARMS Air Conditioner
2helpful
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38CKC036 Air Conditioner: outside fan will not come on makes a humming noise...
If the humming is your compressor running (feel the large copper line going into the unit, it should feel cold aftter a few minutes of run time) then the fan motor or the capacitor or both need to be replaced, check for voltage to the fan motor when the unit is "humming" if it has voltage and will not start replace the fan motor and the capacitor. hope this helps.
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May 18, 2010 • Carrier 38CKC036 Air Conditioner
0helpful
1answer

Carrier AC condenser unit stopped working. Power supply OK. Fan motor is not turning, and compressor just makes a click. This happened overnight. Any thoughts as to what the culprit may be??
if all is as you say you probably have a bad "dual motor run capacitor"
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Sep 06, 2009 • Carrier 38CKC042 Air Conditioner
0helpful
1answer

A/c unit not cooling
if it is making strange noises during operation it is going out on high pressure due to the condenser fan not running , check the capacitor for the fan to make sure it has not expanded also check if motor is getting proper voltage , is capacitor is good and motor has proper voltage supplied then you have a bad motor and should be replaced with new capacitor.
Phil
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Jun 11, 2009 • Heating & Cooling
0helpful
1answer

AC blower runs but compressor will not.
It could be the CONTACTOR. It could be dirty and when the system calls to run, the contactor won't make contact and complete the circuit. Worse case scenario, compressor is siezed up. If you hear a clicking noise at the condensing unit where the compressor is located, that could be the overload protector clicking and breaking the circuit if the compressor is seized up. Good luck. I hope it is a contactor or a capacitor.
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May 31, 2009 • Heating & Cooling
0helpful
2answers

Squeeling noise coming from AC, compressor is on, fan not turning
The squealing noise is coming from the compressor. This noise is common when the unit reaches extreamly high pressures. The pressure is most likely high because the fan is not running. Since you can spin the motor it could be that the motor has damaged windings. Leave the unit off until the repairs are made to ensure no further damage to the compressor. You will need a multi meter and some experience reading wiring diagrams to properly diagnose the system. You can perform an amp draw on the motor to see if it is in spec. You can measure the volts to the motor and see if they are in spec. Finally the contactor can be measured with the proper meter to see if it is working properly.

My suggestion is to have the Motor and capacitor both replaced. Also inspect the wiring in the condenser electrical compartment for any signs of damage or burning.
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Jun 17, 2008 • Carrier 38CKC042 Air Conditioner
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