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I have a 220 volt compressor the contactor is kicking in when i turn the breaker on but the motor is not running im getting power on top and bottom of contactor

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Hi there,
the motor has a problem have check on this it develop a high current,why the high current appear,is it in the compressor or is it in the motor.find it out disconnect the belt from compressor and motor,then run the motor,if still tripping off w/o the compressor .it is in the motor
replace the bearing worn out,have a nice day dont forget to fix my rate,have a nice day

Posted on May 08, 2010

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1 Answer

Intertherm MGHA-070ABFC-05 will not run/cool


Multiple problems. Eliminate thermostat first. Remove face from wall and turn on breaker. If fan still runs you have a bad board or bad relay. If fan outside is running compressor should be too. These operate on same contactor. Verify you are getting 24 volts to coil side of contactor. If odf stops working and contactor remains pulled in you have a bad motor. If odf motor stops working the compressor will shut off due to overheating.

Jun 07, 2016 | Intertherm Heating & Cooling

1 Answer

Why won't the compressor run


This can be for a variety of reasons. It ranges from something as simple as no supply power (blown fuse, open breaker, faulty contactor, or run capacitor) or it could be more serious as a grounded or open winding in the compressor motor. My suggestion to any novice and or person without proper tools and knowledge; First check the low voltage (24 volt control voltage) by turning on the "Fan on" switch located on the thermostat to on, not "Auto" The blower fan should come on, indicating there's 120 volt and 24 volt available. Fan doesn't come on is an indication that there's no control power. The next step would be to check for power at the transformer and fuse located in the air handler. There should be 240 volts feeding the transformer, and 24 volts coming out. The control voltage is needed to operate the thermostat (which is the switch that sends the 24 volt signal to the compressor contactor to turn the compressor on/off. This 24 volt also powers other relays and switches in the system. knowing that 24 volt is available also tells you that the problem is most likely in the condensing unit (outside, where the compressor is located). At the condensing unit you should check for 240 volt supply power. Upon finding 240 volt supply power the question now becomes whether or not the thermostat is calling for anything (cool or heat if the unit is a heat pump). There should be 24-30 volt available at the small gauge wires feeding the contactor coil. While having the thermostat set at a temperature lower than the current room temperature (in the cooling mode) the thermostat should send a 24 volt signal to close the compressor contactor and turn it on. The non-metallic end of a screwdriver can be used to depress the moveable part of the contactor. After pushing in the contactor, should the compressor start then you may only need a new contactor. It may just hum because of a faulty run capacitor or grounded or shorted internal motor windings (grounded or shorted windings are usually indicated by tripped circuit breaker and/or blown fuse). It's a good idea to have a good multi-meter and knowledge of use before attempting any repairs or diagnosis on your own. I recommend some basic knowledge of electricity before even thinking about attempting any repairs or diagnosis.

May 08, 2014 | Goodman Manufacturing Goodman GSC130421...

1 Answer

Blows and fan kicks on but air not cold


Is the outside compressor running? I would check the capacitor. Look for swelling as a sure sign of capacitor failure. have you tried resetting the breaker? Sometimes that works but it don't cure the real problem. If the breaker is tripped lokk for reasons why it would trip the number one reason being a broken wire going off to one of the compressor terminals or a shorted capacitor. Capacitors can be bad in several differing ways, shorted, open, or wrong/out of spec caps can cause trouble. Is the contactor pulling in on the compressor side? Something gets under there and that can throw a monkey wrench in there also. 220 volts cal kill you so make sure you got the power turned off to the unit before attempting to do any repairs and if it is wet outside wait till the ground is dry. More here
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look for signs of burnt contacts on the contactor. Check the small coil under for continuity and make sure 24 volts ac is getting out there.
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If the motor ain't turning fast or growling at ya then use zoomoil to lube it up. Get some coil cleaner and go by directions wash down the condenser. Change the indoor air filters.
Make dang sure the power is off to the unit before doing the suggestions and do not get the motor wet or wait till it drys thoroughly before turning the unit back on.

Jul 03, 2011 | Goodman CKL30AR30 Air Conditioner

1 Answer

Model # ckl49-il serial # 0506126514. This unit stopped working yesterday, noticed the fan on the outside compressor wan't turning, how do i test the capacitor and fan to see which one to replace?


By far the most common problem with air conditions is the relay (known as a "contactor") by the air conditioner industry. This allows a low voltage (24 volts) electromagnet to turn on the 220 volt motor for fan and compressor. A replacement will generally cost about 50 to 75 dollars on Amazon.com.


Look for the wires entering the unit, The pair of wires entering the unit will go into a small (4" x 2" x 2") unit (the contactor). Another pair small diameter wires will go into the contactor (those are from the thermostat (or control panel of your furnace blower) and control the electromagnet switch.

The pair of output wires exit the unit and go to the compressor motor and fan.

You can check the output power by
1) Turning off the circuit breaker to the A/C
2) Unplugging the switch (must be a second switch within 3 feet of the A/C) near the house
3) opening up the outside panel on the A/C
4) Set voltage meter probes on the two output wires on the Contactor (make sure voltage meter is set to 220 volt AC range or higher)
5) turn on the outdoor switch
6) turn on the circuit breaker (if no body is near the unit and you can see the voltage meter without touching it)
7 check voltage meter to see that is says 220 volts AC

If not, then the contactor is bad and needs to be replaced.

A professional can usually do it for $200 including service call. I highly recommend calling a professional if you feel uncomfortable in any way about working with 220 volt systems. This voltage will kill you if you make a mistake!

-Mark

May 28, 2011 | Goodman CKL49AR49 Air Conditioner

1 Answer

The thermostast kicks on the fan bu the compressor does not kick on


Most of the time it will be your contactor outside in your condensing unit. It could also be your thermostat sometimes they click but the switch inside stat is not making connection. Also check your breaker panel and make sure breaker is not tripped it could be something as simple as that.
Be careful the A/C is 220 volts if you work on it make sure power is off. If your fan is working on the unit outside but the compressor will not come on you will have to install a superboost which are easily installed and about $30. they dont always work but its your last ditch effort to getting the compressor started.

May 09, 2011 | Heating & Cooling

1 Answer

A/C compressor has power to the contactor (220) but will not kick


Check for 24 volts at your contactor coil. If you have 24 volts at your contactor coil, then you should read 220 volts on the other side of the contactor. If you do not read 220 on the other side, then the contactor is failed and needs replaced. If you do not read 24 volts at your contactor coil, then you have to find out where the "break" is. See if you have 24 volts at "common" and "Y" at your outdoor unit. If you do not, the problem is somewhere between your outdoor unit and thermostat. If you have 24 volts at your outdoor unit but not at your contactor, you have a problem somewhere inside your outdoor unit. Using this information, do some more investigating and let us know what you find, we will guide you further from that point. Good Luck! :-)

May 25, 2010 | Goodman CKL60AR60 Air Conditioner

1 Answer

Goodman Manufacturing model CK42-1C won't start.


You ahve a bad breaker or bad capacitor. Check voltage across the terminals at the bottom of the contactor or the wires coming in frm the breaker. If you ahve 220 volts across these terminal then check across top terminals if you have 220 volts on top you have a bad capacitor. Replace it. Russ

Aug 18, 2009 | Heating & Cooling

1 Answer

My outside a/c unit fan stopped working. When I


By saying the condenser fan is not working as well, I have to ask is the contactor making any kind of noise?. If the contactor is not making noise, look for some smaller wires going to the contactor. These are the low voltage wires that send 24 volts to the contactor. Make sure the thermostat is turned on, set it for a temperature lower than the current room temperature. Are you getting voltage to the contactor? If the answer is no check the W wire at the air handler and at the thermostat. The G wire runs the inside blower only. This is why you can put the fan in the ON position and not have the compressor running all the time. If you are getting voltage at the contactor turn the power back on at the compressor, take a sturdy insultaded rod, very dry wood or plastic remember electricity can kill damp wood can conduct electricity. Look for a small bump in the center of the contactor. Press it with the rod and see if the compressor turns on. If it turns on when you press this point on the contactor and off when you release it then the low voltage side of the the contractor is bad. If the bump is pulled in and the unit is not running take the multimeter and carefully check to see if your are getting 240 volts across the two bottom connections and then 240 volts across the top of the connections. If you are getting 240 volts on one side only the the contactor is bad and you need a new one. Turn off ALL POWER this is the breakers for both the compressor and the furnace. Again make sure the power is off. Make a diagram of the wire positions, then disconnect them. Remove the contactor and take it to an electrical supplier or an HVAC parts supplier and get a new one. Reinstall it and reconnect the wires. Turn the power back on and everything should be working again.
Good Luck

Jun 15, 2009 | Ruud UBHC Air Conditioner

1 Answer

Fan does not turn but motor seems to be running fine


Rain should not affect an outdoor unit. It is designed to be outside. The motor that you are hearing... could this just be your compressor running? If the condenser fan is not operational the compressor will run much louder. TURN THE POWER OFF! See if the fan will spin freely if it is pushed. If it doesn't replace the fan motor. If it does you need to check the power at the contactor going to the condenser fan motor. This is 220 volts BE CAREFULL.. If power is going to the motor and the motor is not running... Change the motor and capacitor. If no power is going to it it could be a bad contactor.
Good luck....

Apr 11, 2009 | Goodman CKL24AR24 Air Conditioner

1 Answer

Ruud heat pump outside unit trips circuit breaker


Check your wiring between the contactor and compressor for a short to ground, or check the compressor windings for short to ground.
With the Tstat off, the contactor should be open so the only way for the compressor to be trying to do anything is if the 110 volts from the unbroken side are traveling through the compressor to ground. Since 110v is not enough to run it, the overload is kicking it out, cooling off, and repeating the cycle. When you kick on the Tstat, the contactor is supplying voltage directly to ground without going through the resistence of the compressor windings and kicking the breaker.
Post back and let me know what you find.

Nov 20, 2007 | Ruud Central System Air Conditioner

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